author  wenzelm 
Sun, 15 Mar 2009 15:59:45 +0100  
changeset 30530  03c120763ea8 
parent 30461  00323c45ea83 
child 30539  c96c72709a20 
permissions  rwrr 
5363  1 
Isabelle NEWS  history userrelevant changes 
2 
============================================== 

2553  3 

27122  4 
New in this Isabelle version 
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27599  7 
*** General *** 
8 

30106  9 
* The main reference manuals (isarref, implementation, system) have 
10 
been updated and extended. Formally checked references as hyperlinks 

11 
are now available in uniform manner. 

12 

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* Simplified main Isabelle executables, with less surprises on 
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caseinsensitive filesystems (such as Mac OS). 
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 The main Isabelle tool wrapper is now called "isabelle" instead of 
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"isatool." 
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 The former "isabelle" alias for "isabelleprocess" has been 
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removed (should rarely occur to regular users). 
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21 

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 The former "isabelleinterface" and its alias "Isabelle" have been 
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removed (interfaces are now regular Isabelle tools). 
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Within scripts and make files, the Isabelle environment variables 
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ISABELLE_TOOL and ISABELLE_PROCESS replace old ISATOOL and ISABELLE, 
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respectively. (The latter are still available as legacy feature.) 
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The old isabelleinterface wrapper could react in confusing ways if 
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the interface was uninstalled or changed otherwise. Individual 
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interface tool configuration is now more explicit, see also the 
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Isabelle system manual. In particular, Proof General is now available 
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via "isabelle emacs". 
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INCOMPATIBILITY, need to adapt derivative scripts. Users may need to 
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purge installed copies of Isabelle executables and rerun "isabelle 
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install p ...", or use symlinks. 
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* The default for ISABELLE_HOME_USER is now ~/.isabelle instead of the 
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old ~/isabelle, which was slightly nonstandard and apt cause 
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surprises on caseinsensitive filesystems. 
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INCOMPATIBILITY, need to move existing ~/isabelle/etc, 
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~/isabelle/heaps, ~/isabelle/browser_info to the new place. Special 
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care is required when using older releases of Isabelle. Note that 
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ISABELLE_HOME_USER can be changed in Isabelle/etc/settings of any 
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Isabelle distribution. 
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* Proofs of fully specified statements are run in parallel on 
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multicore systems. A speedup factor of 23 can be expected on a 
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regular 4core machine, if the initial heap space is made reasonably 
29162  52 
large (cf. Poly/ML option H). [Poly/ML 5.2.1 or later] 
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27599  54 
* Generalized Isar history, with support for linear undo, direct state 
55 
addressing etc. 

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27191  57 
* Recovered hiding of consts, which was accidentally broken in 
58 
Isabelle2007. Potential INCOMPATIBILITY, ``hide const c'' really 

59 
makes c inaccessible; consider using ``hide (open) const c'' instead. 

60 

27599  61 
* Removed exotic 'token_translation' command. INCOMPATIBILITY, use ML 
62 
interface instead. 

63 

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* There is a new syntactic category "float_const" for signed decimal 
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fractions (e.g. 123.45 or 123.45). 
28964  66 

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* New prover for coherent logic (see src/Tools/coherent.ML). 
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27599  69 

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*** Pure *** 

71 

29608  72 
* Class declaration: sc. "base sort" must not be given in import list 
73 
any longer but is inferred from the specification. Particularly in HOL, 

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write 

75 

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class foo = ... instead of class foo = type + ... 

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* Module moves in repository: 
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src/Pure/Tools/value.ML ~> src/Tools/ 
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src/Pure/Tools/quickcheck.ML ~> src/Tools/ 
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* Slightly more coherent Pure syntax, with updated documentation in 
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isarref manual. Removed locales meta_term_syntax and 
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meta_conjunction_syntax: TERM and &&& (formerly &&) are now permanent, 
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INCOMPATIBILITY in rare situations. 
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* Goaldirected proof now enforces strict proof irrelevance wrt. sort 
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hypotheses. Sorts required in the course of reasoning need to be 
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covered by the constraints in the initial statement, completed by the 
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type instance information of the background theory. Nontrivial sort 
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hypotheses, which rarely occur in practice, may be specified via 
28633  92 
vacuous propositions of the form SORT_CONSTRAINT('a::c). For example: 
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lemma assumes "SORT_CONSTRAINT('a::empty)" shows False ... 
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The result contains an implicit sort hypotheses as before  
28631  97 
SORT_CONSTRAINT premises are eliminated as part of the canonical rule 
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normalization. 

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* Changed defaults for unify configuration options;
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* Changed defaults for unify configuration options: 
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unify_trace_bound = 50 (formerly 25) 
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unify_search_bound = 60 (formerly 30) 
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30106  105 
* Different bookkeeping for code equations (INCOMPATIBILITY): 
106 

107 
a) On theory merge, the last set of code equations for a particular 

108 
constant is taken (in accordance with the policy applied by other 

109 
parts of the code generator framework). 

110 

111 
b) Code equations stemming from explicit declarations (e.g. code 

112 
attribute) gain priority over default code equations stemming 

113 
from definition, primrec, fun etc. 

114 

115 
* Global versions of theorems stemming from classes do not carry a 

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parameter prefix any longer. INCOMPATIBILITY. 

28058  117 

28710  118 
* Dropped locale element "includes". This is a major INCOMPATIBILITY. 
119 
In existing theorem specifications replace the includes element by the 

30106  120 
respective context elements of the included locale, omitting those 
121 
that are already present in the theorem specification. Multiple 

122 
assume elements of a locale should be replaced by a single one 

123 
involving the locale predicate. In the proof body, declarations (most 

124 
notably theorems) may be regained by interpreting the respective 

125 
locales in the proof context as required (command "interpret"). 

126 

28710  127 
If using "includes" in replacement of a target solely because the 
128 
parameter types in the theorem are not as general as in the target, 

30106  129 
consider declaring a new locale with additional type constraints on 
130 
the parameters (context element "constrains"). 

28710  131 

29253  132 
* Dropped "locale (open)". INCOMPATIBILITY. 
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Interpretation command (theory/proof context) no longer simplifies goal.
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* Interpretation commands no longer attempt to simplify goal. 
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INCOMPATIBILITY: in rare situations the generated goal differs. Use 
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methods intro_locales and unfold_locales to clarify. 
27681  137 

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* Interpretation commands no longer accept interpretation attributes. 
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INCOMPATBILITY. 
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30106  141 
* Complete reimplementation of locales. INCOMPATIBILITY. The most 
142 
important changes are listed below. See documentation (forthcoming) 

143 
and tutorial (also forthcoming) for details. 

29253  144 

145 
 In locale expressions, instantiation replaces renaming. Parameters 

146 
must be declared in a for clause. To aid compatibility with previous 

147 
parameter inheritance, in locale declarations, parameters that are not 

148 
'touched' (instantiation position "_" or omitted) are implicitly added 

149 
with their syntax at the beginning of the for clause. 

150 

151 
 Syntax from abbreviations and definitions in locales is available in 

152 
locale expressions and context elements. The latter is particularly 

153 
useful in locale declarations. 

154 

155 
 More flexible mechanisms to qualify names generated by locale 

156 
expressions. Qualifiers (prefixes) may be specified in locale 

30106  157 
expressions. Available are normal qualifiers (syntax "name:") and 
158 
strict qualifiers (syntax "name!:"). The latter must occur in name 

159 
references and are useful to avoid accidental hiding of names, the 

160 
former are optional. Qualifiers derived from the parameter names of a 

161 
locale are no longer generated. 

162 

163 
 "sublocale l < e" replaces "interpretation l < e". The 

164 
instantiation clause in "interpretation" and "interpret" (square 

165 
brackets) is no longer available. Use locale expressions. 

29253  166 

167 
 When converting proof scripts, be sure to replace qualifiers in 

168 
"interpretation" and "interpret" by strict qualifiers. Qualifiers in 

169 
locale expressions range over a single locale instance only. 

170 

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* Command 'instance': attached definitions no longer accepted. 
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INCOMPATIBILITY, use proper 'instantiation' target. 
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* Keyword 'code_exception' now named 'code_abort'. INCOMPATIBILITY. 
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28114  176 
* The 'axiomatization' command now only works within a global theory 
177 
context. INCOMPATIBILITY. 

178 

30106  179 
* New find_theorems criterion "solves" matching theorems that directly 
180 
solve the current goal. Try "find_theorems solves". 

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* Added an auto solve option, which can be enabled through the 
29883  183 
ProofGeneral Isabelle settings menu (disabled by default). 
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184 

29883  185 
When enabled, find_theorems solves is called whenever a new lemma is 
186 
stated. Any theorems that could solve the lemma directly are listed 

187 
underneath the goal. 

188 

30461  189 
* New command 'find_consts' searches for constants based on type and 
30106  190 
name patterns, e.g. 
29883  191 

192 
find_consts "_ => bool" 

193 

30106  194 
By default, matching is against subtypes, but it may be restricted to 
195 
the whole type. Searching by name is possible. Multiple queries are 

196 
conjunctive and queries may be negated by prefixing them with a 

197 
hyphen: 

29883  198 

199 
find_consts strict: "_ => bool" name: "Int" "int => int" 

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30461  201 
* New command 'local_setup' is similar to 'setup', but operates on a 
202 
local theory context. 

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27381  205 
*** Document preparation *** 
206 

207 
* Antiquotation @{lemma} now imitates a regular terminal proof, 

27392  208 
demanding keyword 'by' and supporting the full method expression 
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syntax just like the Isar command 'by'. 
27381  210 

211 

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*** HOL *** 
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213 

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constructive version of Cantor's first diagonalization argument
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* Theory Library/Diagonalize.thy provides constructive version of 
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Cantor's first diagonalization argument. 
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216 

30298  217 
* New predicate "strict_mono" classifies strict functions on partial orders. 
218 
With strict functions on linear orders, reasoning about (in)equalities is 

30300  219 
facilitated by theorems "strict_mono_eq", "strict_mono_less_eq" and "strict_mono_less". 
30298  220 

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* Some set operations are now proper qualified constants with authentic syntax. 
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INCOMPATIBILITY: 
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op Int ~> Set.Int 
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op Un ~> Set.Un 
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INTER ~> Set.INTER 
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UNION ~> Set.UNION 
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Inter ~> Set.Inter 
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Union ~> Set.Union 
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{} ~> Set.empty 
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UNIV ~> Set.UNIV 
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232 

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* Class complete_lattice with operations Inf, Sup, INFI, SUPR now in theory 
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Set. 
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235 

29797  236 
* Auxiliary class "itself" has disappeared  classes without any parameter 
237 
are treated as expected by the 'class' command. 

238 

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239 
* Leibnitz's Series for Pi and the arcus tangens and logarithm series. 
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240 

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241 
* Common decision procedures (Cooper, MIR, Ferrack, Approximation, Dense_Linear_Order) 
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now in directory HOL/Decision_Procs. 
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243 

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* Theory HOL/Decisioin_Procs/Approximation.thy provides the new proof method 
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"approximation". It proves formulas on real values by using interval arithmetic. 
29810  246 
In the formulas are also the transcendental functions sin, cos, tan, atan, ln, 
30439  247 
exp and the constant pi are allowed. For examples see 
248 
HOL/Descision_Procs/ex/Approximation_Ex.thy. 

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249 

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* Theory "Reflection" now resides in HOL/Library. 
29650  251 

29628  252 
* Entry point to Word library now simply named "Word". INCOMPATIBILITY. 
253 

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* Made source layout more coherent with logical distribution 
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255 
structure: 
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256 

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src/HOL/Library/RType.thy ~> src/HOL/Typerep.thy 
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258 
src/HOL/Library/Code_Message.thy ~> src/HOL/ 
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src/HOL/Library/GCD.thy ~> src/HOL/ 
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260 
src/HOL/Library/Order_Relation.thy ~> src/HOL/ 
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261 
src/HOL/Library/Parity.thy ~> src/HOL/ 
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262 
src/HOL/Library/Univ_Poly.thy ~> src/HOL/ 
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263 
src/HOL/Real/ContNotDenum.thy ~> src/HOL/Library/ 
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264 
src/HOL/Real/Lubs.thy ~> src/HOL/ 
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265 
src/HOL/Real/PReal.thy ~> src/HOL/ 
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266 
src/HOL/Real/Rational.thy ~> src/HOL/ 
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267 
src/HOL/Real/RComplete.thy ~> src/HOL/ 
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268 
src/HOL/Real/RealDef.thy ~> src/HOL/ 
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269 
src/HOL/Real/RealPow.thy ~> src/HOL/ 
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270 
src/HOL/Real/Real.thy ~> src/HOL/ 
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271 
src/HOL/Complex/Complex_Main.thy ~> src/HOL/ 
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272 
src/HOL/Complex/Complex.thy ~> src/HOL/ 
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273 
src/HOL/Complex/FrechetDeriv.thy ~> src/HOL/Library/ 
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274 
src/HOL/Complex/Fundamental_Theorem_Algebra.thy ~> src/HOL/Library/ 
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275 
src/HOL/Hyperreal/Deriv.thy ~> src/HOL/ 
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276 
src/HOL/Hyperreal/Fact.thy ~> src/HOL/ 
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277 
src/HOL/Hyperreal/Integration.thy ~> src/HOL/ 
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278 
src/HOL/Hyperreal/Lim.thy ~> src/HOL/ 
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279 
src/HOL/Hyperreal/Ln.thy ~> src/HOL/ 
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280 
src/HOL/Hyperreal/Log.thy ~> src/HOL/ 
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281 
src/HOL/Hyperreal/MacLaurin.thy ~> src/HOL/ 
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282 
src/HOL/Hyperreal/NthRoot.thy ~> src/HOL/ 
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283 
src/HOL/Hyperreal/Series.thy ~> src/HOL/ 
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284 
src/HOL/Hyperreal/SEQ.thy ~> src/HOL/ 
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285 
src/HOL/Hyperreal/Taylor.thy ~> src/HOL/ 
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286 
src/HOL/Hyperreal/Transcendental.thy ~> src/HOL/ 
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287 
src/HOL/Real/Float ~> src/HOL/Library/ 
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288 
src/HOL/Real/HahnBanach ~> src/HOL/HahnBanach 
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289 
src/HOL/Real/RealVector.thy ~> src/HOL/ 
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290 

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291 
src/HOL/arith_data.ML ~> src/HOL/Tools 
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292 
src/HOL/hologic.ML ~> src/HOL/Tools 
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293 
src/HOL/simpdata.ML ~> src/HOL/Tools 
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294 
src/HOL/int_arith1.ML ~> src/HOL/Tools/int_arith.ML 
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295 
src/HOL/int_factor_simprocs.ML ~> src/HOL/Tools 
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296 
src/HOL/nat_simprocs.ML ~> src/HOL/Tools 
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297 
src/HOL/Real/float_arith.ML ~> src/HOL/Tools 
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298 
src/HOL/Real/float_syntax.ML ~> src/HOL/Tools 
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299 
src/HOL/Real/rat_arith.ML ~> src/HOL/Tools 
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300 
src/HOL/Real/real_arith.ML ~> src/HOL/Tools 
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301 

29398  302 
src/HOL/Library/Array.thy ~> src/HOL/Imperative_HOL 
303 
src/HOL/Library/Heap_Monad.thy ~> src/HOL/Imperative_HOL 

304 
src/HOL/Library/Heap.thy ~> src/HOL/Imperative_HOL 

305 
src/HOL/Library/Imperative_HOL.thy ~> src/HOL/Imperative_HOL 

306 
src/HOL/Library/Ref.thy ~> src/HOL/Imperative_HOL 

307 
src/HOL/Library/Relational.thy ~> src/HOL/Imperative_HOL 

308 

28741  309 
* If methods "eval" and "evaluation" encounter a structured proof state 
310 
with !!/==>, only the conclusion is evaluated to True (if possible), 

311 
avoiding strange error messages. 

312 

313 
* Simplifier: simproc for let expressions now unfolds if bound variable 

30304
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314 
occurs at most once in let expression body. INCOMPATIBILITY. 
28741  315 

28685  316 
* New classes "top" and "bot" with corresponding operations "top" and "bot" 
317 
in theory Orderings; instantiation of class "complete_lattice" requires 

318 
instantiation of classes "top" and "bot". INCOMPATIBILITY. 

319 

320 
* Changed definition lemma "less_fun_def" in order to provide an instance 

321 
for preorders on functions; use lemma "less_le" instead. INCOMPATIBILITY. 

322 

28604
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323 
* Unified theorem tables for both code code generators. Thus 
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324 
[code func] has disappeared and only [code] remains. INCOMPATIBILITY. 
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325 

28685  326 
* Constants "undefined" and "default" replace "arbitrary". Usually 
327 
"undefined" is the right choice to replace "arbitrary", though logically 

328 
there is no difference. INCOMPATIBILITY. 

28604
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329 

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330 
* Generic ATP manager for Sledgehammer, based on ML threads instead of 
28605  331 
Posix processes. Avoids potentially expensive forking of the ML 
332 
process. New threadbased implementation also works on nonUnix 

333 
platforms (Cygwin). Provers are no longer hardwired, but defined 

28606  334 
within the theory via plain ML wrapper functions. Basic Sledgehammer 
30106  335 
commands are covered in the isarref manual. 
28604
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336 

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337 
* Wrapper scripts for remote SystemOnTPTP service allows to use 
28475  338 
sledgehammer without local ATP installation (Vampire etc.). See also 
339 
ISABELLE_HOME/contrib/SystemOnTPTP and the VAMPIRE_HOME setting 

28604
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340 
variable. Other provers may be included via suitable ML wrappers, see 
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341 
also src/HOL/ATP_Linkup.thy. 
28474
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342 

28350  343 
* Normalization by evaluation now allows nonleftlinear equations. 
344 
Declare with attribute [code nbe]. 

345 

346 
* Command "value" now integrates different evaluation 

28248  347 
mechanisms. The result of the first successful evaluation mechanism 
348 
is printed. In square brackets a particular named evaluation 

349 
mechanisms may be specified (currently, [SML], [code] or [nbe]). See 

350 
further src/HOL/ex/Eval_Examples.thy. 

28227  351 

29125
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352 
* New method "sizechange" to automate termination proofs using (a 
29182  353 
modification of) the sizechange principle. Requires SAT solver. See 
354 
src/HOL/ex/Termination.thy for examples. 

29125
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355 

28088
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* Name bindings in higher specification mechanisms;
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356 
* HOL/Orderings: class "wellorder" moved here, with explicit induction 
723735f2d73a
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357 
rule "less_induct" as assumption. For instantiation of "wellorder" by 
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358 
means of predicate "wf", use rule wf_wellorderI. INCOMPATIBILITY. 
27823  359 

27793  360 
* HOL/Orderings: added class "preorder" as superclass of "order". 
361 
INCOMPATIBILITY: Instantiation proofs for order, linorder 

362 
etc. slightly changed. Some theorems named order_class.* now named 

363 
preorder_class.*. 

364 

30198  365 
* HOL/Relation: 
366 
Renamed "refl" to "refl_on", "reflexive" to "refl, "diag" to "Id_on". 

367 

28855  368 
* HOL/Finite_Set: added a new fold combinator of type 
369 
('a => 'b => 'b) => 'b => 'a set => 'b 

370 
Occasionally this is more convenient than the old fold combinator which is 

371 
now defined in terms of the new one and renamed to fold_image. 

372 

29671  373 
* HOL/Ring_and_Field and HOL/OrderedGroup: The lemmas "group_simps" and 
374 
"ring_simps" have been replaced by "algebra_simps" (which can be extended with 

375 
further lemmas!). At the moment both still exist but the former will disappear 

376 
at some point. 

377 

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378 
* HOL/Power: Lemma power_Suc is now declared as a simp rule in class 
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379 
recpower. Typespecific simp rules for various recpower types have 
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380 
been removed. INCOMPATIBILITY. Rename old lemmas as follows: 
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381 

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382 
rat_power_0 > power_0 
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383 
rat_power_Suc > power_Suc 
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384 
realpow_0 > power_0 
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385 
realpow_Suc > power_Suc 
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386 
complexpow_0 > power_0 
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387 
complexpow_Suc > power_Suc 
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388 
power_poly_0 > power_0 
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389 
power_poly_Suc > power_Suc 
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390 

27793  391 
* HOL/Ring_and_Field and HOL/Divides: Definition of "op dvd" has been 
392 
moved to separate class dvd in Ring_and_Field; a couple of lemmas on 

393 
dvd has been generalized to class comm_semiring_1. Likewise a bunch 

394 
of lemmas from Divides has been generalized from nat to class 

395 
semiring_div. INCOMPATIBILITY. This involves the following theorem 

396 
renames resulting from duplicate elimination: 

27651
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

397 

16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

398 
dvd_def_mod ~> dvd_eq_mod_eq_0 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

399 
zero_dvd_iff ~> dvd_0_left_iff 
28559  400 
dvd_0 ~> dvd_0_right 
27651
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

401 
DIVISION_BY_ZERO_DIV ~> div_by_0 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

402 
DIVISION_BY_ZERO_MOD ~> mod_by_0 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

403 
mult_div ~> div_mult_self2_is_id 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

404 
mult_mod ~> mod_mult_self2_is_0 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

405 

30224  406 
* HOL/IntDiv: removed many lemmas that are instances of classbased 
30044  407 
generalizations (from Divides and Ring_and_Field). 
408 
INCOMPATIBILITY. Rename old lemmas as follows: 

409 

410 
dvd_diff > nat_dvd_diff 

411 
dvd_zminus_iff > dvd_minus_iff 

30224  412 
mod_add1_eq > mod_add_eq 
413 
mod_mult1_eq > mod_mult_right_eq 

414 
mod_mult1_eq' > mod_mult_left_eq 

415 
mod_mult_distrib_mod > mod_mult_eq 

30044  416 
nat_mod_add_left_eq > mod_add_left_eq 
417 
nat_mod_add_right_eq > mod_add_right_eq 

418 
nat_mod_div_trivial > mod_div_trivial 

419 
nat_mod_mod_trivial > mod_mod_trivial 

420 
zdiv_zadd_self1 > div_add_self1 

421 
zdiv_zadd_self2 > div_add_self2 

30181  422 
zdiv_zmult_self1 > div_mult_self2_is_id 
30044  423 
zdiv_zmult_self2 > div_mult_self1_is_id 
424 
zdvd_triv_left > dvd_triv_left 

425 
zdvd_triv_right > dvd_triv_right 

426 
zdvd_zmult_cancel_disj > dvd_mult_cancel_left 

30085  427 
zmod_eq0_zdvd_iff > dvd_eq_mod_eq_0[symmetric] 
30044  428 
zmod_zadd_left_eq > mod_add_left_eq 
429 
zmod_zadd_right_eq > mod_add_right_eq 

430 
zmod_zadd_self1 > mod_add_self1 

431 
zmod_zadd_self2 > mod_add_self2 

30224  432 
zmod_zadd1_eq > mod_add_eq 
30044  433 
zmod_zdiff1_eq > mod_diff_eq 
434 
zmod_zdvd_zmod > mod_mod_cancel 

435 
zmod_zmod_cancel > mod_mod_cancel 

436 
zmod_zmult_self1 > mod_mult_self2_is_0 

437 
zmod_zmult_self2 > mod_mult_self1_is_0 

438 
zmod_1 > mod_by_1 

439 
zdiv_1 > div_by_1 

440 
zdvd_abs1 > abs_dvd_iff 

441 
zdvd_abs2 > dvd_abs_iff 

442 
zdvd_refl > dvd_refl 

443 
zdvd_trans > dvd_trans 

444 
zdvd_zadd > dvd_add 

445 
zdvd_zdiff > dvd_diff 

446 
zdvd_zminus_iff > dvd_minus_iff 

447 
zdvd_zminus2_iff > minus_dvd_iff 

448 
zdvd_zmultD > dvd_mult_right 

449 
zdvd_zmultD2 > dvd_mult_left 

450 
zdvd_zmult_mono > mult_dvd_mono 

451 
zdvd_0_right > dvd_0_right 

452 
zdvd_0_left > dvd_0_left_iff 

453 
zdvd_1_left > one_dvd 

454 
zminus_dvd_iff > minus_dvd_iff 

455 

27599  456 
* HOL/Library/GCD: Curried operations gcd, lcm (for nat) and zgcd, 
457 
zlcm (for int); carried together from various gcd/lcm developements in 

458 
the HOL Distribution. zgcd and zlcm replace former igcd and ilcm; 

30176
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

459 
corresponding theorems renamed accordingly. INCOMPATIBILITY. To 
27599  460 
recover tupled syntax, use syntax declarations like: 
27556  461 

462 
hide (open) const gcd 

463 
abbreviation gcd where 

464 
"gcd == (%(a, b). GCD.gcd a b)" 

465 
notation (output) 

466 
GCD.gcd ("gcd '(_, _')") 

467 

468 
(analogously for lcm, zgcd, zlcm). 

469 

470 
* HOL/Real/Rational: 'Fract k 0' now equals '0'. INCOMPATIBILITY. 

27551  471 

28964  472 
* The real numbers offer decimal input syntax: 12.34 is translated into 
30176
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

473 
1234/10^2. This translation is not reversed upon output. 
28964  474 

27651
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

475 
* New ML antiquotation @{code}: takes constant as argument, generates 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

476 
corresponding code in background and inserts name of the corresponding 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

477 
resulting ML value/function/datatype constructor binding in place. 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

478 
All occurrences of @{code} with a single ML block are generated 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

479 
simultaneously. Provides a generic and safe interface for 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

480 
instrumentalizing code generation. See HOL/ex/Code_Antiq for a toy 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

481 
example, or HOL/Complex/ex/ReflectedFerrack for a more ambitious 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

482 
application. In future you ought refrain from adhoc compiling 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

483 
generated SML code on the ML toplevel. Note that (for technical 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

484 
reasons) @{code} cannot refer to constants for which userdefined 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

485 
serializations are set. Refer to the corresponding ML counterpart 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

486 
directly in that cases. 
16a26996c30e
moved op dvd to theory Ring_and_Field; generalized a couple of lemmas
haftmann
parents:
27599
diff
changeset

487 

27424  488 
* Integrated image HOLComplex with HOL. Entry points Main.thy and 
489 
Complex_Main.thy remain as they are. 

490 

27599  491 
* New image HOLPlain provides a minimal HOL with the most important 
492 
tools available (inductive, datatype, primrec, ...). By convention 

493 
the corresponding theory Plain should be ancestor of every further 

494 
(library) theory. Some library theories now have ancestor Plain 

495 
(instead of Main), thus theory Main occasionally has to be imported 

496 
explicitly. 

27421  497 

28248  498 
* The metis method now fails in the usual manner, rather than raising 
499 
an exception, if it determines that it cannot prove the theorem. 

28233
f14f34194f63
The metis method now fails in the usual manner, rather than raising an exception,
paulson
parents:
28227
diff
changeset

500 

28700
fb92b1d1b285
The metis method no longer fails because the theorem is too trivial
paulson
parents:
28685
diff
changeset

501 
* The metis method no longer fails because the theorem is too trivial 
fb92b1d1b285
The metis method no longer fails because the theorem is too trivial
paulson
parents:
28685
diff
changeset

502 
(contains the empty clause). 
fb92b1d1b285
The metis method no longer fails because the theorem is too trivial
paulson
parents:
28685
diff
changeset

503 

27324
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

504 
* Methods "case_tac" and "induct_tac" now refer to the very same rules 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

505 
as the structured Isar versions "cases" and "induct", cf. the 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

506 
corresponding "cases" and "induct" attributes. Mutual induction rules 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

507 
are now presented as a list of individual projections 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

508 
(e.g. foo_bar.inducts for types foo and bar); the old format with 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

509 
explicit HOL conjunction is no longer supported. INCOMPATIBILITY, in 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

510 
rare situations a different rule is selected  notably nested tuple 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

511 
elimination instead of former prod.exhaust: use explicit (case_tac t 
904acdaf4299
induct_tac: mutual rules work as for method "induct";
wenzelm
parents:
27305
diff
changeset

512 
rule: prod.exhaust) here. 
27122  513 

27141
9bfcdb1905e1
* Attributes cases, induct, coinduct support del option.
wenzelm
parents:
27122
diff
changeset

514 
* Attributes "cases", "induct", "coinduct" support "del" option. 
9bfcdb1905e1
* Attributes cases, induct, coinduct support del option.
wenzelm
parents:
27122
diff
changeset

515 

27122  516 
* Removed fact "case_split_thm", which duplicates "case_split". 
517 

518 
* Command 'rep_datatype': instead of theorem names the command now 

519 
takes a list of terms denoting the constructors of the type to be 

520 
represented as datatype. The characteristic theorems have to be 

521 
proven. INCOMPATIBILITY. Also observe that the following theorems 

522 
have disappeared in favour of existing ones: 

523 

27104
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

524 
unit_induct ~> unit.induct 
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

525 
prod_induct ~> prod.induct 
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

526 
sum_induct ~> sum.induct 
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

527 
Suc_Suc_eq ~> nat.inject 
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

528 
Suc_not_Zero Zero_not_Suc ~> nat.distinct 
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

529 

30235
58d147683393
Made Option a separate theory and renamed option_map to Option.map
nipkow
parents:
30224
diff
changeset

530 
* The option datatype has been moved to a new theory HOL/Option.thy. 
30250  531 
Renamed option_map to Option.map, and o2s to Option.set. 
30235
58d147683393
Made Option a separate theory and renamed option_map to Option.map
nipkow
parents:
30224
diff
changeset

532 

27122  533 
* Library/Nat_Infinity: added addition, numeral syntax and more 
534 
instantiations for algebraic structures. Removed some duplicate 

535 
theorems. Changes in simp rules. INCOMPATIBILITY. 

27104
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

536 

28088
723735f2d73a
* Name bindings in higher specification mechanisms;
wenzelm
parents:
28085
diff
changeset

537 
* ATP selection (E/Vampire/Spass) is now via Proof General's settings 
723735f2d73a
* Name bindings in higher specification mechanisms;
wenzelm
parents:
28085
diff
changeset

538 
menu. 
28067  539 

30461  540 
* Linear arithmetic now ignores all inequalities when 
541 
fast_arith_neq_limit is exceeded, instead of giving up entirely. 

542 

27104
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

543 

27696  544 
*** HOLAlgebra *** 
545 

27713
95b36bfe7fc4
New locales for orders and lattices where the equivalence relation is not restricted to equality.
ballarin
parents:
27704
diff
changeset

546 
* New locales for orders and lattices where the equivalence relation 
30106  547 
is not restricted to equality. INCOMPATIBILITY: all order and lattice 
548 
locales use a record structure with field eq for the equivalence. 

27713
95b36bfe7fc4
New locales for orders and lattices where the equivalence relation is not restricted to equality.
ballarin
parents:
27704
diff
changeset

549 

95b36bfe7fc4
New locales for orders and lattices where the equivalence relation is not restricted to equality.
ballarin
parents:
27704
diff
changeset

550 
* New theory of factorial domains. 
95b36bfe7fc4
New locales for orders and lattices where the equivalence relation is not restricted to equality.
ballarin
parents:
27704
diff
changeset

551 

27696  552 
* Units_l_inv and Units_r_inv are now simprules by default. 
553 
INCOMPATIBILITY. Simplifier proof that require deletion of l_inv 

554 
and/or r_inv will now also require deletion of these lemmas. 

555 

556 
* Renamed the following theorems. INCOMPATIBILITY. 

557 
UpperD ~> Upper_memD 

558 
LowerD ~> Lower_memD 

559 
least_carrier ~> least_closed 

560 
greatest_carrier ~> greatest_closed 

561 
greatest_Lower_above ~> greatest_Lower_below 

27717
21bbd410ba04
Generalised polynomial lemmas from cring to ring.
ballarin
parents:
27713
diff
changeset

562 
one_zero ~> carrier_one_zero 
21bbd410ba04
Generalised polynomial lemmas from cring to ring.
ballarin
parents:
27713
diff
changeset

563 
one_not_zero ~> carrier_one_not_zero (collision with assumption) 
27696  564 

27793  565 

27485  566 
*** HOLNSA *** 
567 

568 
* Created new image HOLNSA, containing theories of nonstandard 

569 
analysis which were previously part of HOLComplex. Entry point 

570 
Hyperreal.thy remains valid, but theories formerly using 

571 
Complex_Main.thy should now use new entry point Hypercomplex.thy. 

572 

573 

27704  574 
*** ZF *** 
575 

576 
* Proof of Zorn's Lemma for partial orders. 

577 

578 

30176
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

579 
*** HOLCF *** 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

580 

78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

581 
* Reimplemented the simplification procedure for proving continuity 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

582 
subgoals. The new simproc is extensible; users can declare additional 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

583 
continuity introduction rules with the attribute [cont2cont]. 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

584 

78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

585 
* The continuity simproc now uses a different introduction rule for 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

586 
solving continuity subgoals on terms with lambda abstractions. In 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

587 
some rare cases the new simproc may fail to solve subgoals that the 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

588 
old one could solve, and "simp add: cont2cont_LAM" may be necessary. 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

589 
Potential INCOMPATIBILITY. 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

590 

78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

591 
* The syntax of the fixrec package has changed. The specification 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

592 
syntax now conforms in style to definition, primrec, function, etc. 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

593 
See HOLCF/ex/Fixrec_ex.thy for examples. INCOMPATIBILITY. 
78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

594 

78610979b3c6
add news for HOLCF; fixed some typos and inaccuracies
huffman
parents:
30163
diff
changeset

595 

27246
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

596 
*** ML *** 
28088
723735f2d73a
* Name bindings in higher specification mechanisms;
wenzelm
parents:
28085
diff
changeset

597 

29161
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

598 
* Highlevel support for concurrent ML programming, see 
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

599 
src/Pure/Cuncurrent. The dataoriented model of "future values" is 
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

600 
particularly convenient to organize independent functional 
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

601 
computations. The concept of "synchronized variables" provides a 
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

602 
higherorder interface for components with shared state, avoiding the 
29162  603 
delicate details of mutexes and condition variables. [Poly/ML 5.2.1 
604 
or later] 

29161
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

605 

30530  606 
* Simplified ML attribute and method setup, cf. functions Attrib.setup 
607 
and Method.setup, as well as commands 'attribute_setup'. 

608 

28294  609 
* Simplified ML oracle interface Thm.add_oracle promotes 'a > cterm 
610 
to 'a > thm, while results are always tagged with an authentic oracle 

611 
name. The Isar command 'oracle' is now polymorphic, no argument type 

612 
is specified. INCOMPATIBILITY, need to simplify existing oracle code 

613 
accordingly. Note that extra performance may be gained by producing 

614 
the cterm carefully, avoiding slow Thm.cterm_of. 

615 

28282
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

616 
* ML bindings produced via Isar commands are stored within the Isar 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

617 
context (theory or proof). Consequently, commands like 'use' and 'ML' 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

618 
become threadsafe and work with undo as expected (concerning 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

619 
toplevel bindings, not sideeffects on global references). 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

620 
INCOMPATIBILITY, need to provide proper Isar context when invoking the 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

621 
compiler at runtime; really global bindings need to be given outside a 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

622 
theory. [Poly/ML 5.2 or later] 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

623 

44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

624 
* Command 'ML_prf' is analogous to 'ML' but works within a proof 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

625 
context. Toplevel ML bindings are stored within the proof context in 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

626 
a purely sequential fashion, disregarding the nested proof structure. 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

627 
ML bindings introduced by 'ML_prf' are discarded at the end of the 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

628 
proof. [Poly/ML 5.2 or later] 
44664ffc9725
* ML bindings produced via Isar commands are stored within the Isar context.
wenzelm
parents:
28254
diff
changeset

629 

28099
fb16a07d6580
* Generic Toplevel.add_hook interface allows to analyze the result of
wenzelm
parents:
28089
diff
changeset

630 
* Generic Toplevel.add_hook interface allows to analyze the result of 
28103
b79e61861f0f
simplified Toplevel.add_hook: cover successful transactions only;
wenzelm
parents:
28099
diff
changeset

631 
transactions. E.g. see src/Pure/ProofGeneral/proof_general_pgip.ML 
b79e61861f0f
simplified Toplevel.add_hook: cover successful transactions only;
wenzelm
parents:
28099
diff
changeset

632 
for theorem dependency output of transactions resulting in a new 
b79e61861f0f
simplified Toplevel.add_hook: cover successful transactions only;
wenzelm
parents:
28099
diff
changeset

633 
theory state. 
28099
fb16a07d6580
* Generic Toplevel.add_hook interface allows to analyze the result of
wenzelm
parents:
28089
diff
changeset

634 

30395
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

635 
* More systematic treatment of long names, abstract name bindings, and 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

636 
name space operations. Basic operations on qualified names have been 
30399  637 
move from structure NameSpace to Long_Name, e.g. Long_Name.base_name, 
30395
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

638 
Long_Name.append. Old type bstring has been mostly replaced by 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

639 
abstract type binding (see structure Binding), which supports precise 
30399  640 
qualification (by packages and local theory targets), as well as 
641 
proper tracking of source positions. INCOMPATIBILITY, need to wrap 

642 
old bstring values into Binding.name, or better pass through abstract 

643 
bindings everywhere. See further src/Pure/General/long_name.ML, 

30395
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

644 
src/Pure/General/binding.ML and src/Pure/General/name_space.ML 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

645 

f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

646 
* Simplified interface for defining document antiquotations via 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

647 
ThyOutput.antiquotation, ThyOutput.output, and optionally 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

648 
ThyOutput.maybe_pretty_source. INCOMPATIBILITY, need to simplify user 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

649 
antiquotations accordingly, see src/Pure/Thy/thy_output.ML for common 
f3103bd2b167
* More systematic treatment of long names, abstract name bindings, and name space operations.
wenzelm
parents:
30326
diff
changeset

650 
examples. 
28088
723735f2d73a
* Name bindings in higher specification mechanisms;
wenzelm
parents:
28085
diff
changeset

651 

28089
66ae1926482a
* Result facts now refer to the *full* internal name;
wenzelm
parents:
28088
diff
changeset

652 
* Result facts (from PureThy.note_thms, ProofContext.note_thms, 
66ae1926482a
* Result facts now refer to the *full* internal name;
wenzelm
parents:
28088
diff
changeset

653 
LocalTheory.note etc.) now refer to the *full* internal name, not the 
66ae1926482a
* Result facts now refer to the *full* internal name;
wenzelm
parents:
28088
diff
changeset

654 
bstring as before. INCOMPATIBILITY, not detected by ML typechecking! 
66ae1926482a
* Result facts now refer to the *full* internal name;
wenzelm
parents:
28088
diff
changeset

655 

27246
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

656 
* Rules and tactics that read instantiations (read_instantiate, 
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

657 
res_inst_tac, thin_tac, subgoal_tac etc.) now demand a proper proof 
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

658 
context, which is required for parsing and typechecking. Moreover, 
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

659 
the variables are specified as plain indexnames, not string encodings 
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

660 
thereof. INCOMPATIBILITY. 
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

661 

27287  662 
* Disposed old type and term read functions (Sign.read_def_typ, 
663 
Sign.read_typ, Sign.read_def_terms, Sign.read_term, 

664 
Thm.read_def_cterms, Thm.read_cterm etc.). INCOMPATIBILITY, should 

665 
use regular Syntax.read_typ, Syntax.read_term, Syntax.read_typ_global, 

27269  666 
Syntax.read_term_global etc.; see also OldGoals.read_term as last 
667 
resort for legacy applications. 

668 

27380  669 
* Antiquotations: blockstructured compilation context indicated by 
27391  670 
\<lbrace> ... \<rbrace>; additional antiquotation forms: 
671 

27519
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

672 
@{let ?pat = term}  term abbreviation (HO matching) 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

673 
@{note name = fact}  fact abbreviation 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

674 
@{thm fact}  singleton fact (with attributes) 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

675 
@{thms fact}  general fact (with attributes) 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

676 
@{lemma prop by method}  singleton goal 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

677 
@{lemma prop by meth1 meth2}  singleton goal 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

678 
@{lemma prop1 ... propN by method}  general goal 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

679 
@{lemma prop1 ... propN by meth1 meth2}  general goal 
59b54d80d2ae
slightly improved @{lemma} (both for latex and ML);
wenzelm
parents:
27485
diff
changeset

680 
@{lemma (open) ...}  open derivation 
27380  681 

27246
df85326af57c
* Rules and tactics that read instantiations now demand a proper context;
wenzelm
parents:
27200
diff
changeset

682 

27979  683 
*** System *** 
684 

28676
78688a5fafc2
multithreading support only for polyml5.2.1 or later;
wenzelm
parents:
28633
diff
changeset

685 
* Multithreading for Poly/ML 5.1/5.2 is no longer supported, only for 
78688a5fafc2
multithreading support only for polyml5.2.1 or later;
wenzelm
parents:
28633
diff
changeset

686 
Poly/ML 5.2.1 or later. 
28254
d67ba23e0277
multithreading for Poly/ML 5.1 is no longer supported;
wenzelm
parents:
28252
diff
changeset

687 

28248  688 
* The Isabelle "emacs" tool provides a specific interface to invoke 
689 
Proof General / Emacs, with more explicit failure if that is not 

690 
installed (the old isabelleinterface script silently falls back on 

691 
isabelleprocess). The PROOFGENERAL_HOME setting determines the 

692 
installation location of the Proof General distribution. 

693 

27979  694 
* Isabelle/lib/classes/Pure.jar provides basic support to integrate 
695 
the Isabelle process into a JVM/Scala application. See 

696 
Isabelle/lib/jedit/plugin for a minimal example. (The obsolete Java 

697 
process wrapper has been discontinued.) 

698 

699 
* Status messages (with exact source position information) are 

700 
emitted, if proper markup print mode is enabled. This allows 

701 
userinterface components to provide detailed feedback on internal 

702 
prover operations. 

703 

704 
* Homegrown Isabelle font with unicode layout, see Isabelle/lib/fonts. 

705 

706 

27143  707 

27008  708 
New in Isabelle2008 (June 2008) 
709 
 

25464
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

710 

25522  711 
*** General *** 
712 

27061  713 
* The Isabelle/Isar Reference Manual (isarref) has been reorganized 
714 
and updated, with formally checked references as hyperlinks. 

715 

25994  716 
* Theory loader: use_thy (and similar operations) no longer set the 
717 
implicit ML context, which was occasionally hard to predict and in 

718 
conflict with concurrency. INCOMPATIBILITY, use ML within Isar which 

719 
provides a proper context already. 

720 

26323
73efc70edeef
theory loader: discontinued *attached* ML scripts;
wenzelm
parents:
26315
diff
changeset

721 
* Theory loader: oldstyle ML proof scripts being *attached* to a thy 
73efc70edeef
theory loader: discontinued *attached* ML scripts;
wenzelm
parents:
26315
diff
changeset

722 
file are no longer supported. INCOMPATIBILITY, regular 'uses' and 
73efc70edeef
theory loader: discontinued *attached* ML scripts;
wenzelm
parents:
26315
diff
changeset

723 
'use' within a theory file will do the job. 
73efc70edeef
theory loader: discontinued *attached* ML scripts;
wenzelm
parents:
26315
diff
changeset

724 

26650  725 
* Name space merge now observes canonical order, i.e. the second space 
726 
is inserted into the first one, while existing entries in the first 

26659  727 
space take precedence. INCOMPATIBILITY in rare situations, may try to 
26650  728 
swap theory imports. 
729 

27067  730 
* Syntax: symbol \<chi> is now considered a letter. Potential 
731 
INCOMPATIBILITY in identifier syntax etc. 

732 

733 
* Outer syntax: string tokens no longer admit escaped white space, 

734 
which was an accidental (undocumented) feature. INCOMPATIBILITY, use 

735 
white space without escapes. 

736 

737 
* Outer syntax: string tokens may contain arbitrary character codes 

738 
specified via 3 decimal digits (as in SML). E.g. "foo\095bar" for 

739 
"foo_bar". 

740 

25522  741 

25502  742 
*** Pure *** 
743 

26718  744 
* Contextdependent token translations. Default setup reverts locally 
745 
fixed variables, and adds hilite markup for undeclared frees. 

746 

26681  747 
* Unused theorems can be found using the new command 'unused_thms'. 
748 
There are three ways of invoking it: 

749 

750 
(1) unused_thms 

751 
Only finds unused theorems in the current theory. 

752 

753 
(2) unused_thms thy_1 ... thy_n  

754 
Finds unused theorems in the current theory and all of its ancestors, 

755 
excluding the theories thy_1 ... thy_n and all of their ancestors. 

756 

757 
(3) unused_thms thy_1 ... thy_n  thy'_1 ... thy'_m 

758 
Finds unused theorems in the theories thy'_1 ... thy'_m and all of 

759 
their ancestors, excluding the theories thy_1 ... thy_n and all of 

760 
their ancestors. 

761 

26718  762 
In order to increase the readability of the list produced by 
763 
unused_thms, theorems that have been created by a particular instance 

26874  764 
of a theory command such as 'inductive' or 'function' are considered 
765 
to belong to the same "group", meaning that if at least one theorem in 

26718  766 
this group is used, the other theorems in the same group are no longer 
767 
reported as unused. Moreover, if all theorems in the group are 

768 
unused, only one theorem in the group is displayed. 

769 

770 
Note that proof objects have to be switched on in order for 

771 
unused_thms to work properly (i.e. !proofs must be >= 1, which is 

26874  772 
usually the case when using Proof General with the default settings). 
26681  773 

26650  774 
* Authentic naming of facts disallows adhoc overwriting of previous 
775 
theorems within the same name space. INCOMPATIBILITY, need to remove 

776 
duplicate fact bindings, or even accidental fact duplications. Note 

777 
that tools may maintain dynamically scoped facts systematically, using 

778 
PureThy.add_thms_dynamic. 

779 

26660  780 
* Command 'hide' now allows to hide from "fact" name space as well. 
781 

26496
49ae9456eba9
purely functional setup of claset/simpset/clasimpset;
wenzelm
parents:
26495
diff
changeset

782 
* Eliminated destructive theorem database, simpset, claset, and 
49ae9456eba9
purely functional setup of claset/simpset/clasimpset;
wenzelm
parents:
26495
diff
changeset

783 
clasimpset. Potential INCOMPATIBILITY, really need to observe linear 
49ae9456eba9
purely functional setup of claset/simpset/clasimpset;
wenzelm
parents:
26495
diff
changeset

784 
update of theories within ML code. 
26479  785 

26955
ebbaa935eae0
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm
parents:
26925
diff
changeset

786 
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory. 
ebbaa935eae0
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm
parents:
26925
diff
changeset

787 
INCOMPATIBILITY, objectlogics depending on former Pure require 
ebbaa935eae0
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm
parents:
26925
diff
changeset

788 
additional setup PureThy.old_appl_syntax_setup; objectlogics 
ebbaa935eae0
* Eliminated theory ProtoPure and CPure, leaving just one Pure theory.
wenzelm
parents:
26925
diff
changeset

789 
depending on former CPure need to refer to Pure. 
26650  790 

26495  791 
* Commands 'use' and 'ML' are now purely functional, operating on 
26479  792 
theory/local_theory. Removed former 'ML_setup' (on theory), use 'ML' 
793 
instead. Added 'ML_val' as mere diagnostic replacement for 'ML'. 

794 
INCOMPATIBILITY. 

795 

26874  796 
* Command 'setup': discontinued implicit version with ML reference. 
26434  797 

25970
9053fd546501
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs here;
wenzelm
parents:
25961
diff
changeset

798 
* Instantiation target allows for simultaneous specification of class 
9053fd546501
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs here;
wenzelm
parents:
25961
diff
changeset

799 
instance operations together with an instantiation proof. 
9053fd546501
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs here;
wenzelm
parents:
25961
diff
changeset

800 
Typechecking phase allows to refer to class operations uniformly. 
27067  801 
See src/HOL/Complex/Complex.thy for an Isar example and 
802 
src/HOL/Library/Eval.thy for an ML example. 

25502  803 

26201
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

804 
* Indexing of literal facts: be more serious about including only 
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

805 
facts from the visible specification/proof context, but not the 
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

806 
background context (locale etc.). Affects `prop` notation and method 
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

807 
"fact". INCOMPATIBILITY: need to name facts explicitly in rare 
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

808 
situations. 
d3363a854708
indexing literal facts: exclude background context;
wenzelm
parents:
26197
diff
changeset

809 

26925
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

810 
* Method "cases", "induct", "coinduct": removed obsolete/undocumented 
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

811 
"(open)" option, which used to expose internal bound variables to the 
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

812 
proof text. 
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

813 

ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

814 
* Isar statements: removed obsolete case "rule_context". 
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

815 
INCOMPATIBILITY, better use explicit fixes/assumes. 
ce964f0df281
* Method "cases", "induct", "coinduct": removed obsolete "(open)" option;
wenzelm
parents:
26920
diff
changeset

816 

26874  817 
* Locale proofs: default proof step now includes 'unfold_locales'; 
818 
hence 'proof' without argument may be used to unfold locale 

819 
predicates. 

26765  820 

821 

26762  822 
*** Document preparation *** 
823 

26914  824 
* Simplified pdfsetup.sty: color/hyperref is used unconditionally for 
825 
both pdf and dvi (hyperlinks usually work in xdvi as well); removed 

826 
obsolete thumbpdf setup (contemporary PDF viewers do this on the 

827 
spot); renamed link color from "darkblue" to "linkcolor" (default 

26920  828 
value unchanged, can be redefined via \definecolor); no longer sets 
829 
"a4paper" option (unnecessary or even intrusive). 

26914  830 

27008  831 
* Antiquotation @{lemma A method} proves proposition A by the given 
832 
method (either a method name or a method name plus (optional) method 

833 
arguments in parentheses) and prints A just like @{prop A}. 

26762  834 

835 

25464
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

836 
*** HOL *** 
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

837 

27067  838 
* New primrec package. Specification syntax conforms in style to 
839 
definition/function/.... No separate induction rule is provided. The 

840 
"primrec" command distinguishes oldstyle and newstyle specifications 

841 
by syntax. The former primrec package is now named OldPrimrecPackage. 

842 
When adjusting theories, beware: constants stemming from newstyle 

843 
primrec specifications have authentic syntax. 

844 

845 
* Metis prover is now an order of magnitude faster, and also works 

846 
with multithreading. 

847 

848 
* Metis: the maximum number of clauses that can be produced from a 

849 
theorem is now given by the attribute max_clauses. Theorems that 

850 
exceed this number are ignored, with a warning printed. 

851 

852 
* Sledgehammer no longer produces structured proofs by default. To 

853 
enable, declare [[sledgehammer_full = true]]. Attributes 

854 
reconstruction_modulus, reconstruction_sorts renamed 

855 
sledgehammer_modulus, sledgehammer_sorts. INCOMPATIBILITY. 

856 

27104
791607529f6d
rep_datatype command now takes list of constructors as input arguments
haftmann
parents:
27067
diff
changeset

857 
* Method "induct_scheme" derives userspecified induction rules 
27067  858 
from wellfounded induction and completeness of patterns. This factors 
859 
out some operations that are done internally by the function package 

860 
and makes them available separately. See 

861 
src/HOL/ex/Induction_Scheme.thy for examples. 

862 

863 
* More flexible generation of measure functions for termination 

864 
proofs: Measure functions can be declared by proving a rule of the 

865 
form "is_measure f" and giving it the [measure_function] attribute. 

866 
The "is_measure" predicate is logically meaningless (always true), and 

867 
just guides the heuristic. To find suitable measure functions, the 

868 
termination prover sets up the goal "is_measure ?f" of the appropriate 

869 
type and generates all solutions by prologstyle backwards proof using 

870 
the declared rules. 

871 

872 
This setup also deals with rules like 

873 

874 
"is_measure f ==> is_measure (list_size f)" 

875 

876 
which accommodates nested datatypes that recurse through lists. 

877 
Similar rules are predeclared for products and option types. 

878 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

879 
* Turned the type of sets "'a set" into an abbreviation for "'a => bool" 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

880 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

881 
INCOMPATIBILITIES: 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

882 

27008  883 
 Definitions of overloaded constants on sets have to be replaced by 
884 
definitions on => and bool. 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

885 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

886 
 Some definitions of overloaded operators on sets can now be proved 
27008  887 
using the definitions of the operators on => and bool. Therefore, 
888 
the following theorems have been renamed: 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

889 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

890 
subset_def > subset_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

891 
psubset_def > psubset_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

892 
set_diff_def > set_diff_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

893 
Compl_def > Compl_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

894 
Sup_set_def > Sup_set_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

895 
Inf_set_def > Inf_set_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

896 
sup_set_def > sup_set_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

897 
inf_set_def > inf_set_eq 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

898 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

899 
 Due to the incompleteness of the HO unification algorithm, some 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

900 
rules such as subst may require manual instantiation, if some of 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

901 
the unknowns in the rule is a set. 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

902 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

903 
 Higher order unification and forward proofs: 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

904 
The proof pattern 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

905 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

906 
have "P (S::'a set)" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

907 
then have "EX S. P S" .. 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

908 

27008  909 
no longer works (due to the incompleteness of the HO unification 
910 
algorithm) and must be replaced by the pattern 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

911 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

912 
have "EX S. P S" 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

913 
proof 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

914 
show "P S" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

915 
qed 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

916 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

917 
 Calculational reasoning with subst (or similar rules): 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

918 
The proof pattern 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

919 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

920 
have "P (S::'a set)" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

921 
also have "S = T" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

922 
finally have "P T" . 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

923 

27008  924 
no longer works (for similar reasons as the previous example) and 
925 
must be replaced by something like 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

926 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

927 
have "P (S::'a set)" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

928 
moreover have "S = T" <...> 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

929 
ultimately have "P T" by simp 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

930 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

931 
 Tactics or packages written in ML code: 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

932 
Code performing pattern matching on types via 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

933 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

934 
Type ("set", [T]) => ... 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

935 

27008  936 
must be rewritten. Moreover, functions like strip_type or 
937 
binder_types no longer return the right value when applied to a 

938 
type of the form 

26964
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

939 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

940 
T1 => ... => Tn => U => bool 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

941 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

942 
rather than 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

943 

df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

944 
T1 => ... => Tn => U set 
df1f238a05f7
Added entry explaining incompatibilities introduced by replacing sets by predicates.
berghofe
parents:
26955
diff
changeset

945 

26874  946 
* Merged theories Wellfounded_Recursion, Accessible_Part and 
27067  947 
Wellfounded_Relations to theory Wellfounded. 
26748
4d51ddd6aa5c
Merged theories about wellfoundedness into one: Wellfounded.thy
krauss
parents:
26724
diff
changeset

948 

26513  949 
* Explicit class "eq" for executable equality. INCOMPATIBILITY. 
950 

26874  951 
* Class finite no longer treats UNIV as class parameter. Use class 
952 
enum from theory Library/Enum instead to achieve a similar effect. 

26445  953 
INCOMPATIBILITY. 
954 

26874  955 
* Theory List: rule list_induct2 now has explicitly named cases "Nil" 
956 
and "Cons". INCOMPATIBILITY. 

957 

26422
d5883907c514
HOL (and FOL): renamed variables in rules imp_elim and swap;
wenzelm
parents:
26401
diff
changeset

958 
* HOL (and FOL): renamed variables in rules imp_elim and swap. 
d5883907c514
HOL (and FOL): renamed variables in rules imp_elim and swap;
wenzelm
parents:
26401
diff
changeset

959 
Potential INCOMPATIBILITY. 
d5883907c514
HOL (and FOL): renamed variables in rules imp_elim and swap;
wenzelm
parents:
26401
diff
changeset

960 

26874  961 
* Theory Product_Type: duplicated lemmas split_Pair_apply and 
962 
injective_fst_snd removed, use split_eta and prod_eqI instead. 

963 
Renamed upd_fst to apfst and upd_snd to apsnd. INCOMPATIBILITY. 

26355  964 

26335
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

965 
* Theory Nat: removed redundant lemmas that merely duplicate lemmas of 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

966 
the same name in theory Orderings: 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

967 

961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

968 
less_trans 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

969 
less_linear 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

970 
le_imp_less_or_eq 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

971 
le_less_trans 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

972 
less_le_trans 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

973 
less_not_sym 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

974 
less_asym 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

975 

961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

976 
Renamed less_imp_le to less_imp_le_nat, and less_irrefl to 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

977 
less_irrefl_nat. Potential INCOMPATIBILITY due to more general types 
961bbcc9d85b
removed redundant Nat.less_not_sym, Nat.less_asym;
wenzelm
parents:
26333
diff
changeset

978 
and different variable names. 
26315
cb3badaa192e
removed redundant less_trans, less_linear, le_imp_less_or_eq, le_less_trans, less_le_trans (cf. Orderings.thy);
wenzelm
parents:
26231
diff
changeset

979 

26231  980 
* Library/Option_ord.thy: Canonical order on option type. 
981 

27008  982 
* Library/RBT.thy: Redblack trees, an efficient implementation of 
983 
finite maps. 

26197  984 

26231  985 
* Library/Countable.thy: Type class for countable types. 
986 

26180
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

987 
* Theory Int: The representation of numerals has changed. The infix 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

988 
operator BIT and the bit datatype with constructors B0 and B1 have 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

989 
disappeared. INCOMPATIBILITY, use "Int.Bit0 x" and "Int.Bit1 y" in 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

990 
place of "x BIT bit.B0" and "y BIT bit.B1", respectively. Theorems 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

991 
involving BIT, B0, or B1 have been renamed with "Bit0" or "Bit1" 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

992 
accordingly. 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

993 

cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

994 
* Theory Nat: definition of <= and < on natural numbers no longer 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

995 
depend on wellfounded relations. INCOMPATIBILITY. Definitions 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

996 
le_def and less_def have disappeared. Consider lemmas not_less 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

997 
[symmetric, where ?'a = nat] and less_eq [symmetric] instead. 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

998 

cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

999 
* Theory Finite_Set: locales ACf, ACe, ACIf, ACIfSL and ACIfSLlin 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1000 
(whose purpose mainly is for various fold_set functionals) have been 
26874  1001 
abandoned in favor of the existing algebraic classes 
26180
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1002 
ab_semigroup_mult, comm_monoid_mult, ab_semigroup_idem_mult, 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1003 
lower_semilattice (resp. upper_semilattice) and linorder. 
26139  1004 
INCOMPATIBILITY. 
26041
c2e15e65165f
locales ACf, ACIf, ACIfSL and ACIfSLlin have been abandoned in favour of the existing algebraic classes ab_semigroup_mult, ab_semigroup_idem_mult, lower_semilattice (resp. uper_semilattice) and linorder
haftmann
parents:
26013
diff
changeset

1005 

26180
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1006 
* Theory Transitive_Closure: induct and cases rules now declare proper 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1007 
case_names ("base" and "step"). INCOMPATIBILITY. 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1008 

cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1009 
* Theorem Inductive.lfp_ordinal_induct generalized to complete 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1010 
lattices. The form setspecific version is available as 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1011 
Inductive.lfp_ordinal_induct_set. 
26013
8764a1f1253b
Theorem Inductive.lfp_ordinal_induct generalized to complete lattices
haftmann
parents:
26006
diff
changeset

1012 

26874  1013 
* Renamed theorems "power.simps" to "power_int.simps". 
27067  1014 
INCOMPATIBILITY. 
25961  1015 

26180
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1016 
* Class semiring_div provides basic abstract properties of semirings 
25942  1017 
with division and modulo operations. Subsumes former class dvd_mod. 
1018 

26180
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1019 
* Merged theories IntDef, Numeral and IntArith into unified theory 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1020 
Int. INCOMPATIBILITY. 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1021 

cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1022 
* Theory Library/Code_Index: type "index" now represents natural 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1023 
numbers rather than integers. INCOMPATIBILITY. 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1024 

cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1025 
* New class "uminus" with operation "uminus" (split of from class 
cc85eaab20f6
Transitive_Closure: induct and cases rules now declare proper case_names;
wenzelm
parents:
26139
diff
changeset

1026 
"minus" which now only has operation "minus", binary). 
25919
8b1c0d434824
joined theories IntDef, Numeral, IntArith to theory Int
haftmann
parents:
25900
diff
changeset

1027 
INCOMPATIBILITY. 
8b1c0d434824
joined theories IntDef, Numeral, IntArith to theory Int
haftmann
parents:
25900
diff
changeset

1028 

25522  1029 
* Constants "card", "internal_split", "option_map" now with authentic 
25919
8b1c0d434824
joined theories IntDef, Numeral, IntArith to theory Int
haftmann
parents:
25900
diff
changeset

1030 
syntax. INCOMPATIBILITY. 
25522  1031 

1032 
* Definitions subset_def, psubset_def, set_diff_def, Compl_def, 

1033 
le_bool_def, less_bool_def, le_fun_def, less_fun_def, inf_bool_def, 

1034 
sup_bool_def, Inf_bool_def, Sup_bool_def, inf_fun_def, sup_fun_def, 

1035 
Inf_fun_def, Sup_fun_def, inf_set_def, sup_set_def, Inf_set_def, 

1036 
Sup_set_def, le_def, less_def, option_map_def now with object 

25919
8b1c0d434824
joined theories IntDef, Numeral, IntArith to theory Int
haftmann
parents:
25900
diff
changeset

1037 
equality. INCOMPATIBILITY. 
25464
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

1038 

25705  1039 
* Records. Removed K_record, and replaced it by pure lambda term 
25726
9728f319ffc6
* Metis prover an order of magnitude faster, works with multithreading.
wenzelm
parents:
25712
diff
changeset

1040 
%x. c. The simplifier setup is now more robust against eta expansion. 
25705  1041 
INCOMPATIBILITY: in cases explicitly referring to K_record. 
25464
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

1042 

27067  1043 
* Library/Multiset: {#a, b, c#} abbreviates {#a#} + {#b#} + {#c#}. 
1044 

1045 
* Library/ListVector: new theory of arithmetic vector operations. 

1046 

1047 
* Library/Order_Relation: new theory of various orderings as sets of 

1048 
pairs. Defines preorders, partial orders, linear orders and 

1049 
wellorders on sets and on types. 

26877  1050 

25726
9728f319ffc6
* Metis prover an order of magnitude faster, works with multithreading.
wenzelm
parents:
25712
diff
changeset

1051 

26197  1052 
*** ZF *** 
1053 

26874  1054 
* Renamed some theories to allow to loading both ZF and HOL in the 
1055 
same session: 

1056 

1057 
Datatype > Datatype_ZF 

1058 
Inductive > Inductive_ZF 

1059 
Int > Int_ZF 

1060 
IntDiv > IntDiv_ZF 

1061 
Nat > Nat_ZF 

1062 
List > List_ZF 

1063 
Main > Main_ZF 

1064 

1065 
INCOMPATIBILITY: ZF theories that import individual theories below 

1066 
Main might need to be adapted. Regular theory Main is still 

1067 
available, as trivial extension of Main_ZF. 

26197  1068 

1069 

25737
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1070 
*** ML *** 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1071 

27067  1072 
* ML within Isar: antiquotation @{const name} or @{const 
1073 
name(typargs)} produces staticallychecked Const term. 

1074 

26401
e7a94081dce7
Functor NamedThmsFun: data is available to the user as dynamic fact;
wenzelm
parents:
26387
diff
changeset

1075 
* Functor NamedThmsFun: data is available to the user as dynamic fact 
26724
ff6ff3a9010e
NamedThmsFun: removed obsolete print command  facts are accesible via dynamic name;
wenzelm
parents:
26718
diff
changeset

1076 
(of the same name). Removed obsolete print command. 
26401
e7a94081dce7
Functor NamedThmsFun: data is available to the user as dynamic fact;
wenzelm
parents:
26387
diff
changeset

1077 

27067  1078 
* Removed obsolete "use_legacy_bindings" function. 
26188  1079 

25737
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1080 
* The ``print mode'' is now a threadlocal value derived from a global 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1081 
template (the former print_mode reference), thus access becomes 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1082 
noncritical. The global print_mode reference is for session 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1083 
management only; usercode should use print_mode_value, 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1084 
print_mode_active, PrintMode.setmp etc. INCOMPATIBILITY. 
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1085 

26874  1086 
* Functions system/system_out provide a robust way to invoke external 
29161
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

1087 
shell commands, with propagation of interrupts (requires Poly/ML 
9903e84a9c9c
* Proofs of are run in parallel on multicore systems;
wenzelm
parents:
29145
diff
changeset

1088 
5.2.1). Do not use OS.Process.system etc. from the basis library! 
26222
edf6473ac9e9
* system/system_out provides a robust way to invoke external shell
wenzelm
parents:
26218
diff
changeset

1089 

25737
84c92fc48e36
``print mode'' is now a threadlocal value derived from a global template;
wenzelm
parents:
25726
diff
changeset

1090 

25626
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1091 
*** System *** 
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1092 

25971  1093 
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs  
1094 
in accordance with Proof General 3.7, which prefers GNU emacs. 

25970
9053fd546501
* Default settings: PROOFGENERAL_OPTIONS no longer impose xemacs here;
wenzelm
parents:
25961
diff
changeset

1095 

25626
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1096 
* isatool tty runs Isabelle process with plain tty interaction; 
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1097 
optional line editor may be specified via ISABELLE_LINE_EDITOR 
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1098 
setting, the default settings attempt to locate "ledit" and "rlwrap". 
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1099 

25651  1100 
* isatool browser now works with Cygwin as well, using general 
1101 
"javapath" function defined in Isabelle process environment. 

1102 

27067  1103 
* YXML notation provides a simple and efficient alternative to 
1104 
standard XML transfer syntax. See src/Pure/General/yxml.ML and 

1105 
isatool yxml as described in the Isabelle system manual. 

25651  1106 

25652  1107 
* JVM class isabelle.IsabelleProcess (located in Isabelle/lib/classes) 
25651  1108 
provides general wrapper for managing an Isabelle process in a robust 
1109 
fashion, with ``cooked'' output from stdin/stderr. 

1110 

25855  1111 
* Rudimentary Isabelle plugin for jEdit (see Isabelle/lib/jedit), 
1112 
based on Isabelle/JVM process wrapper (see Isabelle/lib/classes). 

1113 

27067  1114 
* Removed obsolete THIS_IS_ISABELLE_BUILD feature. NB: the documented 
1115 
way of changing the user's settings is via 

1116 
ISABELLE_HOME_USER/etc/settings, which is a fully featured bash 

1117 
script. 

1118 

1119 
* Multithreading.max_threads := 0 refers to the number of actual CPU 

1120 
cores of the underlying machine, which is a good starting point for 

1121 
optimal performance tuning. The corresponding usedir option M allows 

1122 
"max" as an alias for "0". WARNING: does not work on certain versions 

1123 
of Mac OS (with Poly/ML 5.1). 

1124 

1125 
* isabelleprocess: nonML sessions are run with "nice", to reduce the 

1126 
adverse effect of Isabelle flooding interactive frontends (notably 

1127 
ProofGeneral / XEmacs). 

1128 

25626
3000965b1fdf
* isatool tty runs Isabelle process with plain tty interaction;
wenzelm
parents:
25609
diff
changeset

1129 

25464
0ca80ce89001
moved new NEWS from Isabelle2007 to this Isabelle version'';
wenzelm
parents:
25459
diff
changeset

1130 

25429  1131 
New in Isabelle2007 (November 2007) 
1132 
 

17754
58a306d9f736
* Command 'find_theorems': support * wildcard in name: criterion.
wenzelm
parents:
17725
diff
changeset

1133 

58a306d9f736
* Command 'find_theorems': support * wildcard in name: criterion.
wenzelm
parents:
17725
diff
changeset

1134 
*** General *** 
58a306d9f736
* Command 'find_theorems': support * wildcard in name: criterion.
wenzelm
parents:
17725
diff
changeset

1135 

22826  1136 
* More uniform information about legacy features, notably a 
1137 
warning/error of "Legacy feature: ...", depending on the state of the 

23367  1138 
tolerate_legacy_features flag (default true). FUTURE INCOMPATIBILITY: 
1139 
legacy features will disappear eventually. 

22826  1140 

17918
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1141 
* Theory syntax: the header format ``theory A = B + C:'' has been 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1142 
discontinued in favour of ``theory A imports B C begin''. Use isatool 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1143 
fixheaders to convert existing theory files. INCOMPATIBILITY. 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1144 

93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1145 
* Theory syntax: the old nonIsar theory file format has been 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1146 
discontinued altogether. Note that ML proof scripts may still be used 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1147 
with Isar theories; migration is usually quite simple with the ML 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1148 
function use_legacy_bindings. INCOMPATIBILITY. 
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1149 

22871  1150 
* Theory syntax: some popular names (e.g. 'class', 'declaration', 
1151 
'fun', 'help', 'if') are now keywords. INCOMPATIBILITY, use double 

1152 
quotes. 

19814
faa698d46686
* Theory syntax: some popular names (e.g. "class", "if") are now keywords.
wenzelm
parents:
19783
diff
changeset

1153 

23888
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1154 
* Theory loader: be more serious about observing the static theory 
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1155 
header specifications (including optional directories), but not the 
24172
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1156 
accidental file locations of previously successful loads. The strict 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1157 
update policy of former update_thy is now already performed by 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1158 
use_thy, so the former has been removed; use_thys updates several 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1159 
theories simultaneously, just as 'imports' within a theory header 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1160 
specification, but without merging the results. Potential 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1161 
INCOMPATIBILITY: may need to refine theory headers and commands 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
24110
diff
changeset

1162 
ROOT.ML which depend on load order. 
23888
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1163 

babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1164 
* Theory loader: optional support for contentbased file 
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1165 
identification, instead of the traditional scheme of full physical 
23889  1166 
path plus date stamp; configured by the ISABELLE_FILE_IDENT setting 
23888
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1167 
(cf. the system manual). The new scheme allows to work with 
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1168 
nonfinished theories in persistent session images, such that source 
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1169 
files may be moved later on without requiring reloads. 
babe337cce2d
* Theory loader: be more serious about observing the static theory header specifications;
wenzelm
parents:
23881
diff
changeset

1170 

24187
8bdf5ca5871f
* Theory loader: oldstyle ML proof scripts are considered a legacy feature;
wenzelm
parents:
24172
diff
changeset

1171 
* Theory loader: oldstyle ML proof scripts being *attached* to a thy 
8bdf5ca5871f
* Theory loader: oldstyle ML proof scripts are considered a legacy feature;
wenzelm
parents:
24172
diff
changeset

1172 
file (with the same base name as the theory) are considered a legacy 
24800  1173 
feature, which will disappear eventually. Even now, the theory loader 
1174 
no longer maintains dependencies on such files. 

1175 

1176 
* Syntax: the scope for resolving ambiguities via typeinference is 

1177 
now limited to individual terms, instead of whole simultaneous 

24234
4714e04fb8e9
* Syntax: scope for resolving ambiguities via typeinference is now limited to individual terms;
wenzelm
parents:
24213
diff
changeset

1178 
specifications as before. This greatly reduces the complexity of the 
4714e04fb8e9
* Syntax: scope for resolving ambiguities via typeinference is now limited to individual terms;
wenzelm
parents:
24213
diff
changeset

1179 
syntax module and improves flexibility by separating parsing and 
4714e04fb8e9
* Syntax: scope for resolving ambiguities via typeinference is now limited to individual terms;
wenzelm
parents:
24213
diff
changeset

1180 
typechecking. INCOMPATIBILITY: additional typeconstraints (explicit 
4714e04fb8e9
* Syntax: scope for resolving ambiguities via typeinference is now limited to individual terms;
wenzelm
parents:
24213
diff
changeset

1181 
'fixes' etc.) are required in rare situations. 
4714e04fb8e9
* Syntax: scope for resolving ambiguities via typeinference is now limited to individual terms;
wenzelm
parents:
24213
diff
changeset

1182 

25034  1183 
* Syntax: constants introduced by newstyle packages ('definition', 
1184 
'abbreviation' etc.) are passed through the syntax module in 

1185 
``authentic mode''. This means that associated mixfix annotations 

1186 
really stick to such constants, independently of potential name space 

1187 
ambiguities introduced later on. INCOMPATIBILITY: constants in parse 

1188 
trees are represented slightly differently, may need to adapt syntax 

1189 
translations accordingly. Use CONST marker in 'translations' and 

1190 
@{const_syntax} antiquotation in 'parse_translation' etc. 

1191 

17981
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1192 
* Legacy goal package: reduced interface to the bare minimum required 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1193 
to keep existing proof scripts running. Most other userlevel 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1194 
functions are now part of the OldGoals structure, which is *not* open 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1195 
by default (consider isatool expandshort before open OldGoals). 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1196 
Removed top_sg, prin, printyp, pprint_term/typ altogether, because 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1197 
these tend to cause confusion about the actual goal (!) context being 
2602be0d99ae
* Legacy goal package: reduced interface to the bare minimum required to keep existing proof scripts running.
wenzelm
parents:
17918
diff
changeset

1198 
used here, which is not necessarily the same as the_context(). 
17918
93e26302733e
* Theory syntax: discontinued nonIsar format and old Isar headers;
wenzelm
parents:
17890
diff
changeset

1199 

23379
d0e3f790bd73
updated 'find_theorems'  moved ProofGeneral specifics to ProofGeneral/CHANGES;
wenzelm
parents:
23377
diff
changeset

1200 
* Command 'find_theorems': supports "*" wildcard in "name:" 
d0e3f790bd73
updated 'find_theorems'  moved ProofGeneral specifics to ProofGeneral/CHANGES;
wenzelm
parents:
23377
diff
changeset

1201 
criterion; "with_dups" option. Certain ProofGeneral versions might 
d0e3f790bd73
updated 'find_theorems'  moved ProofGeneral specifics to ProofGeneral/CHANGES;
wenzelm
parents:
23377
diff
changeset

1202 
support a specific search form (see ProofGeneral/CHANGES). 
22965  1203 

20370  1204 
* The ``prems limit'' option (cf. ProofContext.prems_limit) is now 1 
1205 
by default, which means that "prems" (and also "fixed variables") are 

1206 
suppressed from proof state output. Note that the ProofGeneral 

1207 
settings mechanism allows to change and save options persistently, but 

1208 
older versions of Isabelle will fail to start up if a negative prems 

1209 
limit is imposed. 

1210 

21308
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1211 
* Local theory targets may be specified by nonnested blocks of 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1212 
``context/locale/class ... begin'' followed by ``end''. The body may 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1213 
contain definitions, theorems etc., including any derived mechanism 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1214 
that has been implemented on top of these primitives. This concept 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1215 
generalizes the existing ``theorem (in ...)'' towards more versatility 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1216 
and scalability. 
73883a528b26
* Local theory targets ``context/locale/class ... begin'' followed by ``end''.
wenzelm
parents:
21265
diff
changeset

1217 

21960
0574f192b78a
* Proof General: proper undo of final 'end'; discontinued Isabelle/classic;
wenzelm
parents:
21896
diff
changeset

1218 
* Proof General interface: proper undo of final 'end' command; 
0574f192b78a
* Proof General: proper undo of final 'end'; discontinued Isabelle/classic;
wenzelm
parents:
21896
diff
changeset

1219 
discontinued Isabelle/classic mode (ML proof scripts). 
0574f192b78a
* Proof General: proper undo of final 'end'; discontinued Isabelle/classic;
wenzelm
parents:
21896
diff
changeset

1220 

17754
58a306d9f736
* Command 'find_theorems': support * wildcard in name: criterion.
wenzelm
parents:
17725
diff
changeset

1221 

17865  1222 
*** Document preparation *** 
1223 

21717  1224 
* Added antiquotation @{theory name} which prints the given name, 
1225 
after checking that it refers to a valid ancestor theory in the 

1226 
current context. 

21339  1227 

17869  1228 
* Added antiquotations @{ML_type text} and @{ML_struct text} which 
1229 
check the given source text as ML type/structure, printing verbatim. 

17865  1230 

21717  1231 
* Added antiquotation @{abbrev "c args"} which prints the abbreviation 
1232 
"c args == rhs" given in the current context. (Any number of 

21735  1233 
arguments may be given on the LHS.) 
21717  1234 

1235 

17779  1236 
*** Pure *** 
1237 

24800  1238 
* The 'class' package offers a combination of axclass and locale to 
25129  1239 
achieve Haskelllike type classes in Isabelle. Definitions and 
1240 
theorems within a class context produce both relative results (with 

1241 
implicit parameters according to the locale context), and polymorphic 

1242 
constants with qualified polymorphism (according to the class 

1243 
context). Within the body context of a 'class' target, a separate 

1244 
syntax layer ("user space type system") takes care of converting 

1245 
between global polymorphic consts and internal locale representation. 

25177  1246 
See src/HOL/ex/Classpackage.thy for examples (as well as main HOL). 
25184  1247 
"isatool doc classes" provides a tutorial. 
20807  1248 

25199  1249 
* Generic code generator framework allows to generate executable 
24800  1250 
code for ML and Haskell (including Isabelle classes). A short usage 
1251 
sketch: 

20188
8b22026445af
added notes on class_package.ML and codegen_package.ML
haftmann
parents:
20169
diff
changeset

1252 

8b22026445af
added notes on class_package.ML and codegen_package.ML
haftmann
parents:
20169
diff
changeset

1253 
internal compilation: 
25199  1254 
export_code <list of constants (term syntax)> in SML 
20453
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1255 
writing SML code to a file: 
25199  1256 
export_code <list of constants (term syntax)> in SML <filename> 
22735  1257 
writing OCaml code to a file: 
25199  1258 
export_code <list of constants (term syntax)> in OCaml <filename> 
20188
8b22026445af
added notes on class_package.ML and codegen_package.ML
haftmann
parents:
20169
diff
changeset

1259 
writing Haskell code to a bunch of files: 
25199  1260 
export_code <list of constants (term syntax)> in Haskell <filename> 
1261 

1262 
evaluating closed propositions to True/False using code generation: 

25184  1263 
method ``eval'' 
1264 

1265 
Reasonable default setup of framework in HOL. 

20453
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1266 

855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1267 
Theorem attributs for selecting and transforming function equations theorems: 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1268 

22845  1269 
[code fun]: select a theorem as function equation for a specific constant 
1270 
[code fun del]: deselect a theorem as function equation for a specific constant 

1271 
[code inline]: select an equation theorem for unfolding (inlining) in place 

1272 
[code inline del]: deselect an equation theorem for unfolding (inlining) in place 

20453
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1273 

22735  1274 
Userdefined serializations (target in {SML, OCaml, Haskell}): 
20453
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1275 

855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1276 
code_const <andlist of constants (term syntax)> 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1277 
{(target) <andlist of const target syntax>}+ 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1278 

855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1279 
code_type <andlist of type constructors> 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1280 
{(target) <andlist of type target syntax>}+ 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1281 

855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1282 
code_instance <andlist of instances> 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1283 
{(target)}+ 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1284 
where instance ::= <type constructor> :: <class> 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1285 

855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1286 
code_class <and_list of classes> 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1287 
{(target) <andlist of class target syntax>}+ 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1288 
where class target syntax ::= <class name> {where {<classop> == <target syntax>}+}? 
855f07fabd76
final syntax for some Isar code generator keywords
haftmann
parents:
20375
diff
changeset

1289 

25199  1290 
code_instance and code_class only are effective to target Haskell. 
22735  1291 

25177  1292 
For example usage see src/HOL/ex/Codegenerator.thy and 
1293 
src/HOL/ex/Codegenerator_Pretty.thy. A separate tutorial on code 

24800  1294 
generation from Isabelle/HOL theories is available via "isatool doc 
1295 
codegen". 

20188
8b22026445af
added notes on class_package.ML and codegen_package.ML
haftmann
parents:
20169
diff
changeset

1296 

25129  1297 
* Code generator: consts in 'consts_code' Isar commands are now 
1298 
referred to by usual term syntax (including optional type 

1299 
annotations). 

1300 

19254  1301 
* Command 'no_translations' removes translation rules from theory 
1302 
syntax. 

1303 

19625
285771cec083
* Pure: overloaded definitions are now actually checked for acyclic dependencies;
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1304 
* Overloaded definitions are now actually checked for acyclic 
19714  1305 
dependencies. The overloading scheme is slightly more general than 
1306 
that of Haskell98, although Isabelle does not demand an exact 

1307 
correspondence to type class and instance declarations. 

1308 
INCOMPATIBILITY, use ``defs (unchecked overloaded)'' to admit more 

1309 
exotic versions of overloading  at the discretion of the user! 

19711  1310 

1311 
Polymorphic constants are represented via type arguments, i.e. the 

1312 
instantiation that matches an instance against the most general 

1313 
declaration given in the signature. For example, with the declaration 

1314 
c :: 'a => 'a => 'a, an instance c :: nat => nat => nat is represented 

1315 
as c(nat). Overloading is essentially simultaneous structural 

1316 
recursion over such type arguments. Incomplete specification patterns 

19714  1317 
impose global constraints on all occurrences, e.g. c('a * 'a) on the 
19715  1318 
LHS means that more general c('a * 'b) will be disallowed on any RHS. 
19714  1319 
Command 'print_theory' outputs the normalized system of recursive 
1320 
equations, see section "definitions". 

19625
285771cec083
* Pure: overloaded definitions are now actually checked for acyclic dependencies;
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1321 

24086  1322 
* Configuration options are maintained within the theory or proof 
1323 
context (with name and type bool/int/string), providing a very simple 

1324 
interface to a poorman's version of general context data. Tools may 

24110
4ab3084e311c
tuned config options: eliminated separate attribute "option";
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diff
changeset

1325 
declare options in ML (e.g. using Attrib.config_int) and then refer to 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
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diff
changeset

1326 
these values using Config.get etc. Users may change options via an 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
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diff
changeset

1327 
associated attribute of the same name. This form of context 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
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diff
changeset

1328 
declaration works particularly well with commands 'declare' or 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
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parents:
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diff
changeset

1329 
'using', for example ``declare [[foo = 42]]''. Thus it has become 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
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diff
changeset

1330 
very easy to avoid global references, which would not observe Isar 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
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diff
changeset

1331 
toplevel undo/redo and fail to work with multithreading. 
24086  1332 

24172
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1333 
Various global ML references of Pure and HOL have been turned into 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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parents:
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diff
changeset

1334 
configuration options: 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
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diff
changeset

1335 

06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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parents:
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diff
changeset

1336 
Unify.search_bound unify_search_bound 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1337 
Unify.trace_bound unify_trace_bound 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1338 
Unify.trace_simp unify_trace_simp 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1339 
Unify.trace_types unify_trace_types 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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parents:
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diff
changeset

1340 
Simplifier.simp_depth_limit simp_depth_limit 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1341 
Blast.depth_limit blast_depth_limit 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
wenzelm
parents:
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diff
changeset

1342 
DatatypeProp.dtK datatype_distinctness_limit 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1343 
fast_arith_neq_limit fast_arith_neq_limit 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1344 
fast_arith_split_limit fast_arith_split_limit 
06e42cf7df4e
theory loader: added use_thys, removed obsolete update_thy;
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diff
changeset

1345 

24086  1346 
* Named collections of theorems may be easily installed as context 
24800  1347 
data using the functor NamedThmsFun (see also 
24086  1348 
src/Pure/Tools/named_thms.ML). The user may add or delete facts via 
24110
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
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diff
changeset

1349 
attributes; there is also a toplevel print command. This facility is 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
24086
diff
changeset

1350 
just a common case of general context data, which is the preferred way 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
24086
diff
changeset

1351 
for anything more complex than just a list of facts in canonical 
4ab3084e311c
tuned config options: eliminated separate attribute "option";
wenzelm
parents:
24086
diff
changeset

1352 
order. 
24086  1353 

24032  1354 
* Isar: command 'declaration' augments a local theory by generic 
1355 
declaration functions written in ML. This enables arbitrary content 

1356 
being added to the context, depending on a morphism that tells the 

1357 
difference of the original declaration context wrt. the application 

1358 
context encountered later on. 

1359 

1360 
* Isar: proper interfaces for simplification procedures. Command 

1361 
'simproc_setup' declares named simprocs (with match patterns, and body 

1362 
text in ML). Attribute "simproc" adds/deletes simprocs in the current 

1363 
context. ML antiquotation @{simproc name} retrieves named simprocs. 

1364 

1365 
* Isar: an extra pair of brackets around attribute declarations 

1366 
abbreviates a theorem reference involving an internal dummy fact, 

1367 
which will be ignored later  only the effect of the attribute on 

1368 
the background context will persist. This form of inplace 

1369 
declarations is particularly useful with commands like 'declare' and 

1370 
'using', for example ``have A using [[simproc a]] by simp''. 

1371 

23369
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
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diff
changeset

1372 
* Isar: method "assumption" (and implicit closing of subproofs) now 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1373 
takes simple nonatomic goal assumptions into account: after applying 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1374 
an assumption as a rule the resulting subgoals are solved by atomic 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1375 
assumption steps. This is particularly useful to finish 'obtain' 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1376 
goals, such as "!!x. (!!x. P x ==> thesis) ==> P x ==> thesis", 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1377 
without referring to the original premise "!!x. P x ==> thesis" in the 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1378 
Isar proof context. POTENTIAL INCOMPATIBILITY: method "assumption" is 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1379 
more permissive. 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1380 

227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1381 
* Isar: implicit use of prems from the Isar proof context is 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1382 
considered a legacy feature. Common applications like ``have A .'' 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1383 
may be replaced by ``have A by fact'' or ``note `A`''. In general, 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1384 
referencing facts explicitly here improves readability and 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1385 
maintainability of proof texts. 
227c51012cdb
* Isar: method "assumption" (implicit closing of subproofs) takes nonatomic goal assumptions into account;
wenzelm
parents:
23367
diff
changeset

1386 

17865  1387 
* Isar: improper proof element 'guess' is like 'obtain', but derives 
1388 
the obtained context from the course of reasoning! For example: 

1389 

1390 
assume "EX x y. A x & B y"  "any previous fact" 