author | wenzelm |
Mon, 20 Sep 2021 23:15:02 +0200 | |
changeset 74333 | a9b20bc32fa6 |
parent 73846 | 9447668d1b77 |
child 74338 | 534b231ce041 |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/local_theory.ML |
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Author: Makarius |
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Local theory operations, with abstract target context. |
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*) |
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type local_theory = Proof.context; |
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type generic_theory = Context.generic; |
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structure Attrib = |
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struct |
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type binding = binding * Token.src list; |
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type thms = (thm list * Token.src list) list; |
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type fact = binding * thms; |
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end; |
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structure Locale = |
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struct |
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type registration = {inst: string * morphism, mixin: (morphism * bool) option, export: morphism}; |
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end; |
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signature LOCAL_THEORY = |
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sig |
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type operations |
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val assert: local_theory -> local_theory |
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val level: Proof.context -> int |
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val map_contexts: (int -> Proof.context -> Proof.context) -> local_theory -> local_theory |
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val background_naming_of: local_theory -> Name_Space.naming |
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val map_background_naming: (Name_Space.naming -> Name_Space.naming) -> |
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local_theory -> local_theory |
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val restore_background_naming: local_theory -> local_theory -> local_theory |
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val full_name: local_theory -> binding -> string |
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val new_group: local_theory -> local_theory |
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val reset_group: local_theory -> local_theory |
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val standard_morphism: local_theory -> Proof.context -> morphism |
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val standard_morphism_theory: local_theory -> morphism |
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val standard_form: local_theory -> Proof.context -> (morphism -> 'a) -> 'a |
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val raw_theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory |
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val raw_theory: (theory -> theory) -> local_theory -> local_theory |
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val background_theory_result: (theory -> 'a * theory) -> local_theory -> 'a * local_theory |
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val background_theory: (theory -> theory) -> local_theory -> local_theory |
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val target_of: local_theory -> Proof.context |
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val target: (Proof.context -> Proof.context) -> local_theory -> local_theory |
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val target_morphism: local_theory -> morphism |
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val propagate_ml_env: generic_theory -> generic_theory |
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val operations_of: local_theory -> operations |
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val define: (binding * mixfix) * (Attrib.binding * term) -> local_theory -> |
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(term * (string * thm)) * local_theory |
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val define_internal: (binding * mixfix) * (Attrib.binding * term) -> local_theory -> |
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(term * (string * thm)) * local_theory |
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val note: Attrib.binding * thm list -> local_theory -> (string * thm list) * local_theory |
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val notes: Attrib.fact list -> local_theory -> (string * thm list) list * local_theory |
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val notes_kind: string -> Attrib.fact list -> local_theory -> |
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(string * thm list) list * local_theory |
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val abbrev: Syntax.mode -> (binding * mixfix) * term -> local_theory -> |
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(term * term) * local_theory |
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val declaration: {syntax: bool, pervasive: bool} -> declaration -> local_theory -> local_theory |
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val theory_registration: Locale.registration -> local_theory -> local_theory |
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val locale_dependency: Locale.registration -> local_theory -> local_theory |
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val pretty: local_theory -> Pretty.T list |
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val add_thms_dynamic: binding * (Context.generic -> thm list) -> local_theory -> local_theory |
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val set_defsort: sort -> local_theory -> local_theory |
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val syntax: bool -> Syntax.mode -> (string * typ * mixfix) list -> |
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local_theory -> local_theory |
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val syntax_cmd: bool -> Syntax.mode -> (string * string * mixfix) list -> |
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local_theory -> local_theory |
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val type_notation: bool -> Syntax.mode -> (typ * mixfix) list -> local_theory -> local_theory |
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val notation: bool -> Syntax.mode -> (term * mixfix) list -> local_theory -> local_theory |
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val type_alias: binding -> string -> local_theory -> local_theory |
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val const_alias: binding -> string -> local_theory -> local_theory |
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val init: {background_naming: Name_Space.naming, setup: theory -> Proof.context, |
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conclude: local_theory -> Proof.context} -> operations -> theory -> local_theory |
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val exit: local_theory -> Proof.context |
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val exit_global: local_theory -> theory |
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val exit_result: (morphism -> 'a -> 'b) -> 'a * local_theory -> 'b * Proof.context |
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val exit_result_global: (morphism -> 'a -> 'b) -> 'a * local_theory -> 'b * theory |
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val begin_nested: local_theory -> Binding.scope * local_theory |
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val end_nested: local_theory -> local_theory |
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val end_nested_result: (morphism -> 'a -> 'b) -> 'a * local_theory -> 'b * local_theory |
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end; |
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signature PRIVATE_LOCAL_THEORY = |
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sig |
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include LOCAL_THEORY |
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val reset: local_theory -> local_theory |
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end |
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structure Local_Theory: PRIVATE_LOCAL_THEORY = |
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struct |
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(** local theory data **) |
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(* type lthy *) |
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type operations = |
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refined Local_Theory.define vs. Local_Theory.define_internal, which allows to pass alternative name to the foundational axiom -- expecially important for 'instantiation' or 'overloading', which loose name information due to Long_Name.base_name cooking etc.;
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{define: bool -> (binding * mixfix) * (Attrib.binding * term) -> local_theory -> |
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(term * (string * thm)) * local_theory, |
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notes: string -> Attrib.fact list -> local_theory -> (string * thm list) list * local_theory, |
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abbrev: Syntax.mode -> (binding * mixfix) * term -> local_theory -> |
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(term * term) * local_theory, |
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declaration: {syntax: bool, pervasive: bool} -> declaration -> local_theory -> local_theory, |
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theory_registration: Locale.registration -> local_theory -> local_theory, |
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locale_dependency: Locale.registration -> local_theory -> local_theory, |
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pretty: local_theory -> Pretty.T list}; |
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type lthy = |
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{background_naming: Name_Space.naming, |
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operations: operations, |
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conclude: Proof.context -> Proof.context, |
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target: Proof.context}; |
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fun make_lthy (background_naming, operations, conclude, target) : lthy = |
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{background_naming = background_naming, operations = operations, |
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conclude = conclude, target = target}; |
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(* context data *) |
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structure Data = Proof_Data |
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( |
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type T = lthy list; |
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fun init _ = []; |
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); |
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(* nested structure *) |
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val level = length o Data.get; (*1: main target at bottom, >= 2: nested target context*) |
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fun assert lthy = |
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if level lthy = 0 then error "Missing local theory context" else lthy; |
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fun assert_bottom lthy = |
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let |
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val _ = assert lthy; |
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in |
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if level lthy > 1 then error "Not at bottom of local theory nesting" |
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else lthy |
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end; |
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fun assert_not_bottom lthy = |
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let |
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val _ = assert lthy; |
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in |
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if level lthy = 1 then error "Already at bottom of local theory nesting" |
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else lthy |
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end; |
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val bottom_of = List.last o Data.get o assert; |
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val top_of = hd o Data.get o assert; |
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fun map_top f = |
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assert #> |
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Data.map (fn {background_naming, operations, conclude, target} :: parents => |
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make_lthy (f (background_naming, operations, conclude, target)) :: parents); |
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fun reset lthy = #target (top_of lthy) |> Data.put (Data.get lthy); |
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159 |
fun map_contexts f lthy = |
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let val n = level lthy in |
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161 |
lthy |> (Data.map o map_index) |
72953 | 162 |
(fn (i, {background_naming, operations, conclude, target}) => |
163 |
make_lthy (background_naming, operations, conclude, |
|
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164 |
target |
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165 |
|> Context_Position.set_visible false |
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166 |
|> f (n - i - 1) |
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167 |
|> Context_Position.restore_visible target)) |
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168 |
|> f n |
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169 |
end; |
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170 |
|
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171 |
|
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172 |
(* naming for background theory *) |
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173 |
|
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174 |
val background_naming_of = #background_naming o top_of; |
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175 |
|
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176 |
fun map_background_naming f = |
72953 | 177 |
map_top (fn (background_naming, operations, conclude, target) => |
178 |
(f background_naming, operations, conclude, target)); |
|
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179 |
|
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180 |
val restore_background_naming = map_background_naming o K o background_naming_of; |
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181 |
|
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182 |
val full_name = Name_Space.full_name o background_naming_of; |
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183 |
|
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184 |
val new_group = map_background_naming Name_Space.new_group; |
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185 |
val reset_group = map_background_naming Name_Space.reset_group; |
33276 | 186 |
|
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187 |
|
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188 |
(* standard morphisms *) |
18767 | 189 |
|
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190 |
fun standard_morphism lthy ctxt = |
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191 |
Proof_Context.norm_export_morphism lthy ctxt $> |
54740 | 192 |
Morphism.binding_morphism "Local_Theory.standard_binding" |
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193 |
(Name_Space.transform_binding (Proof_Context.naming_of lthy)); |
18767 | 194 |
|
63270 | 195 |
fun standard_morphism_theory lthy = |
196 |
standard_morphism lthy (Proof_Context.init_global (Proof_Context.theory_of lthy)); |
|
197 |
||
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198 |
fun standard_form lthy ctxt x = |
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199 |
Morphism.form (Morphism.transform (standard_morphism lthy ctxt) x); |
18767 | 200 |
|
201 |
||
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202 |
(* background theory *) |
19661 | 203 |
|
20960 | 204 |
fun raw_theory_result f lthy = |
205 |
let |
|
42360 | 206 |
val (res, thy') = f (Proof_Context.theory_of lthy); |
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207 |
val lthy' = map_contexts (K (Proof_Context.transfer thy')) lthy; |
20960 | 208 |
in (res, lthy') end; |
209 |
||
210 |
fun raw_theory f = #2 o raw_theory_result (f #> pair ()); |
|
211 |
||
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|
212 |
fun background_theory_result f lthy = |
59887 | 213 |
let |
214 |
val naming = |
|
215 |
background_naming_of lthy |
|
216 |
|> Name_Space.transform_naming (Proof_Context.naming_of lthy); |
|
217 |
in |
|
218 |
lthy |> raw_theory_result (fn thy => |
|
219 |
thy |
|
220 |
|> Sign.map_naming (K naming) |
|
221 |
|> f |
|
222 |
||> Sign.restore_naming thy) |
|
223 |
end; |
|
19661 | 224 |
|
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225 |
fun background_theory f = #2 o background_theory_result (f #> pair ()); |
19661 | 226 |
|
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227 |
|
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228 |
(* target contexts *) |
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229 |
|
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230 |
val target_of = #target o bottom_of; |
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|
231 |
|
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|
232 |
fun target f lthy = |
18744 | 233 |
let |
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234 |
val ctxt = target_of lthy; |
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235 |
val ctxt' = ctxt |
33383 | 236 |
|> Context_Position.set_visible false |
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237 |
|> f |
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238 |
|> Context_Position.restore_visible ctxt; |
42360 | 239 |
val thy' = Proof_Context.theory_of ctxt'; |
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|
240 |
in map_contexts (fn 0 => K ctxt' | _ => Proof_Context.transfer thy') lthy end; |
18876 | 241 |
|
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|
242 |
fun target_morphism lthy = standard_morphism lthy (target_of lthy); |
18767 | 243 |
|
37949
48a874444164
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|
244 |
fun propagate_ml_env (context as Context.Proof lthy) = |
68865
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|
245 |
let val inherit = ML_Env.inherit [context] in |
47064 | 246 |
lthy |
247 |
|> background_theory (Context.theory_map inherit) |
|
47245
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248 |
|> map_contexts (K (Context.proof_map inherit)) |
47064 | 249 |
|> Context.Proof |
250 |
end |
|
37949
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251 |
| propagate_ml_env context = context; |
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|
252 |
|
18767 | 253 |
|
47064 | 254 |
|
255 |
(** operations **) |
|
256 |
||
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|
257 |
val operations_of = #operations o top_of; |
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|
258 |
|
57938 | 259 |
fun operation f lthy = f (operations_of lthy) lthy; |
73846 | 260 |
fun operation1 f x = operation (fn ops => f ops x); |
57938 | 261 |
fun operation2 f x y = operation (fn ops => f ops x y); |
262 |
||
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|
263 |
|
47064 | 264 |
(* primitives *) |
18781 | 265 |
|
20888
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|
266 |
val pretty = operation #pretty; |
52788 | 267 |
val abbrev = operation2 #abbrev; |
268 |
val define = operation2 #define false; |
|
269 |
val define_internal = operation2 #define true; |
|
270 |
val notes_kind = operation2 #notes; |
|
271 |
val declaration = operation2 #declaration; |
|
73846 | 272 |
val theory_registration = operation1 #theory_registration; |
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|
273 |
fun locale_dependency registration = |
73846 | 274 |
assert_bottom #> operation1 #locale_dependency registration; |
18781 | 275 |
|
36451 | 276 |
|
57938 | 277 |
(* theorems *) |
36451 | 278 |
|
33670
02b7738aef6a
eliminated slightly odd kind argument of LocalTheory.note(s);
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|
279 |
val notes = notes_kind ""; |
02b7738aef6a
eliminated slightly odd kind argument of LocalTheory.note(s);
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changeset
|
280 |
fun note (a, ths) = notes [(a, [(ths, [])])] #>> the_single; |
18781 | 281 |
|
57929
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parents:
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changeset
|
282 |
fun add_thms_dynamic (binding, f) lthy = |
c5063c033a5a
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|
283 |
lthy |
c5063c033a5a
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|
284 |
|> background_theory_result (fn thy => thy |
c5063c033a5a
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|
285 |
|> Global_Theory.add_thms_dynamic' (Sign.inherit_naming thy lthy) (binding, f)) |
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|
286 |
|-> (fn name => |
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|
287 |
map_contexts (fn _ => fn ctxt => |
c5063c033a5a
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changeset
|
288 |
Proof_Context.transfer_facts (Proof_Context.theory_of ctxt) ctxt) #> |
c5063c033a5a
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changeset
|
289 |
declaration {syntax = false, pervasive = false} (fn phi => |
c5063c033a5a
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|
290 |
let val binding' = Morphism.binding phi binding in |
c5063c033a5a
tuned signature -- proper Local_Theory.add_thms_dynamic;
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changeset
|
291 |
Context.mapping |
c5063c033a5a
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|
292 |
(Global_Theory.alias_fact binding' name) |
66246 | 293 |
(Proof_Context.alias_fact binding' name) |
57929
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|
294 |
end)); |
c5063c033a5a
tuned signature -- proper Local_Theory.add_thms_dynamic;
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changeset
|
295 |
|
57938 | 296 |
|
297 |
(* default sort *) |
|
298 |
||
36451 | 299 |
fun set_defsort S = |
45291
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changeset
|
300 |
declaration {syntax = true, pervasive = false} |
57cd50f98fdc
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diff
changeset
|
301 |
(K (Context.mapping (Sign.set_defsort S) (Proof_Context.set_defsort S))); |
36451 | 302 |
|
35738
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
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diff
changeset
|
303 |
|
74333 | 304 |
(* syntax *) |
305 |
||
306 |
fun gen_syntax prep_type add mode raw_args lthy = |
|
307 |
let |
|
308 |
val args = map (fn (c, T, mx) => (c, prep_type lthy T, mx)) raw_args; |
|
309 |
val args' = map (fn (c, T, mx) => (c, T, Mixfix.reset_pos mx)) args; |
|
310 |
val _ = lthy |> Context_Position.is_visible lthy ? Proof_Context.syntax add mode args; |
|
311 |
in |
|
312 |
declaration {syntax = true, pervasive = false} |
|
313 |
(fn _ => Proof_Context.generic_syntax add mode args') lthy |
|
314 |
end; |
|
315 |
||
316 |
val syntax = gen_syntax (K I); |
|
317 |
val syntax_cmd = gen_syntax Proof_Context.read_typ_syntax; |
|
318 |
||
319 |
||
35738
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
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parents:
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diff
changeset
|
320 |
(* notation *) |
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
wenzelm
parents:
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diff
changeset
|
321 |
|
35412
b8dead547d9e
more uniform treatment of syntax for types vs. consts;
wenzelm
parents:
33764
diff
changeset
|
322 |
fun type_notation add mode raw_args lthy = |
50741
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
323 |
let |
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
324 |
val args = map (apfst (Logic.type_map (Assumption.export_term lthy (target_of lthy)))) raw_args; |
62844 | 325 |
val args' = map (apsnd Mixfix.reset_pos) args; |
326 |
val _ = lthy |> Context_Position.is_visible lthy ? Proof_Context.type_notation add mode args; |
|
50741
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
327 |
in |
45291
57cd50f98fdc
uniform Local_Theory.declaration with explicit params;
wenzelm
parents:
42360
diff
changeset
|
328 |
declaration {syntax = true, pervasive = false} |
62844 | 329 |
(Proof_Context.generic_type_notation add mode args') lthy |
45291
57cd50f98fdc
uniform Local_Theory.declaration with explicit params;
wenzelm
parents:
42360
diff
changeset
|
330 |
end; |
35412
b8dead547d9e
more uniform treatment of syntax for types vs. consts;
wenzelm
parents:
33764
diff
changeset
|
331 |
|
24949 | 332 |
fun notation add mode raw_args lthy = |
50741
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
333 |
let |
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
334 |
val args = map (apfst (Assumption.export_term lthy (target_of lthy))) raw_args |
62844 | 335 |
val args' = map (apsnd Mixfix.reset_pos) args; |
336 |
val _ = lthy |> Context_Position.is_visible lthy ? Proof_Context.notation add mode args; |
|
50741
20e6e1a92e54
less aggressive Assumption.export_term (similar to Generic_Target.abbrev): merely expand local defs and thus allow notation for local fixes;
wenzelm
parents:
50739
diff
changeset
|
337 |
in |
45291
57cd50f98fdc
uniform Local_Theory.declaration with explicit params;
wenzelm
parents:
42360
diff
changeset
|
338 |
declaration {syntax = true, pervasive = false} |
62844 | 339 |
(Proof_Context.generic_notation add mode args') lthy |
45291
57cd50f98fdc
uniform Local_Theory.declaration with explicit params;
wenzelm
parents:
42360
diff
changeset
|
340 |
end; |
21743 | 341 |
|
21664
dd4e89123359
notation/abbreviation: more serious handling of morphisms;
wenzelm
parents:
21614
diff
changeset
|
342 |
|
35738
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
wenzelm
parents:
35412
diff
changeset
|
343 |
(* name space aliases *) |
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added Local_Theory.alias operations (independent of target);
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changeset
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344 |
|
57938 | 345 |
fun syntax_alias global_alias local_alias b name = |
45291
57cd50f98fdc
uniform Local_Theory.declaration with explicit params;
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diff
changeset
|
346 |
declaration {syntax = true, pervasive = false} (fn phi => |
35738
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added Local_Theory.alias operations (independent of target);
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parents:
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diff
changeset
|
347 |
let val b' = Morphism.binding phi b |
45298
aa35859c8741
uniform treatment of syntax declaration wrt. aux. context (NB: notation avoids duplicate mixfix internally);
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diff
changeset
|
348 |
in Context.mapping (global_alias b' name) (local_alias b' name) end); |
35738
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added Local_Theory.alias operations (independent of target);
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diff
changeset
|
349 |
|
57938 | 350 |
val type_alias = syntax_alias Sign.type_alias Proof_Context.type_alias; |
351 |
val const_alias = syntax_alias Sign.const_alias Proof_Context.const_alias; |
|
35738
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
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parents:
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diff
changeset
|
352 |
|
98fd035c3fe3
added Local_Theory.alias operations (independent of target);
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parents:
35412
diff
changeset
|
353 |
|
56055
8fe7414f00b1
slightly more rubust (and opportunistic) exit for old-fashioned theory_to_proof, which is used by global 'sublocale' with Named_Target.init but without proper exit;
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parents:
54740
diff
changeset
|
354 |
|
59890 | 355 |
(** manage targets **) |
36451 | 356 |
|
72153 | 357 |
(* main target *) |
20910 | 358 |
|
72517 | 359 |
fun init_target background_naming conclude operations target = |
72953 | 360 |
Data.map (K [make_lthy (background_naming, operations, conclude, target)]) target |
72516
17dc99589a91
unified Local_Theory.init with Generic_Target.init
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parents:
72505
diff
changeset
|
361 |
|
17dc99589a91
unified Local_Theory.init with Generic_Target.init
haftmann
parents:
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diff
changeset
|
362 |
fun init {background_naming, setup, conclude} operations thy = |
17dc99589a91
unified Local_Theory.init with Generic_Target.init
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parents:
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diff
changeset
|
363 |
thy |
17dc99589a91
unified Local_Theory.init with Generic_Target.init
haftmann
parents:
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diff
changeset
|
364 |
|> Sign.change_begin |
17dc99589a91
unified Local_Theory.init with Generic_Target.init
haftmann
parents:
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diff
changeset
|
365 |
|> setup |
17dc99589a91
unified Local_Theory.init with Generic_Target.init
haftmann
parents:
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diff
changeset
|
366 |
|> init_target background_naming (conclude #> target_of #> Sign.change_end_local) operations; |
20910 | 367 |
|
72517 | 368 |
val exit_of = #conclude o bottom_of; |
66335
a849ce33923d
treat exit separate from regular local theory operations
haftmann
parents:
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diff
changeset
|
369 |
|
72502 | 370 |
fun exit lthy = exit_of lthy (assert_bottom lthy); |
42360 | 371 |
val exit_global = Proof_Context.theory_of o exit; |
28395
984fcc8feb24
added exit_global, exit_result, exit_result_global;
wenzelm
parents:
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diff
changeset
|
372 |
|
72153 | 373 |
fun exit_result decl (x, lthy) = |
28395
984fcc8feb24
added exit_global, exit_result, exit_result_global;
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parents:
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diff
changeset
|
374 |
let |
984fcc8feb24
added exit_global, exit_result, exit_result_global;
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parents:
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diff
changeset
|
375 |
val ctxt = exit lthy; |
33281
223ef9bc399a
let naming transform binding beforehand -- covering only the "conceal" flag for now;
wenzelm
parents:
33276
diff
changeset
|
376 |
val phi = standard_morphism lthy ctxt; |
72153 | 377 |
in (decl phi x, ctxt) end; |
28395
984fcc8feb24
added exit_global, exit_result, exit_result_global;
wenzelm
parents:
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diff
changeset
|
378 |
|
72153 | 379 |
fun exit_result_global decl (x, lthy) = |
28395
984fcc8feb24
added exit_global, exit_result, exit_result_global;
wenzelm
parents:
28379
diff
changeset
|
380 |
let |
984fcc8feb24
added exit_global, exit_result, exit_result_global;
wenzelm
parents:
28379
diff
changeset
|
381 |
val thy = exit_global lthy; |
42360 | 382 |
val thy_ctxt = Proof_Context.init_global thy; |
33281
223ef9bc399a
let naming transform binding beforehand -- covering only the "conceal" flag for now;
wenzelm
parents:
33276
diff
changeset
|
383 |
val phi = standard_morphism lthy thy_ctxt; |
72153 | 384 |
in (decl phi x, thy) end; |
20910 | 385 |
|
59890 | 386 |
|
387 |
(* nested targets *) |
|
388 |
||
72450 | 389 |
fun begin_nested lthy = |
59890 | 390 |
let |
391 |
val _ = assert lthy; |
|
392 |
val (scope, target) = Proof_Context.new_scope lthy; |
|
72436
d62d84634b06
direct exit to theory when ending nested target on theory target
haftmann
parents:
72433
diff
changeset
|
393 |
val entry = make_lthy (background_naming_of lthy, operations_of lthy, |
72953 | 394 |
Proof_Context.restore_naming lthy, target); |
72153 | 395 |
val lthy' = Data.map (cons entry) target; |
59890 | 396 |
in (scope, lthy') end; |
397 |
||
72450 | 398 |
fun end_nested lthy = |
59890 | 399 |
let |
66259 | 400 |
val _ = assert_not_bottom lthy; |
72517 | 401 |
val ({conclude, ...} :: rest) = Data.get lthy; |
402 |
in lthy |> Data.put rest |> reset |> conclude end; |
|
59890 | 403 |
|
72450 | 404 |
fun end_nested_result decl (x, lthy) = |
405 |
let |
|
406 |
val outer_lthy = end_nested lthy; |
|
407 |
val phi = Proof_Context.export_morphism lthy outer_lthy; |
|
408 |
in (decl phi x, outer_lthy) end; |
|
409 |
||
18781 | 410 |
end; |