author | blanchet |
Thu, 16 Dec 2010 22:45:02 +0100 | |
changeset 41220 | 4d11b0de7dd8 |
parent 39997 | b654fa27fbc4 |
child 41254 | 78c3e472bb35 |
permissions | -rw-r--r-- |
256 | 1 |
(* Title: Pure/type.ML |
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2 |
Author: Tobias Nipkow, Lawrence C Paulson, and Markus Wenzel |
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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4 |
Type signatures and certified types, special treatment of type vars, |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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parents:
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5 |
matching and unification of types, extend and merge type signatures. |
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*) |
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||
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signature TYPE = |
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2964 | 9 |
sig |
39288 | 10 |
(*constraints*) |
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load type_infer.ML later -- proper context for Type_Infer.infer_types;
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11 |
val mark_polymorphic: typ -> typ |
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val constraint: typ -> term -> term |
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Type_Infer.preterm: eliminated separate Constraint;
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val strip_constraints: term -> term |
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common Type.appl_error, which also covers explicit constraints;
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14 |
val appl_error: Pretty.pp -> term -> typ -> term -> typ -> string |
14790
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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parents:
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(*type signatures and certified types*) |
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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16 |
datatype decl = |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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LogicalType of int | |
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Abbreviation of string list * typ * bool | |
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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19 |
Nonterminal |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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type tsig |
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added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
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21 |
val eq_tsig: tsig * tsig -> bool |
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0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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val rep_tsig: tsig -> |
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renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
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23 |
{classes: Name_Space.T * Sorts.algebra, |
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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default: sort, |
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eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
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types: decl Name_Space.table, |
26641 | 26 |
log_types: string list} |
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major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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parents:
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val empty_tsig: tsig |
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added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
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val class_space: tsig -> Name_Space.T |
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val class_alias: Name_Space.naming -> binding -> string -> tsig -> tsig |
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added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
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val intern_class: tsig -> xstring -> string |
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added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
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val extern_class: tsig -> string -> xstring |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
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val defaultS: tsig -> sort |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
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parents:
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val logical_types: tsig -> string list |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
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val eq_sort: tsig -> sort * sort -> bool |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
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val subsort: tsig -> sort * sort -> bool |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
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changeset
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val of_sort: tsig -> typ * sort -> bool |
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val inter_sort: tsig -> sort * sort -> sort |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
38 |
val cert_class: tsig -> class -> class |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
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changeset
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39 |
val cert_sort: tsig -> sort -> sort |
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val minimize_sort: tsig -> sort -> sort |
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witness_sorts: proper type witnesses for hyps, not invented "'hyp" variables;
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val witness_sorts: tsig -> (typ * sort) list -> sort list -> (typ * sort) list |
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type mode: models certification mode (default, syntax, abbrev);
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type mode |
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type mode: models certification mode (default, syntax, abbrev);
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val mode_default: mode |
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type mode: models certification mode (default, syntax, abbrev);
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val mode_syntax: mode |
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type mode: models certification mode (default, syntax, abbrev);
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45 |
val mode_abbrev: mode |
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val get_mode: Proof.context -> mode |
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val set_mode: mode -> Proof.context -> Proof.context |
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val restore_mode: Proof.context -> Proof.context -> Proof.context |
|
35669
a91c7ed801b8
added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
wenzelm
parents:
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diff
changeset
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49 |
val type_space: tsig -> Name_Space.T |
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val type_alias: Name_Space.naming -> binding -> string -> tsig -> tsig |
35669
a91c7ed801b8
added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
wenzelm
parents:
35359
diff
changeset
|
51 |
val intern_type: tsig -> xstring -> string |
a91c7ed801b8
added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
wenzelm
parents:
35359
diff
changeset
|
52 |
val extern_type: tsig -> string -> xstring |
a91c7ed801b8
added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
wenzelm
parents:
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changeset
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val is_logtype: tsig -> string -> bool |
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provide direct access to the different kinds of type declarations;
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val the_decl: tsig -> string -> decl |
24274
cb9236269af1
type mode: models certification mode (default, syntax, abbrev);
wenzelm
parents:
23655
diff
changeset
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val cert_typ_mode: mode -> tsig -> typ -> typ |
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val cert_typ: tsig -> typ -> typ |
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val arity_number: tsig -> string -> int |
58 |
val arity_sorts: Pretty.pp -> tsig -> string -> sort -> sort list |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
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59 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
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60 |
(*special treatment of type vars*) |
36621
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proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
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61 |
val sort_of_atyp: typ -> sort |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
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diff
changeset
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val strip_sorts: typ -> typ |
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val no_tvars: typ -> typ |
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renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
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val varify_global: (string * sort) list -> term -> ((string * sort) * indexname) list * term |
33832 | 65 |
val legacy_freeze_thaw_type: typ -> typ * (typ -> typ) |
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val legacy_freeze_type: typ -> typ |
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val legacy_freeze_thaw: term -> term * (term -> term) |
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val legacy_freeze: term -> term |
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|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
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diff
changeset
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70 |
(*matching and unification*) |
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exception TYPE_MATCH |
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type tyenv = (sort * typ) Vartab.table |
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val lookup: tyenv -> indexname * sort -> typ option |
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Correct chasing of type variable instantiations during type unification.
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val devar: tyenv -> typ -> typ |
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val typ_match: tsig -> typ * typ -> tyenv -> tyenv |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
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val typ_instance: tsig -> typ * typ -> bool |
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val raw_match: typ * typ -> tyenv -> tyenv |
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val raw_matches: typ list * typ list -> tyenv -> tyenv |
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val raw_instance: typ * typ -> bool |
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exception TUNIFY |
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val unify: tsig -> typ * typ -> tyenv * int -> tyenv * int |
82 |
val raw_unify: typ * typ -> tyenv -> tyenv |
|
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val raw_unifys: typ list * typ list -> tyenv -> tyenv |
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val could_unify: typ * typ -> bool |
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val could_unifys: typ list * typ list -> bool |
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val eq_type: tyenv -> typ * typ -> bool |
0 | 87 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
88 |
(*extend and merge type signatures*) |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
89 |
val add_class: Pretty.pp -> Name_Space.naming -> binding * class list -> tsig -> tsig |
26669 | 90 |
val hide_class: bool -> string -> tsig -> tsig |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
91 |
val set_defsort: sort -> tsig -> tsig |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
92 |
val add_type: Name_Space.naming -> binding * int -> tsig -> tsig |
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
93 |
val add_abbrev: Name_Space.naming -> binding * string list * typ -> tsig -> tsig |
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
94 |
val add_nonterminal: Name_Space.naming -> binding -> tsig -> tsig |
26669 | 95 |
val hide_type: bool -> string -> tsig -> tsig |
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build classes/arities: refer to operations in sorts.ML;
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96 |
val add_arity: Pretty.pp -> arity -> tsig -> tsig |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
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97 |
val add_classrel: Pretty.pp -> class * class -> tsig -> tsig |
36450 | 98 |
val merge_tsig: Pretty.pp -> tsig * tsig -> tsig |
2964 | 99 |
end; |
100 |
||
101 |
structure Type: TYPE = |
|
0 | 102 |
struct |
103 |
||
39288 | 104 |
(** constraints **) |
105 |
||
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load type_infer.ML later -- proper context for Type_Infer.infer_types;
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106 |
(*indicate polymorphic Vars*) |
44e4d8dfd6bf
load type_infer.ML later -- proper context for Type_Infer.infer_types;
wenzelm
parents:
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107 |
fun mark_polymorphic T = Type ("_polymorphic_", [T]); |
44e4d8dfd6bf
load type_infer.ML later -- proper context for Type_Infer.infer_types;
wenzelm
parents:
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diff
changeset
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108 |
|
39288 | 109 |
fun constraint T t = |
110 |
if T = dummyT then t |
|
111 |
else Const ("_type_constraint_", T --> T) $ t; |
|
112 |
||
39292
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Type_Infer.preterm: eliminated separate Constraint;
wenzelm
parents:
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diff
changeset
|
113 |
fun strip_constraints (Const ("_type_constraint_", _) $ t) = strip_constraints t |
6f085332c7d3
Type_Infer.preterm: eliminated separate Constraint;
wenzelm
parents:
39290
diff
changeset
|
114 |
| strip_constraints (t $ u) = strip_constraints t $ strip_constraints u |
6f085332c7d3
Type_Infer.preterm: eliminated separate Constraint;
wenzelm
parents:
39290
diff
changeset
|
115 |
| strip_constraints (Abs (x, T, t)) = Abs (x, T, strip_constraints t) |
6f085332c7d3
Type_Infer.preterm: eliminated separate Constraint;
wenzelm
parents:
39290
diff
changeset
|
116 |
| strip_constraints a = a; |
6f085332c7d3
Type_Infer.preterm: eliminated separate Constraint;
wenzelm
parents:
39290
diff
changeset
|
117 |
|
39289
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
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118 |
fun appl_error pp (Const ("_type_constraint_", Type ("fun", [T, _]))) _ u U = |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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diff
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119 |
cat_lines |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
120 |
["Failed to meet type constraint:", "", |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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changeset
|
121 |
Pretty.string_of (Pretty.block |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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diff
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122 |
[Pretty.str "Term:", Pretty.brk 2, Pretty.term pp u, |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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diff
changeset
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123 |
Pretty.str " ::", Pretty.brk 1, Pretty.typ pp U]), |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
124 |
Pretty.string_of (Pretty.block |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
125 |
[Pretty.str "Type:", Pretty.brk 2, Pretty.typ pp T])] |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
126 |
| appl_error pp t T u U = |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
127 |
cat_lines |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
128 |
["Type error in application: " ^ |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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diff
changeset
|
129 |
(case T of |
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common Type.appl_error, which also covers explicit constraints;
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diff
changeset
|
130 |
Type ("fun", _) => "incompatible operand type" |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
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parents:
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|
131 |
| _ => "operator not of function type"), |
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common Type.appl_error, which also covers explicit constraints;
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parents:
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|
132 |
"", |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
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diff
changeset
|
133 |
Pretty.string_of (Pretty.block |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
134 |
[Pretty.str "Operator:", Pretty.brk 2, Pretty.term pp t, |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
135 |
Pretty.str " ::", Pretty.brk 1, Pretty.typ pp T]), |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
136 |
Pretty.string_of (Pretty.block |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
137 |
[Pretty.str "Operand:", Pretty.brk 3, Pretty.term pp u, |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
138 |
Pretty.str " ::", Pretty.brk 1, Pretty.typ pp U])]; |
92b50c8bb67b
common Type.appl_error, which also covers explicit constraints;
wenzelm
parents:
39288
diff
changeset
|
139 |
|
39288 | 140 |
|
141 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
142 |
(** type signatures and certified types **) |
2964 | 143 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
144 |
(* type declarations *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
145 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
146 |
datatype decl = |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
147 |
LogicalType of int | |
14989 | 148 |
Abbreviation of string list * typ * bool | |
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149 |
Nonterminal; |
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150 |
|
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151 |
|
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152 |
(* type tsig *) |
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153 |
|
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datatype tsig = |
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TSig of { |
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classes: Name_Space.T * Sorts.algebra, (*order-sorted algebra of type classes*) |
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default: sort, (*default sort on input*) |
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types: decl Name_Space.table, (*declared types*) |
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log_types: string list}; (*logical types sorted by number of arguments*) |
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160 |
|
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fun eq_tsig |
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(TSig {classes = classes1, default = default1, types = types1, log_types = _}, |
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TSig {classes = classes2, default = default2, types = types2, log_types = _}) = |
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pointer_eq (classes1, classes2) andalso |
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default1 = default2 andalso |
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pointer_eq (types1, types2); |
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167 |
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fun rep_tsig (TSig comps) = comps; |
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169 |
|
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fun make_tsig (classes, default, types, log_types) = |
171 |
TSig {classes = classes, default = default, types = types, log_types = log_types}; |
|
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172 |
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fun build_tsig (classes, default, types) = |
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174 |
let |
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val log_types = |
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Symtab.fold (fn (c, LogicalType n) => cons (c, n) | _ => I) (snd types) [] |
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|> Library.sort (int_ord o pairself snd) |> map fst; |
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in make_tsig (classes, default, types, log_types) end; |
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|
26641 | 180 |
fun map_tsig f (TSig {classes, default, types, log_types = _}) = |
19642 | 181 |
build_tsig (f (classes, default, types)); |
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182 |
|
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val empty_tsig = |
33096 | 184 |
build_tsig ((Name_Space.empty "class", Sorts.empty_algebra), [], Name_Space.empty_table "type"); |
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185 |
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186 |
|
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187 |
(* classes and sorts *) |
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188 |
|
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val class_space = #1 o #classes o rep_tsig; |
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190 |
|
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fun class_alias naming binding name = map_tsig (fn ((space, classes), default, types) => |
192 |
((Name_Space.alias naming binding name space, classes), default, types)); |
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193 |
||
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val intern_class = Name_Space.intern o class_space; |
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val extern_class = Name_Space.extern o class_space; |
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196 |
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fun defaultS (TSig {default, ...}) = default; |
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fun logical_types (TSig {log_types, ...}) = log_types; |
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199 |
|
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fun eq_sort (TSig {classes, ...}) = Sorts.sort_eq (#2 classes); |
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fun subsort (TSig {classes, ...}) = Sorts.sort_le (#2 classes); |
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fun of_sort (TSig {classes, ...}) = Sorts.of_sort (#2 classes); |
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fun inter_sort (TSig {classes, ...}) = Sorts.inter_sort (#2 classes); |
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204 |
|
19642 | 205 |
fun cert_class (TSig {classes, ...}) = Sorts.certify_class (#2 classes); |
206 |
fun cert_sort (TSig {classes, ...}) = Sorts.certify_sort (#2 classes); |
|
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fun minimize_sort (TSig {classes, ...}) = Sorts.minimize_sort (#2 classes); |
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208 |
|
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fun witness_sorts (TSig {classes, log_types, ...}) = |
19642 | 210 |
Sorts.witness_sorts (#2 classes) log_types; |
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211 |
|
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212 |
|
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(* certification mode *) |
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214 |
|
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datatype mode = Mode of {normalize: bool, logical: bool}; |
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216 |
|
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val mode_default = Mode {normalize = true, logical = true}; |
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val mode_syntax = Mode {normalize = true, logical = false}; |
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val mode_abbrev = Mode {normalize = false, logical = false}; |
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220 |
|
33519 | 221 |
structure Mode = Proof_Data |
24484 | 222 |
( |
223 |
type T = mode; |
|
224 |
fun init _ = mode_default; |
|
225 |
); |
|
226 |
||
227 |
val get_mode = Mode.get; |
|
228 |
fun set_mode mode = Mode.map (K mode); |
|
229 |
fun restore_mode ctxt = set_mode (get_mode ctxt); |
|
230 |
||
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231 |
|
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232 |
(* types *) |
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233 |
|
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val type_space = #1 o #types o rep_tsig; |
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235 |
|
35680 | 236 |
fun type_alias naming binding name = map_tsig (fn (classes, default, (space, types)) => |
237 |
(classes, default, (Name_Space.alias naming binding name space, types))); |
|
238 |
||
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239 |
val intern_type = Name_Space.intern o type_space; |
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240 |
val extern_type = Name_Space.extern o type_space; |
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241 |
|
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val is_logtype = member (op =) o logical_types; |
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243 |
|
27313 | 244 |
|
245 |
fun undecl_type c = "Undeclared type constructor: " ^ quote c; |
|
246 |
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fun lookup_type (TSig {types = (_, types), ...}) = Symtab.lookup types; |
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fun the_decl tsig c = |
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(case lookup_type tsig c of |
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NONE => error (undecl_type c) |
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| SOME decl => decl); |
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253 |
|
27313 | 254 |
|
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255 |
(* certified types *) |
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256 |
|
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fun bad_nargs t = "Bad number of arguments for type constructor: " ^ quote t; |
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258 |
|
14998 | 259 |
local |
260 |
||
261 |
fun inst_typ env (Type (c, Ts)) = Type (c, map (inst_typ env) Ts) |
|
18957 | 262 |
| inst_typ env (T as TFree (x, _)) = the_default T (AList.lookup (op =) env x) |
14998 | 263 |
| inst_typ _ T = T; |
264 |
||
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265 |
in |
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266 |
|
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267 |
fun cert_typ_mode (Mode {normalize, logical}) tsig ty = |
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268 |
let |
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269 |
fun err msg = raise TYPE (msg, [ty], []); |
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270 |
|
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val check_logical = |
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if logical then fn c => err ("Illegal occurrence of syntactic type: " ^ quote c) |
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273 |
else fn _ => (); |
14989 | 274 |
|
275 |
fun cert (T as Type (c, Ts)) = |
|
276 |
let |
|
277 |
val Ts' = map cert Ts; |
|
278 |
fun nargs n = if length Ts <> n then err (bad_nargs c) else (); |
|
279 |
in |
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(case the_decl tsig c of |
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281 |
LogicalType n => (nargs n; Type (c, Ts')) |
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282 |
| Abbreviation (vs, U, syn) => |
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283 |
(nargs (length vs); |
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284 |
if syn then check_logical c else (); |
14993 | 285 |
if normalize then inst_typ (vs ~~ Ts') U |
14989 | 286 |
else Type (c, Ts')) |
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287 |
| Nonterminal => (nargs 0; check_logical c; T)) |
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288 |
end |
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289 |
| cert (TFree (x, S)) = TFree (x, cert_sort tsig S) |
14989 | 290 |
| cert (TVar (xi as (_, i), S)) = |
14993 | 291 |
if i < 0 then |
292 |
err ("Malformed type variable: " ^ quote (Term.string_of_vname xi)) |
|
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293 |
else TVar (xi, cert_sort tsig S); |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
294 |
|
14989 | 295 |
val ty' = cert ty; |
14993 | 296 |
in if ty = ty' then ty else ty' end; (*avoid copying of already normal type*) |
14830
faa4865ba1ce
removed norm_typ; improved output; refer to Pretty.pp;
wenzelm
parents:
14790
diff
changeset
|
297 |
|
24274
cb9236269af1
type mode: models certification mode (default, syntax, abbrev);
wenzelm
parents:
23655
diff
changeset
|
298 |
val cert_typ = cert_typ_mode mode_default; |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
299 |
|
14998 | 300 |
end; |
301 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
302 |
|
19464 | 303 |
(* type arities *) |
304 |
||
27302 | 305 |
fun arity_number tsig a = |
306 |
(case lookup_type tsig a of |
|
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
307 |
SOME (LogicalType n) => n |
19464 | 308 |
| _ => error (undecl_type a)); |
309 |
||
310 |
fun arity_sorts _ tsig a [] = replicate (arity_number tsig a) [] |
|
19642 | 311 |
| arity_sorts pp (TSig {classes, ...}) a S = Sorts.mg_domain (#2 classes) a S |
26641 | 312 |
handle Sorts.CLASS_ERROR err => error (Sorts.class_error pp err); |
19464 | 313 |
|
314 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
315 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
316 |
(** special treatment of type vars **) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
317 |
|
36621
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
318 |
(* sort_of_atyp *) |
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
319 |
|
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
320 |
fun sort_of_atyp (TFree (_, S)) = S |
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
321 |
| sort_of_atyp (TVar (_, S)) = S |
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
322 |
| sort_of_atyp T = raise TYPE ("sort_of_atyp", [T], []); |
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
323 |
|
2fd4e2c76636
proof terms for strip_shyps, based on the version by krauss/schropp with some notable differences:
wenzelm
parents:
36450
diff
changeset
|
324 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
325 |
(* strip_sorts *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
326 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
327 |
fun strip_sorts (Type (a, Ts)) = Type (a, map strip_sorts Ts) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
328 |
| strip_sorts (TFree (x, _)) = TFree (x, []) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
329 |
| strip_sorts (TVar (xi, _)) = TVar (xi, []); |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
330 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
331 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
332 |
(* no_tvars *) |
621 | 333 |
|
334 |
fun no_tvars T = |
|
29275
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
335 |
(case Term.add_tvarsT T [] of [] => T |
12501 | 336 |
| vs => raise TYPE ("Illegal schematic type variable(s): " ^ |
29275
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
337 |
commas_quote (map (Term.string_of_vname o #1) (rev vs)), [T], [])); |
621 | 338 |
|
7641 | 339 |
|
35845
e5980f0ad025
renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents:
35680
diff
changeset
|
340 |
(* varify_global *) |
621 | 341 |
|
35845
e5980f0ad025
renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents:
35680
diff
changeset
|
342 |
fun varify_global fixed t = |
621 | 343 |
let |
19305 | 344 |
val fs = Term.fold_types (Term.fold_atyps |
345 |
(fn TFree v => if member (op =) fixed v then I else insert (op =) v | _ => I)) t []; |
|
29260 | 346 |
val used = Name.context |
347 |
|> fold_types (fold_atyps (fn TVar ((a, _), _) => Name.declare a | _ => I)) t; |
|
348 |
val fmap = fs ~~ map (rpair 0) (#1 (Name.variants (map fst fs) used)); |
|
32784 | 349 |
fun thaw (f as (_, S)) = |
17184 | 350 |
(case AList.lookup (op =) fmap f of |
15531 | 351 |
NONE => TFree f |
16946 | 352 |
| SOME xi => TVar (xi, S)); |
21116 | 353 |
in (fmap, map_types (map_type_tfree thaw) t) end; |
2964 | 354 |
|
355 |
||
7641 | 356 |
(* freeze_thaw: freeze TVars in a term; return the "thaw" inverse *) |
3411
163f8f4a42d7
Removal of freeze_vars and thaw_vars. New freeze_thaw
paulson
parents:
3175
diff
changeset
|
357 |
|
7641 | 358 |
local |
359 |
||
16289 | 360 |
fun new_name (ix, (pairs, used)) = |
20071
8f3e1ddb50e6
replaced Term.variant(list) by Name.variant(_list);
wenzelm
parents:
19806
diff
changeset
|
361 |
let val v = Name.variant used (string_of_indexname ix) |
16289 | 362 |
in ((ix, v) :: pairs, v :: used) end; |
621 | 363 |
|
16289 | 364 |
fun freeze_one alist (ix, sort) = |
17184 | 365 |
TFree (the (AList.lookup (op =) alist ix), sort) |
15531 | 366 |
handle Option => |
3790 | 367 |
raise TYPE ("Failure during freezing of ?" ^ string_of_indexname ix, [], []); |
2964 | 368 |
|
17184 | 369 |
fun thaw_one alist (a, sort) = TVar (the (AList.lookup (op =) alist a), sort) |
16289 | 370 |
handle Option => TFree (a, sort); |
416 | 371 |
|
10495 | 372 |
in |
373 |
||
33832 | 374 |
fun legacy_freeze_thaw_type T = |
7641 | 375 |
let |
29275
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
376 |
val used = OldTerm.add_typ_tfree_names (T, []) |
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
377 |
and tvars = map #1 (OldTerm.add_typ_tvars (T, [])); |
23178 | 378 |
val (alist, _) = List.foldr new_name ([], used) tvars; |
7641 | 379 |
in (map_type_tvar (freeze_one alist) T, map_type_tfree (thaw_one (map swap alist))) end; |
380 |
||
33832 | 381 |
val legacy_freeze_type = #1 o legacy_freeze_thaw_type; |
16289 | 382 |
|
33832 | 383 |
fun legacy_freeze_thaw t = |
7641 | 384 |
let |
29275
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
385 |
val used = OldTerm.it_term_types OldTerm.add_typ_tfree_names (t, []) |
9fa69e3858d6
moved old add_type_XXX, add_term_XXX etc. to structure OldTerm;
wenzelm
parents:
29269
diff
changeset
|
386 |
and tvars = map #1 (OldTerm.it_term_types OldTerm.add_typ_tvars (t, [])); |
23178 | 387 |
val (alist, _) = List.foldr new_name ([], used) tvars; |
7641 | 388 |
in |
389 |
(case alist of |
|
390 |
[] => (t, fn x => x) (*nothing to do!*) |
|
20548
8ef25fe585a8
renamed Term.map_term_types to Term.map_types (cf. Term.fold_types);
wenzelm
parents:
20071
diff
changeset
|
391 |
| _ => (map_types (map_type_tvar (freeze_one alist)) t, |
8ef25fe585a8
renamed Term.map_term_types to Term.map_types (cf. Term.fold_types);
wenzelm
parents:
20071
diff
changeset
|
392 |
map_types (map_type_tfree (thaw_one (map swap alist))))) |
7641 | 393 |
end; |
394 |
||
33832 | 395 |
val legacy_freeze = #1 o legacy_freeze_thaw; |
16289 | 396 |
|
7641 | 397 |
end; |
398 |
||
256 | 399 |
|
400 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
401 |
(** matching and unification of types **) |
8899 | 402 |
|
15797 | 403 |
type tyenv = (sort * typ) Vartab.table; |
256 | 404 |
|
15797 | 405 |
fun tvar_clash ixn S S' = raise TYPE ("Type variable " ^ |
406 |
quote (Term.string_of_vname ixn) ^ " has two distinct sorts", |
|
407 |
[TVar (ixn, S), TVar (ixn, S')], []); |
|
0 | 408 |
|
26327 | 409 |
fun lookup tye (ixn, S) = |
17412 | 410 |
(case Vartab.lookup tye ixn of |
15797 | 411 |
NONE => NONE |
16289 | 412 |
| SOME (S', T) => if S = S' then SOME T else tvar_clash ixn S S'); |
413 |
||
0 | 414 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
415 |
(* matching *) |
0 | 416 |
|
2964 | 417 |
exception TYPE_MATCH; |
0 | 418 |
|
16946 | 419 |
fun typ_match tsig = |
2964 | 420 |
let |
39997 | 421 |
fun match (T0 as TVar (v, S), T) subs = |
26327 | 422 |
(case lookup subs (v, S) of |
15531 | 423 |
NONE => |
39997 | 424 |
if of_sort tsig (T, S) |
425 |
then if T0 = T then subs (*types already identical; don't create cycle!*) |
|
426 |
else Vartab.update_new (v, (S, T)) subs |
|
14993 | 427 |
else raise TYPE_MATCH |
15531 | 428 |
| SOME U => if U = T then subs else raise TYPE_MATCH) |
16340 | 429 |
| match (Type (a, Ts), Type (b, Us)) subs = |
2964 | 430 |
if a <> b then raise TYPE_MATCH |
16885 | 431 |
else matches (Ts, Us) subs |
16340 | 432 |
| match (TFree x, TFree y) subs = |
2964 | 433 |
if x = y then subs else raise TYPE_MATCH |
16885 | 434 |
| match _ _ = raise TYPE_MATCH |
435 |
and matches (T :: Ts, U :: Us) subs = matches (Ts, Us) (match (T, U) subs) |
|
436 |
| matches _ subs = subs; |
|
16946 | 437 |
in match end; |
0 | 438 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
439 |
fun typ_instance tsig (T, U) = |
16946 | 440 |
(typ_match tsig (U, T) Vartab.empty; true) handle TYPE_MATCH => false; |
441 |
||
442 |
(*purely structural matching*) |
|
443 |
fun raw_match (TVar (v, S), T) subs = |
|
26327 | 444 |
(case lookup subs (v, S) of |
17412 | 445 |
NONE => Vartab.update_new (v, (S, T)) subs |
16946 | 446 |
| SOME U => if U = T then subs else raise TYPE_MATCH) |
447 |
| raw_match (Type (a, Ts), Type (b, Us)) subs = |
|
448 |
if a <> b then raise TYPE_MATCH |
|
449 |
else raw_matches (Ts, Us) subs |
|
450 |
| raw_match (TFree x, TFree y) subs = |
|
451 |
if x = y then subs else raise TYPE_MATCH |
|
452 |
| raw_match _ _ = raise TYPE_MATCH |
|
453 |
and raw_matches (T :: Ts, U :: Us) subs = raw_matches (Ts, Us) (raw_match (T, U) subs) |
|
19694 | 454 |
| raw_matches ([], []) subs = subs |
455 |
| raw_matches _ _ = raise TYPE_MATCH; |
|
16946 | 456 |
|
457 |
fun raw_instance (T, U) = |
|
458 |
(raw_match (U, T) Vartab.empty; true) handle TYPE_MATCH => false; |
|
2964 | 459 |
|
0 | 460 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
461 |
(* unification *) |
2964 | 462 |
|
0 | 463 |
exception TUNIFY; |
464 |
||
26641 | 465 |
(*occurs check*) |
2964 | 466 |
fun occurs v tye = |
467 |
let |
|
468 |
fun occ (Type (_, Ts)) = exists occ Ts |
|
469 |
| occ (TFree _) = false |
|
15797 | 470 |
| occ (TVar (w, S)) = |
29269
5c25a2012975
moved term order operations to structure TermOrd (cf. Pure/term_ord.ML);
wenzelm
parents:
29260
diff
changeset
|
471 |
Term.eq_ix (v, w) orelse |
26327 | 472 |
(case lookup tye (w, S) of |
15531 | 473 |
NONE => false |
474 |
| SOME U => occ U); |
|
0 | 475 |
in occ end; |
476 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
477 |
(*chase variable assignments; if devar returns a type var then it must be unassigned*) |
16885 | 478 |
fun devar tye (T as TVar v) = |
26327 | 479 |
(case lookup tye v of |
16885 | 480 |
SOME U => devar tye U |
15531 | 481 |
| NONE => T) |
32784 | 482 |
| devar _ T = T; |
0 | 483 |
|
17804 | 484 |
(*order-sorted unification*) |
32784 | 485 |
fun unify (TSig {classes = (_, classes), ...}) TU (tyenv, maxidx) = |
2964 | 486 |
let |
32738 | 487 |
val tyvar_count = Unsynchronized.ref maxidx; |
488 |
fun gen_tyvar S = TVar ((Name.aT, Unsynchronized.inc tyvar_count), S); |
|
2964 | 489 |
|
19642 | 490 |
fun mg_domain a S = Sorts.mg_domain classes a S |
491 |
handle Sorts.CLASS_ERROR _ => raise TUNIFY; |
|
2964 | 492 |
|
16885 | 493 |
fun meet (_, []) tye = tye |
494 |
| meet (TVar (xi, S'), S) tye = |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
495 |
if Sorts.sort_le classes (S', S) then tye |
17412 | 496 |
else Vartab.update_new |
17221 | 497 |
(xi, (S', gen_tyvar (Sorts.inter_sort classes (S', S)))) tye |
16885 | 498 |
| meet (TFree (_, S'), S) tye = |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
499 |
if Sorts.sort_le classes (S', S) then tye |
2964 | 500 |
else raise TUNIFY |
16885 | 501 |
| meet (Type (a, Ts), S) tye = meets (Ts, mg_domain a S) tye |
502 |
and meets (T :: Ts, S :: Ss) tye = meets (Ts, Ss) (meet (devar tye T, S) tye) |
|
503 |
| meets _ tye = tye; |
|
2964 | 504 |
|
16885 | 505 |
fun unif (ty1, ty2) tye = |
506 |
(case (devar tye ty1, devar tye ty2) of |
|
2964 | 507 |
(T as TVar (v, S1), U as TVar (w, S2)) => |
29269
5c25a2012975
moved term order operations to structure TermOrd (cf. Pure/term_ord.ML);
wenzelm
parents:
29260
diff
changeset
|
508 |
if Term.eq_ix (v, w) then |
15797 | 509 |
if S1 = S2 then tye else tvar_clash v S1 S2 |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
510 |
else if Sorts.sort_le classes (S1, S2) then |
17412 | 511 |
Vartab.update_new (w, (S2, T)) tye |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
512 |
else if Sorts.sort_le classes (S2, S1) then |
17412 | 513 |
Vartab.update_new (v, (S1, U)) tye |
2964 | 514 |
else |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
515 |
let val S = gen_tyvar (Sorts.inter_sort classes (S1, S2)) in |
17412 | 516 |
Vartab.update_new (v, (S1, S)) (Vartab.update_new (w, (S2, S)) tye) |
2964 | 517 |
end |
518 |
| (TVar (v, S), T) => |
|
519 |
if occurs v tye T then raise TUNIFY |
|
17412 | 520 |
else meet (T, S) (Vartab.update_new (v, (S, T)) tye) |
2964 | 521 |
| (T, TVar (v, S)) => |
522 |
if occurs v tye T then raise TUNIFY |
|
17412 | 523 |
else meet (T, S) (Vartab.update_new (v, (S, T)) tye) |
2964 | 524 |
| (Type (a, Ts), Type (b, Us)) => |
525 |
if a <> b then raise TUNIFY |
|
16885 | 526 |
else unifs (Ts, Us) tye |
527 |
| (T, U) => if T = U then tye else raise TUNIFY) |
|
528 |
and unifs (T :: Ts, U :: Us) tye = unifs (Ts, Us) (unif (T, U) tye) |
|
529 |
| unifs _ tye = tye; |
|
530 |
in (unif TU tyenv, ! tyvar_count) end; |
|
0 | 531 |
|
16946 | 532 |
(*purely structural unification*) |
533 |
fun raw_unify (ty1, ty2) tye = |
|
534 |
(case (devar tye ty1, devar tye ty2) of |
|
32784 | 535 |
(T as TVar (v, S1), TVar (w, S2)) => |
29269
5c25a2012975
moved term order operations to structure TermOrd (cf. Pure/term_ord.ML);
wenzelm
parents:
29260
diff
changeset
|
536 |
if Term.eq_ix (v, w) then |
16946 | 537 |
if S1 = S2 then tye else tvar_clash v S1 S2 |
17412 | 538 |
else Vartab.update_new (w, (S2, T)) tye |
16946 | 539 |
| (TVar (v, S), T) => |
540 |
if occurs v tye T then raise TUNIFY |
|
17412 | 541 |
else Vartab.update_new (v, (S, T)) tye |
16946 | 542 |
| (T, TVar (v, S)) => |
543 |
if occurs v tye T then raise TUNIFY |
|
17412 | 544 |
else Vartab.update_new (v, (S, T)) tye |
16946 | 545 |
| (Type (a, Ts), Type (b, Us)) => |
546 |
if a <> b then raise TUNIFY |
|
547 |
else raw_unifys (Ts, Us) tye |
|
548 |
| (T, U) => if T = U then tye else raise TUNIFY) |
|
549 |
and raw_unifys (T :: Ts, U :: Us) tye = raw_unifys (Ts, Us) (raw_unify (T, U) tye) |
|
19696 | 550 |
| raw_unifys ([], []) tye = tye |
551 |
| raw_unifys _ _ = raise TUNIFY; |
|
16946 | 552 |
|
17804 | 553 |
(*fast unification filter*) |
554 |
fun could_unify (Type (a, Ts), Type (b, Us)) = a = b andalso could_unifys (Ts, Us) |
|
555 |
| could_unify (TFree (a, _), TFree (b, _)) = a = b |
|
556 |
| could_unify (TVar _, _) = true |
|
557 |
| could_unify (_, TVar _) = true |
|
558 |
| could_unify _ = false |
|
559 |
and could_unifys (T :: Ts, U :: Us) = could_unify (T, U) andalso could_unifys (Ts, Us) |
|
19696 | 560 |
| could_unifys ([], []) = true |
561 |
| could_unifys _ = false; |
|
450 | 562 |
|
17804 | 563 |
|
564 |
(*equality with respect to a type environment*) |
|
32030 | 565 |
fun equal_type tye (T, T') = |
16885 | 566 |
(case (devar tye T, devar tye T') of |
16650 | 567 |
(Type (s, Ts), Type (s', Ts')) => |
32030 | 568 |
s = s' andalso ListPair.all (equal_type tye) (Ts, Ts') |
16650 | 569 |
| (U, U') => U = U'); |
570 |
||
32030 | 571 |
fun eq_type tye = |
572 |
if Vartab.is_empty tye then op = else equal_type tye; |
|
573 |
||
450 | 574 |
|
0 | 575 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
576 |
(** extend and merge type signatures **) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
577 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
578 |
(* classes *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
579 |
|
16370
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
580 |
fun add_class pp naming (c, cs) tsig = |
19642 | 581 |
tsig |> map_tsig (fn ((space, classes), default, types) => |
16370
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
582 |
let |
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
583 |
val cs' = map (cert_class tsig) cs |
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
584 |
handle TYPE (msg, _, _) => error msg; |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
585 |
val (c', space') = space |> Name_Space.declare true naming c; |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
586 |
val classes' = classes |> Sorts.add_class pp (c', cs'); |
19642 | 587 |
in ((space', classes'), default, types) end); |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
588 |
|
26669 | 589 |
fun hide_class fully c = map_tsig (fn ((space, classes), default, types) => |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
590 |
((Name_Space.hide fully c space, classes), default, types)); |
16370
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
591 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
592 |
|
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
593 |
(* arities *) |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
594 |
|
19642 | 595 |
fun add_arity pp (t, Ss, S) tsig = tsig |> map_tsig (fn ((space, classes), default, types) => |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
596 |
let |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
597 |
val _ = |
27302 | 598 |
(case lookup_type tsig t of |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
599 |
SOME (LogicalType n) => if length Ss <> n then error (bad_nargs t) else () |
33094
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
600 |
| SOME _ => error ("Logical type constructor expected: " ^ quote t) |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
601 |
| NONE => error (undecl_type t)); |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
602 |
val (Ss', S') = (map (cert_sort tsig) Ss, cert_sort tsig S) |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
603 |
handle TYPE (msg, _, _) => error msg; |
19642 | 604 |
val classes' = classes |> Sorts.add_arities pp ((t, map (fn c' => (c', Ss')) S')); |
605 |
in ((space, classes'), default, types) end); |
|
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
606 |
|
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
607 |
|
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
608 |
(* classrel *) |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
609 |
|
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
610 |
fun add_classrel pp rel tsig = |
19642 | 611 |
tsig |> map_tsig (fn ((space, classes), default, types) => |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
612 |
let |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
613 |
val rel' = pairself (cert_class tsig) rel |
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
614 |
handle TYPE (msg, _, _) => error msg; |
32784 | 615 |
val classes' = classes |> Sorts.add_classrel pp rel'; |
19642 | 616 |
in ((space, classes'), default, types) end); |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
617 |
|
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
618 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
619 |
(* default sort *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
620 |
|
19642 | 621 |
fun set_defsort S tsig = tsig |> map_tsig (fn (classes, _, types) => |
622 |
(classes, cert_sort tsig S handle TYPE (msg, _, _) => error msg, types)); |
|
0 | 623 |
|
624 |
||
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
625 |
(* types *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
626 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
627 |
local |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
628 |
|
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
629 |
fun new_decl naming (c, decl) types = |
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
630 |
#2 (Name_Space.define true naming (c, decl) types); |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
631 |
|
19642 | 632 |
fun map_types f = map_tsig (fn (classes, default, types) => |
19579
b802d1804b77
replaced Sorts.DOMAIN by general Sorts.CLASS_ERROR;
wenzelm
parents:
19530
diff
changeset
|
633 |
let |
b802d1804b77
replaced Sorts.DOMAIN by general Sorts.CLASS_ERROR;
wenzelm
parents:
19530
diff
changeset
|
634 |
val (space', tab') = f types; |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
635 |
val _ = Name_Space.intern space' "dummy" = "dummy" orelse |
21858
05f57309170c
avoid conflict with Alice keywords: renamed pack -> implode, unpack -> explode, any -> many, avoided assert;
wenzelm
parents:
21116
diff
changeset
|
636 |
error "Illegal declaration of dummy type"; |
19642 | 637 |
in (classes, default, (space', tab')) end); |
2964 | 638 |
|
14989 | 639 |
fun syntactic types (Type (c, Ts)) = |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
640 |
(case Symtab.lookup types c of SOME Nonterminal => true | _ => false) |
14989 | 641 |
orelse exists (syntactic types) Ts |
642 |
| syntactic _ _ = false; |
|
643 |
||
27302 | 644 |
in |
645 |
||
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
646 |
fun add_type naming (c, n) = |
33094
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
647 |
if n < 0 then error ("Bad type constructor declaration " ^ quote (Binding.str_of c)) |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
648 |
else map_types (new_decl naming (c, LogicalType n)); |
27302 | 649 |
|
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
650 |
fun add_abbrev naming (a, vs, rhs) tsig = tsig |> map_types (fn types => |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
651 |
let |
30343
79f022df8527
replace old bstring by binding for logical primitives: class, type, const etc.;
wenzelm
parents:
29275
diff
changeset
|
652 |
fun err msg = |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
653 |
cat_error msg ("The error(s) above occurred in type abbreviation " ^ |
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
654 |
quote (Binding.str_of a)); |
24274
cb9236269af1
type mode: models certification mode (default, syntax, abbrev);
wenzelm
parents:
23655
diff
changeset
|
655 |
val rhs' = strip_sorts (no_tvars (cert_typ_mode mode_syntax tsig rhs)) |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
656 |
handle TYPE (msg, _, _) => err msg; |
33094
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
657 |
val _ = |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
658 |
(case duplicates (op =) vs of |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
659 |
[] => [] |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
660 |
| dups => err ("Duplicate variables on lhs: " ^ commas_quote dups)); |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
661 |
val _ = |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
662 |
(case subtract (op =) vs (map #1 (Term.add_tfreesT rhs' [])) of |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
663 |
[] => [] |
ef0d77b1e687
eliminated separate stamp -- NameSpace.define/merge etc. ensure uniqueness already;
wenzelm
parents:
32784
diff
changeset
|
664 |
| extras => err ("Extra variables on rhs: " ^ commas_quote extras)); |
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
665 |
in types |> new_decl naming (a, Abbreviation (vs, rhs', syntactic (#2 types) rhs')) end); |
0 | 666 |
|
33173
b8ca12f6681a
eliminated obsolete tags for types/consts -- now handled via name space, in strongly typed fashion;
wenzelm
parents:
33097
diff
changeset
|
667 |
fun add_nonterminal naming = map_types o new_decl naming o rpair Nonterminal; |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
668 |
|
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
669 |
end; |
0 | 670 |
|
26669 | 671 |
fun hide_type fully c = map_tsig (fn (classes, default, (space, types)) => |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
672 |
(classes, default, (Name_Space.hide fully c space, types))); |
16370
033d890fe91f
name space of classes and types maintained in tsig;
wenzelm
parents:
16340
diff
changeset
|
673 |
|
3790 | 674 |
|
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
675 |
(* merge type signatures *) |
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
676 |
|
36450 | 677 |
fun merge_tsig pp (tsig1, tsig2) = |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
678 |
let |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
679 |
val (TSig {classes = (space1, classes1), default = default1, types = types1, |
26641 | 680 |
log_types = _}) = tsig1; |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
681 |
val (TSig {classes = (space2, classes2), default = default2, types = types2, |
26641 | 682 |
log_types = _}) = tsig2; |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
683 |
|
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
684 |
val space' = Name_Space.merge (space1, space2); |
19642 | 685 |
val classes' = Sorts.merge_algebra pp (classes1, classes2); |
19515
9f650083da65
build classes/arities: refer to operations in sorts.ML;
wenzelm
parents:
19464
diff
changeset
|
686 |
val default' = Sorts.inter_sort classes' (default1, default2); |
33095
bbd52d2f8696
renamed NameSpace to Name_Space -- also to emphasize its subtle change in semantics;
wenzelm
parents:
33094
diff
changeset
|
687 |
val types' = Name_Space.merge_tables (types1, types2); |
19642 | 688 |
in build_tsig ((space', classes'), default', types') end; |
14790
0d984ee030a1
major cleanup of tsig datastructures and extend/merge operations; fixes old bugs in classes/arities code; proper treatment of nonterminals and syntax-only types;
wenzelm
parents:
13666
diff
changeset
|
689 |
|
0 | 690 |
end; |