In debug mode (-d) print all shell scripts executed.

[goals.git] / src / parser.mly

diff --git a/src/parser.mly b/src/parser.mly
index aca014e..7146a99 100644 (file)
--- a/src/parser.mly
+++ b/src/parser.mly
@@ -60,11 +60,12 @@ let do_include env loc filename optflag file =
 %}
 
 (* Tokens. *)
-%token <Ast.substs> CODE
+%token <Ast.code> CODE
 %token COLON
 %token COMMA
 %token EQUALS
 %token EOF
+%token EXPRESSION
 %token FUNCTION
 %token GOAL
 %token <string> ID
@@ -73,10 +74,14 @@ let do_include env loc filename optflag file =
 %token LEFT_PAREN
 %token LET
 %token OPTINCLUDE
+%token PURE
+%token RETURNING
 %token RIGHT_ARRAY
 %token RIGHT_PAREN
 %token SEMICOLON
 %token <Ast.substs> STRING
+%token STRING_KEYWORD
+%token STRINGS
 %token <string> TACTIC
 %token TACTIC_KEYWORD
 
@@ -113,9 +118,9 @@ stmt:
       let name, params = $1 in
       name, Ast.EGoalDefn ($loc, (params, [], [], Some $2))
     }
-    | FUNCTION ID params_decl EQUALS CODE
+    | option(PURE) FUNCTION ID params_decl return_decl EQUALS CODE
     {
-      $2, Ast.EFuncDefn ($loc, ($3, $5))
+      $3, Ast.EFuncDefn ($loc, ($4, $5, $1 <> None, $7))
     }
     | TACTIC_KEYWORD TACTIC params_decl EQUALS CODE
     {
@@ -133,13 +138,18 @@ params_decl:
     ;
 param_decl:
     | ID         { $1 }
+return_decl:
+    |            { RetExpr }
+    | RETURNING EXPRESSION { RetExpr }
+    | RETURNING STRINGS { RetStrings }
+    | RETURNING STRING_KEYWORD { RetString }
 
 patterns:
     | separated_list(COMMA, pattern) { $1 }
     ;
 pattern:
     | STRING     { Ast.PTactic ($loc, "*file", [$1]) }
-    | ID pattern_params { Ast.PTactic ($loc, $1, $2) }
+    | TACTIC pattern_params { Ast.PTactic ($loc, $1, $2) }
     ;
 pattern_params:
     | LEFT_PAREN separated_list(COMMA, pattern_param) RIGHT_PAREN { $2 }