X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Fparser.mly;h=c6f961d2e42285e3add102ed9bc12b0d0c060840;hb=7b7cd85810f18286a36215cc164b659bf7db142c;hp=c47ac597f3b818682ed0028da63aaff20c19d557;hpb=24cc20b33e3d81ed7d754391bef929276c1f4f42;p=goals.git

diff --git a/src/parser.mly b/src/parser.mly
index c47ac59..c6f961d 100644
--- a/src/parser.mly
+++ b/src/parser.mly
@@ -18,7 +18,14 @@
  *)
 
 %{
+open Utils
 open Printf
+
+(* This is initialized with Lexer.read once the program
+ * starts.  Doing this avoids a circular dependency caused
+ * by include files.
+ *)
+let lexer_read = ref None
 %}
 
 (* Tokens. *)
@@ -29,6 +36,7 @@ open Printf
 %token EOF
 %token GOAL
 %token <string> ID
+%token INCLUDE
 %token LEFT_ARRAY
 %token LEFT_PAREN
 %token LET
@@ -36,9 +44,10 @@ open Printf
 %token RIGHT_PAREN
 %token <Ast.substs> STRING
 %token <string> TACTIC
+%token TACTIC_KEYWORD
 
 (* Start nonterminals. *)
-%start <Ast.env> file
+%start <Ast.expr Ast.Env.t> file
 %start <Ast.expr> expr
 %%
 
@@ -47,12 +56,35 @@ file:
     ;
 
 stmts:
-    | list(stmt)
-    { List.fold_left (
-        fun env (name, expr) -> Ast.Env.add name expr env
-      ) Ast.Env.empty $1
+    | (* none *) { Ast.Env.empty }
+    | stmts INCLUDE STRING
+    {
+      let env = $1 in
+      let filename = Ast.substitute env $loc $3 in
+      let rec find_on_include_path =
+        function
+        | [] -> filename
+        | inc :: incs ->
+           let path = inc // filename in
+           if Sys.file_exists path then path
+           else find_on_include_path incs
+      in
+      let filename =
+        if Filename.is_implicit filename then
+          find_on_include_path Cmdline.includes
+        else filename in
+      let fp = open_in filename in
+      let lexbuf = Lexing.from_channel fp in
+      lexbuf.lex_curr_p <- { lexbuf.lex_curr_p with pos_fname = filename };
+      let reader =
+        match !lexer_read with None -> assert false | Some r -> r in
+      let env' = file reader lexbuf in
+      close_in fp;
+      Ast.Env.merge env env'
     }
+    | stmts stmt  { let name, expr = $2 in Ast.Env.add name expr $1 }
     ;
+
 stmt:
     | option(goal_stmt) patterns COLON barelist option(CODE)
     { let name, params =
@@ -67,6 +99,10 @@ stmt:
       let name, params = $1 in
       name, Ast.EGoal ($loc, (params, [], [], Some $2))
     }
+    | TACTIC_KEYWORD TACTIC params_decl EQUALS CODE
+    {
+      $2, Ast.ETactic ($loc, ($3, $5))
+    }
     | LET ID EQUALS expr { $2, $4 }
     ;
 
@@ -84,9 +120,8 @@ patterns:
     | separated_list(COMMA, pattern) { $1 }
     ;
 pattern:
-    | STRING     { Ast.PTactic ($loc, "file", [$1]) }
+    | STRING     { Ast.PTactic ($loc, "*file", [$1]) }
     | ID pattern_params { Ast.PTactic ($loc, $1, $2) }
-    | ID         { Ast.PVar ($loc, $1) }
     ;
 pattern_params:
     | LEFT_PAREN separated_list(COMMA, pattern_param) RIGHT_PAREN { $2 }
@@ -96,9 +131,9 @@ pattern_param:
     ;
 
 expr:
-    | ID params  { Ast.ECall ($loc, $1, $2) }
+    | ID params  { Ast.ECallGoal ($loc, $1, $2) }
     | ID         { Ast.EVar ($loc, $1) }
-    | TACTIC params { Ast.ETactic ($loc, $1, $2) }
+    | TACTIC params { Ast.ECallTactic ($loc, $1, $2) }
     | STRING     { Ast.ESubsts ($loc, $1) }
     | LEFT_ARRAY barelist RIGHT_ARRAY { Ast.EList ($loc, $2) }
     ;