variables: accept dashes.

[bison.git] / src / parse-gram.y

diff --git a/src/parse-gram.y b/src/parse-gram.y
index 18e76fa8f532e4e8fed9c2ae045845fd2a78058d..2e4168b77ae53e3a6328ce6d57a2ef0f02406381 100644 (file)
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -1,7 +1,7 @@
 %{/* Bison Grammar Parser                             -*- C -*-
 
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
-   Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
+   Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -21,8 +21,6 @@
 #include <config.h>
 #include "system.h"
 
-#include <strverscmp.h>
-
 #include "complain.h"
 #include "conflicts.h"
 #include "files.h"
@@ -150,9 +148,6 @@ static int current_prec = 0;
   PERCENT_OUTPUT          "%output"
   PERCENT_PARSE_PARAM     "%parse-param"
   PERCENT_PURE_PARSER     "%pure-parser"
-  PERCENT_PUSH_PARSER     "%push-parser"
-  PERCENT_PUSH_PULL_PARSER
-                          "%push-pull-parser"
   PERCENT_REQUIRE        "%require"
   PERCENT_SKELETON        "%skeleton"
   PERCENT_START           "%start"
@@ -195,12 +190,12 @@ static int current_prec = 0;
 %type <integer> INT
 %printer { fprintf (stderr, "%d", $$); } INT
 
-%type <symbol> id id_colon symbol string_as_id
+%type <symbol> id id_colon symbol symbol.prec string_as_id
 %printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
 %printer { fprintf (stderr, "%s:", $$->tag); } id_colon
 
 %type <assoc> precedence_declarator
-%type <list>  symbols.1 generic_symlist generic_symlist_item
+%type <list>  symbols.1 symbols.prec generic_symlist generic_symlist_item
 %%
 
 input:
@@ -259,7 +254,7 @@ prologue_declaration:
       muscle_code_grow ("initial_action", action.code, @2);
       code_scanner_last_string_free ();
     }
-| "%language" STRING           { language_argmatch ($2, 1, &@1); }
+| "%language" STRING           { language_argmatch ($2, grammar_prio, @1); }
 | "%lex-param" "{...}"         { add_param ("lex_param", $2, @2); }
 | "%locations"                  { locations_flag = true; }
 | "%name-prefix" STRING         { spec_name_prefix = $2; }
@@ -269,9 +264,19 @@ prologue_declaration:
 | "%output" STRING              { spec_outfile = $2; }
 | "%output" "=" STRING          { spec_outfile = $3; }  /* deprecated */
 | "%parse-param" "{...}"       { add_param ("parse_param", $2, @2); }
-| "%pure-parser"                { pure_parser = true; }
-| "%push-parser"                { push_parser = true; pull_parser = false; }
-| "%push-pull-parser"           { push_parser = true; pull_parser = true; }
+| "%pure-parser"
+    {
+      /* %pure-parser is deprecated in favor of `%define api.pure', so use
+         `%define api.pure' in a backward-compatible manner here.  First, don't
+         complain if %pure-parser is specified multiple times.  */
+      if (!muscle_find_const ("percent_define(api.pure)"))
+        muscle_percent_define_insert ("api.pure", @1, "");
+      /* In all cases, use api.pure now so that the backend doesn't complain if
+         the skeleton ignores api.pure, but do warn now if there's a previous
+         conflicting definition from an actual %define.  */
+      if (!muscle_percent_define_flag_if ("api.pure"))
+        muscle_percent_define_insert ("api.pure", @1, "");
+    }
 | "%require" STRING             { version_check (&@2, $2); }
 | "%skeleton" STRING
     {
@@ -295,10 +300,10 @@ prologue_declaration:
           skeleton_user = uniqstr_new (skeleton_build);
           free (skeleton_build);
         }
-      skeleton_arg (skeleton_user, 1, &@1);
+      skeleton_arg (skeleton_user, grammar_prio, @1);
     }
 | "%token-table"                { token_table_flag = true; }
-| "%verbose"                    { report_flag = report_states; }
+| "%verbose"                    { report_flag |= report_states; }
 | "%yacc"                       { yacc_flag = true; }
 | /*FIXME: Err?  What is this horror doing here? */ ";"
 ;
@@ -392,7 +397,7 @@ symbol_declaration:
 ;
 
 precedence_declaration:
-  precedence_declarator type.opt symbols.1
+  precedence_declarator type.opt symbols.prec
     {
       symbol_list *list;
       ++current_prec;
@@ -417,6 +422,19 @@ type.opt:
 | TYPE           { current_type = $1; tag_seen = true; }
 ;
 
+/* Just like symbols.1 but accept INT for the sake of POSIX.  */
+symbols.prec:
+  symbol.prec
+    { $$ = symbol_list_sym_new ($1, @1); }
+| symbols.prec symbol.prec
+    { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+;
+
+symbol.prec:
+    symbol { $$ = $1; }
+  | symbol INT { $$ = $1; symbol_user_token_number_set ($1, $2, @2); }
+  ;
+
 /* One or more symbols to be %typed. */
 symbols.1:
   symbol
@@ -529,15 +547,12 @@ rhs:
 
 variable:
   ID
-  | STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */
-  ;
+| STRING { $$ = uniqstr_new ($1); }
+;
 
 /* Some content or empty by default. */
 content.opt:
-  /* Nothing. */
-    {
-      $$ = "";
-    }
+  /* Nothing. */   { $$ = ""; }
 | STRING
 ;