* LR0.c (new_itemsets): Fix wording in comments: say item index rather

[bison.git] / src / scan-gram.l

diff --git a/src/scan-gram.l b/src/scan-gram.l
index 61545cbba7760ca76ff66144e5d29dd356d08174..fb22e5888c2773e3f548f8b2a9a797ca290f9396 100644 (file)
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,6 +1,7 @@
 /* Bison Grammar Scanner                             -*- C -*-
 
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
+   Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -24,9 +25,6 @@
 %option prefix="gram_" outfile="lex.yy.c"
 
 %{
-#include <config.h>
-#include "system.h"
-
 /* Work around a bug in flex 2.5.31.  See Debian bug 333231
    <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=333231>.  */
 #undef gram_wrap
@@ -37,7 +35,6 @@
 
 #include "complain.h"
 #include "files.h"
-#include "getargs.h"    /* yacc_flag */
 #include "gram.h"
 #include "quotearg.h"
 #include "reader.h"
@@ -54,7 +51,7 @@
    code_start = scanner_cursor = loc->start;           \
 
 /* Location of scanner cursor.  */
-boundary scanner_cursor;
+static boundary scanner_cursor;
 
 #define YY_USER_ACTION  location_compute (loc, &scanner_cursor, yytext, yyleng);
 
@@ -62,7 +59,7 @@ static size_t no_cr_read (FILE *, char *, size_t);
 #define YY_INPUT(buf, result, size) ((result) = no_cr_read (yyin, buf, size))
 
 /* A string representing the most recently saved token.  */
-char *last_string;
+static char *last_string;
 
 void
 gram_scanner_last_string_free (void)
@@ -70,10 +67,6 @@ gram_scanner_last_string_free (void)
   STRING_FREE;
 }
 
-/* The location of the most recently saved token, if it was a
-   BRACED_CODE token; otherwise, this has an unspecified value.  */
-location gram_last_braced_code_loc;
-
 static void handle_syncline (char *, location);
 static unsigned long int scan_integer (char const *p, int base, location loc);
 static int convert_ucn_to_byte (char const *hex_text);
@@ -165,6 +158,7 @@ splice       (\\[ \f\t\v]*\n)*
 <INITIAL>
 {
   "%binary"                        return PERCENT_NONASSOC;
+  "%code"                           return PERCENT_CODE;
   "%debug"                         return PERCENT_DEBUG;
   "%default"[-_]"prec"             return PERCENT_DEFAULT_PREC;
   "%define"                        return PERCENT_DEFINE;
@@ -178,6 +172,7 @@ splice       (\\[ \f\t\v]*\n)*
   "%fixed"[-_]"output"[-_]"files"   return PERCENT_YACC;
   "%initial-action"                return PERCENT_INITIAL_ACTION;
   "%glr-parser"                    return PERCENT_GLR_PARSER;
+  "%language"                      return PERCENT_LANGUAGE;
   "%left"                          return PERCENT_LEFT;
   "%lex-param"                     return PERCENT_LEX_PARAM;
   "%locations"                     return PERCENT_LOCATIONS;
@@ -193,6 +188,8 @@ splice       (\\[ \f\t\v]*\n)*
   "%prec"                          return PERCENT_PREC;
   "%printer"                       return PERCENT_PRINTER;
   "%pure"[-_]"parser"              return PERCENT_PURE_PARSER;
+  "%push-parser"                   return PERCENT_PUSH_PARSER;
+  "%push-pull-parser"              return PERCENT_PUSH_PULL_PARSER;
   "%require"                       return PERCENT_REQUIRE;
   "%right"                         return PERCENT_RIGHT;
   "%skeleton"                      return PERCENT_SKELETON;
@@ -212,6 +209,8 @@ splice       (\\[ \f\t\v]*\n)*
   "="                     return EQUAL;
   "|"                     return PIPE;
   ";"                     return SEMICOLON;
+  "<*>"                   return TYPE_TAG_ANY;
+  "<>"                    return TYPE_TAG_NONE;
 
   {id} {
     val->uniqstr = uniqstr_new (yytext);
@@ -239,8 +238,6 @@ splice       (\\[ \f\t\v]*\n)*
 
   /* Code in between braces.  */
   "{" {
-    if (current_rule && current_rule->action)
-      grammar_midrule_action ();
     STRING_GROW;
     braces_level = 0;
     code_start = loc->start;
@@ -342,15 +339,23 @@ splice     (\\[ \f\t\v]*\n)*
 
 <SC_ESCAPED_STRING>
 {
-  "\"" {
+  "\""|"\n" {
+    if (yytext[0] == '\n')
+      unexpected_newline (token_start, "\"");
+    STRING_FINISH;
+    loc->start = token_start;
+    val->chars = last_string;
+    BEGIN INITIAL;
+    return STRING;
+  }
+  <<EOF>> {
+    unexpected_eof (token_start, "\"");
     STRING_FINISH;
     loc->start = token_start;
     val->chars = last_string;
     BEGIN INITIAL;
     return STRING;
   }
-  \n           unexpected_newline (token_start, "\""); BEGIN INITIAL;
-  <<EOF>>      unexpected_eof (token_start, "\"");     BEGIN INITIAL;
 }
 
   /*----------------------------------------------------------.
@@ -360,7 +365,9 @@ splice       (\\[ \f\t\v]*\n)*
 
 <SC_ESCAPED_CHARACTER>
 {
-  "'" {
+  "'"|"\n" {
+    if (yytext[0] == '\n')
+      unexpected_newline (token_start, "'");
     STRING_GROW;
     STRING_FINISH;
     loc->start = token_start;
@@ -369,8 +376,18 @@ splice      (\\[ \f\t\v]*\n)*
     BEGIN INITIAL;
     return CHAR;
   }
-  \n           unexpected_newline (token_start, "'");  BEGIN INITIAL;
-  <<EOF>>      unexpected_eof (token_start, "'");      BEGIN INITIAL;
+  <<EOF>> {
+    unexpected_eof (token_start, "'");
+    STRING_FINISH;
+    loc->start = token_start;
+    if (strlen(last_string) > 1)
+      val->character = last_string[1];
+    else
+      val->character = last_string[0];
+    STRING_FREE;
+    BEGIN INITIAL;
+    return CHAR;
+  }
 }
 
 <SC_ESCAPED_CHARACTER,SC_ESCAPED_STRING>
@@ -506,8 +523,7 @@ splice       (\\[ \f\t\v]*\n)*
       {
        STRING_FINISH;
        loc->start = code_start;
-       val->chars = last_string;
-       gram_last_braced_code_loc = *loc;
+       val->code = last_string;
        BEGIN INITIAL;
        return BRACED_CODE;
       }
@@ -517,7 +533,14 @@ splice      (\\[ \f\t\v]*\n)*
      (as `<' `<%').  */
   "<"{splice}"<"  STRING_GROW;
 
-  <<EOF>>  unexpected_eof (code_start, "}"); BEGIN INITIAL;
+  <<EOF>> {
+    unexpected_eof (code_start, "}");
+    STRING_FINISH;
+    loc->start = code_start;
+    val->code = last_string;
+    BEGIN INITIAL;
+    return BRACED_CODE;
+  }
 }
 
 
@@ -535,7 +558,14 @@ splice      (\\[ \f\t\v]*\n)*
     return PROLOGUE;
   }
 
-  <<EOF>>  unexpected_eof (code_start, "%}"); BEGIN INITIAL;
+  <<EOF>> {
+    unexpected_eof (code_start, "%}");
+    STRING_FINISH;
+    loc->start = code_start;
+    val->chars = last_string;
+    BEGIN INITIAL;
+    return PROLOGUE;
+  }
 }
 
 
@@ -770,5 +800,5 @@ gram_scanner_free (void)
 {
   obstack_free (&obstack_for_string, 0);
   /* Reclaim Flex's buffers.  */
-  yy_delete_buffer (YY_CURRENT_BUFFER);
+  yylex_destroy ();
 }