* data/Makefile.am (dist_pkgdata_DATA): Remove push.c.

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

diff --git a/src/scan-gram.l b/src/scan-gram.l
index dbe40b9c13bc8ba6c81cf587037c8fb72c54b97a..697f52f054a73058ae287624c6fdf6ff9f757d46 100644 (file)
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,12 +1,13 @@
 /* Bison Grammar Scanner                             -*- C -*-
 
 /* 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.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 

-   This program is free software; you can redistribute it and/or modify
+   This program is free software: you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by
    it under the terms of the GNU General Public License as published by

-   the Free Software Foundation; either version 2 of the License, or
+   the Free Software Foundation, either version 3 of the License, or

    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,


@@ -15,10 +16,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License

-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301  USA
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 %option debug nodefault nounput noyywrap never-interactive
 %option prefix="gram_" outfile="lex.yy.c"
 
 %option debug nodefault nounput noyywrap never-interactive
 %option prefix="gram_" outfile="lex.yy.c"


@@ -34,7 +32,6 @@
 
 #include "complain.h"
 #include "files.h"
 
 #include "complain.h"
 #include "files.h"

-#include "getargs.h"    /* yacc_flag */

 #include "gram.h"
 #include "quotearg.h"
 #include "reader.h"
 #include "gram.h"
 #include "quotearg.h"
 #include "reader.h"


@@ -51,7 +48,7 @@
    code_start = scanner_cursor = loc->start;           \
 
 /* Location of scanner cursor.  */
    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);
 
 
 #define YY_USER_ACTION  location_compute (loc, &scanner_cursor, yytext, yyleng);
 


@@ -59,7 +56,7 @@ 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.  */
 #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)
 
 void
 gram_scanner_last_string_free (void)


@@ -67,10 +64,6 @@ gram_scanner_last_string_free (void)
   STRING_FREE;
 }
 
   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);
 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);


@@ -85,9 +78,6 @@ static void unexpected_newline (boundary, char const *);
  /* A identifier was just read in directives/rules.  Special state
     to capture the sequence `identifier :'. */
 %x SC_AFTER_IDENTIFIER
  /* A identifier was just read in directives/rules.  Special state
     to capture the sequence `identifier :'. */
 %x SC_AFTER_IDENTIFIER

- /* A keyword that should be followed by some code was read (e.g.
-    %printer). */
-%x SC_PRE_CODE

 
  /* Three types of user code:
     - prologue (code between `%{' `%}' in the first section, before %%);
 
  /* Three types of user code:
     - prologue (code between `%{' `%}' in the first section, before %%);


@@ -121,9 +111,6 @@ splice       (\\[ \f\t\v]*\n)*
   /* Parent context state, when applicable.  */
   int context_state IF_LINT (= 0);
 
   /* Parent context state, when applicable.  */
   int context_state IF_LINT (= 0);
 

-  /* Token type to return, when applicable.  */
-  int token_type IF_LINT (= 0);
-

   /* Location of most recent identifier, when applicable.  */
   location id_loc IF_LINT (= empty_location);
 
   /* Location of most recent identifier, when applicable.  */
   location id_loc IF_LINT (= empty_location);
 


@@ -142,7 +129,7 @@ splice       (\\[ \f\t\v]*\n)*
   | Scanning white space.  |
   `-----------------------*/
 
   | Scanning white space.  |
   `-----------------------*/
 

-<INITIAL,SC_AFTER_IDENTIFIER,SC_PRE_CODE>
+<INITIAL,SC_AFTER_IDENTIFIER>

 {
   /* Comments and white space.  */
   ","         warn_at (*loc, _("stray `,' treated as white space"));
 {
   /* Comments and white space.  */
   ","         warn_at (*loc, _("stray `,' treated as white space"));


@@ -167,46 +154,48 @@ splice     (\\[ \f\t\v]*\n)*
   `----------------------------*/
 <INITIAL>
 {
   `----------------------------*/
 <INITIAL>
 {

-  "%binary"               return PERCENT_NONASSOC;
-  "%debug"                return PERCENT_DEBUG;
-  "%default"[-_]"prec"    return PERCENT_DEFAULT_PREC;
-  "%define"               return PERCENT_DEFINE;
-  "%defines"              return PERCENT_DEFINES;
-  "%destructor"                  /* FIXME: Remove once %union handled differently.  */ token_type = BRACED_CODE; return PERCENT_DESTRUCTOR;
-  "%dprec"               return PERCENT_DPREC;
-  "%error"[-_]"verbose"   return PERCENT_ERROR_VERBOSE;
-  "%expect"               return PERCENT_EXPECT;
-  "%expect"[-_]"rr"      return PERCENT_EXPECT_RR;
-  "%file-prefix"          return PERCENT_FILE_PREFIX;
+  "%binary"                        return PERCENT_NONASSOC;
+  "%code"                           return PERCENT_CODE;
+  "%debug"                         return PERCENT_DEBUG;
+  "%default"[-_]"prec"             return PERCENT_DEFAULT_PREC;
+  "%define"                        return PERCENT_DEFINE;
+  "%defines"                       return PERCENT_DEFINES;
+  "%destructor"                            return PERCENT_DESTRUCTOR;
+  "%dprec"                         return PERCENT_DPREC;
+  "%error"[-_]"verbose"            return PERCENT_ERROR_VERBOSE;
+  "%expect"                        return PERCENT_EXPECT;
+  "%expect"[-_]"rr"                return PERCENT_EXPECT_RR;
+  "%file-prefix"                   return PERCENT_FILE_PREFIX;

   "%fixed"[-_]"output"[-_]"files"   return PERCENT_YACC;
   "%fixed"[-_]"output"[-_]"files"   return PERCENT_YACC;

-  "%initial-action"       /* FIXME: Remove once %union handled differently.  */ token_type = BRACED_CODE; return PERCENT_INITIAL_ACTION;
-  "%glr-parser"           return PERCENT_GLR_PARSER;
-  "%left"                 return PERCENT_LEFT;
-  "%lex-param"           /* FIXME: Remove once %union handled differently.  */ token_type = BRACED_CODE; return PERCENT_LEX_PARAM;
-  "%locations"            return PERCENT_LOCATIONS;
-  "%merge"               return PERCENT_MERGE;
-  "%name"[-_]"prefix"     return PERCENT_NAME_PREFIX;
-  "%no"[-_]"default"[-_]"prec" return PERCENT_NO_DEFAULT_PREC;
-  "%no"[-_]"lines"        return PERCENT_NO_LINES;
-  "%nonassoc"             return PERCENT_NONASSOC;
-  "%nondeterministic-parser"   return PERCENT_NONDETERMINISTIC_PARSER;
-  "%nterm"                return PERCENT_NTERM;
-  "%output"               return PERCENT_OUTPUT;
-  "%parse-param"         /* FIXME: Remove once %union handled differently.  */ token_type = BRACED_CODE; return PERCENT_PARSE_PARAM;
-  "%prec"                 return PERCENT_PREC;
-  "%printer"              /* FIXME: Remove once %union handled differently.  */ token_type = BRACED_CODE; return PERCENT_PRINTER;
-  "%pure"[-_]"parser"     return PERCENT_PURE_PARSER;
-  "%require"              return PERCENT_REQUIRE;
-  "%right"                return PERCENT_RIGHT;
-  "%skeleton"             return PERCENT_SKELETON;
-  "%start"                return PERCENT_START;
-  "%term"                 return PERCENT_TOKEN;
-  "%token"                return PERCENT_TOKEN;
-  "%token"[-_]"table"     return PERCENT_TOKEN_TABLE;
-  "%type"                 return PERCENT_TYPE;
-  "%union"               token_type = PERCENT_UNION; BEGIN SC_PRE_CODE;
-  "%verbose"              return PERCENT_VERBOSE;
-  "%yacc"                 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;
+  "%merge"                         return PERCENT_MERGE;
+  "%name"[-_]"prefix"              return PERCENT_NAME_PREFIX;
+  "%no"[-_]"default"[-_]"prec"     return PERCENT_NO_DEFAULT_PREC;
+  "%no"[-_]"lines"                 return PERCENT_NO_LINES;
+  "%nonassoc"                      return PERCENT_NONASSOC;
+  "%nondeterministic-parser"               return PERCENT_NONDETERMINISTIC_PARSER;
+  "%nterm"                         return PERCENT_NTERM;
+  "%output"                        return PERCENT_OUTPUT;
+  "%parse-param"                   return PERCENT_PARSE_PARAM;
+  "%prec"                          return PERCENT_PREC;
+  "%printer"                       return PERCENT_PRINTER;
+  "%pure"[-_]"parser"              return PERCENT_PURE_PARSER;
+  "%require"                       return PERCENT_REQUIRE;
+  "%right"                         return PERCENT_RIGHT;
+  "%skeleton"                      return PERCENT_SKELETON;
+  "%start"                         return PERCENT_START;
+  "%term"                          return PERCENT_TOKEN;
+  "%token"                         return PERCENT_TOKEN;
+  "%token"[-_]"table"              return PERCENT_TOKEN_TABLE;
+  "%type"                          return PERCENT_TYPE;
+  "%union"                         return PERCENT_UNION;
+  "%verbose"                       return PERCENT_VERBOSE;
+  "%yacc"                          return PERCENT_YACC;

 
   {directive} {
     complain_at (*loc, _("invalid directive: %s"), quote (yytext));
 
   {directive} {
     complain_at (*loc, _("invalid directive: %s"), quote (yytext));


@@ -215,9 +204,11 @@ splice      (\\[ \f\t\v]*\n)*
   "="                     return EQUAL;
   "|"                     return PIPE;
   ";"                     return SEMICOLON;
   "="                     return EQUAL;
   "|"                     return PIPE;
   ";"                     return SEMICOLON;

+  "<*>"                   return TYPE_TAG_ANY;
+  "<>"                    return TYPE_TAG_NONE;

 
   {id} {
 
   {id} {

-    val->symbol = symbol_get (yytext, *loc);
+    val->uniqstr = uniqstr_new (yytext);

     id_loc = *loc;
     BEGIN SC_AFTER_IDENTIFIER;
   }
     id_loc = *loc;
     BEGIN SC_AFTER_IDENTIFIER;
   }


@@ -242,10 +233,7 @@ splice      (\\[ \f\t\v]*\n)*
 
   /* Code in between braces.  */
   "{" {
 
   /* Code in between braces.  */
   "{" {

-    if (current_rule && current_rule->action)
-      grammar_midrule_action ();

     STRING_GROW;
     STRING_GROW;

-    token_type = BRACED_CODE;

     braces_level = 0;
     code_start = loc->start;
     BEGIN SC_BRACED_CODE;
     braces_level = 0;
     code_start = loc->start;
     BEGIN SC_BRACED_CODE;


@@ -346,15 +334,23 @@ splice     (\\[ \f\t\v]*\n)*
 
 <SC_ESCAPED_STRING>
 {
 
 <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;
   }
     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;

 }
 
   /*----------------------------------------------------------.
 }
 
   /*----------------------------------------------------------.


@@ -364,23 +360,29 @@ splice     (\\[ \f\t\v]*\n)*
 
 <SC_ESCAPED_CHARACTER>
 {
 
 <SC_ESCAPED_CHARACTER>
 {

-  "'" {
-    unsigned char last_string_1;
+  "'"|"\n" {
+    if (yytext[0] == '\n')
+      unexpected_newline (token_start, "'");

     STRING_GROW;
     STRING_FINISH;
     loc->start = token_start;
     STRING_GROW;
     STRING_FINISH;
     loc->start = token_start;

-    val->symbol = symbol_get (quotearg_style (escape_quoting_style,
-                                             last_string),
-                             *loc);
-    symbol_class_set (val->symbol, token_sym, *loc, false);
-    last_string_1 = last_string[1];
-    symbol_user_token_number_set (val->symbol, last_string_1, *loc);
+    val->character = last_string[1];

     STRING_FREE;
     BEGIN INITIAL;
     STRING_FREE;
     BEGIN INITIAL;

-    return ID;
+    return CHAR;
+  }
+  <<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;

   }
   }

-  \n           unexpected_newline (token_start, "'");  BEGIN INITIAL;
-  <<EOF>>      unexpected_eof (token_start, "'");      BEGIN INITIAL;

 }
 
 <SC_ESCAPED_CHARACTER,SC_ESCAPED_STRING>
 }
 
 <SC_ESCAPED_CHARACTER,SC_ESCAPED_STRING>


@@ -498,45 +500,11 @@ splice     (\\[ \f\t\v]*\n)*
 }
 
 
 }
 
 

-  /*---------------------------------------------------------------.
-  | Scanning after %union etc., possibly followed by white space.  |
-  | For %union only, allow arbitrary C code to appear before the   |
-  | following brace, as an extension to POSIX.                    |
-  `---------------------------------------------------------------*/
-
-<SC_PRE_CODE>
-{
-  . {
-    bool valid = yytext[0] == '{' || token_type == PERCENT_UNION;
-    scanner_cursor.column -= mbsnwidth (yytext, yyleng, 0);
-    yyless (0);
-
-    if (valid)
-      {
-       braces_level = -1;
-       code_start = loc->start;
-       BEGIN SC_BRACED_CODE;
-      }
-    else
-      {
-       complain_at (*loc, _("missing `{' in %s"),
-                    token_name (token_type));
-       obstack_sgrow (&obstack_for_string, "{}");
-       STRING_FINISH;
-       val->chars = last_string;
-       BEGIN INITIAL;
-       return token_type;
-      }
-  }
-
-  <<EOF>>  unexpected_eof (scanner_cursor, "{}"); BEGIN INITIAL;
-}
-

 
 

-  /*---------------------------------------------------------------.
-  | Scanning some code in braces (%union and actions). The initial |
-  | "{" is already eaten.                                          |
-  `---------------------------------------------------------------*/
+  /*-----------------------------------------------------------.
+  | Scanning some code in braces (actions). The initial "{" is |
+  | already eaten.                                             |
+  `-----------------------------------------------------------*/

 
 <SC_BRACED_CODE>
 {
 
 <SC_BRACED_CODE>
 {


@@ -550,10 +518,9 @@ splice      (\\[ \f\t\v]*\n)*
       {
        STRING_FINISH;
        loc->start = code_start;
       {
        STRING_FINISH;
        loc->start = code_start;

-       val->chars = last_string;
-       gram_last_braced_code_loc = *loc;
+       val->code = last_string;

        BEGIN INITIAL;
        BEGIN INITIAL;

-       return token_type;
+       return BRACED_CODE;

       }
   }
 
       }
   }
 


@@ -561,7 +528,14 @@ splice      (\\[ \f\t\v]*\n)*
      (as `<' `<%').  */
   "<"{splice}"<"  STRING_GROW;
 
      (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;
+  }

 }
 
 
 }
 
 


@@ -579,7 +553,14 @@ splice      (\\[ \f\t\v]*\n)*
     return PROLOGUE;
   }
 
     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;
+  }

 }
 
 
 }
 
 


@@ -751,7 +732,7 @@ handle_syncline (char *args, location loc)
       lineno = INT_MAX;
     }
   current_file = uniqstr_new (file);
       lineno = INT_MAX;
     }
   current_file = uniqstr_new (file);

-  boundary_set, (&scanner_cursor, current_file, lineno, 1);
+  boundary_set (&scanner_cursor, current_file, lineno, 1);

 }
 
 
 }
 
 


@@ -814,5 +795,5 @@ gram_scanner_free (void)
 {
   obstack_free (&obstack_for_string, 0);
   /* Reclaim Flex's buffers.  */
 {
   obstack_free (&obstack_for_string, 0);
   /* Reclaim Flex's buffers.  */

-  yy_delete_buffer (YY_CURRENT_BUFFER);
+  yylex_destroy ();

 }
 }