Credit Satya for the graphviz change.

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

diff --git a/src/scan-gram.l b/src/scan-gram.l
index 2c200b452c6b864819b79e542cf35c9bc6625d60..c1a53276d832548dc4923d2c3b90e4aea6284d24 100644 (file)
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -24,9 +24,6 @@
 %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 +34,6 @@
 
 #include "complain.h"
 #include "files.h"
-#include "getargs.h"    /* yacc_flag */
 #include "gram.h"
 #include "quotearg.h"
 #include "reader.h"
@@ -54,7 +50,7 @@
    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);
 
@@ -70,10 +66,6 @@ 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);
@@ -164,8 +156,8 @@ splice       (\\[ \f\t\v]*\n)*
   `----------------------------*/
 <INITIAL>
 {
-  "%after-definitions"              return PERCENT_AFTER_DEFINITIONS;
-  "%before-definitions"             return PERCENT_BEFORE_DEFINITIONS;
+  "%after-header"                   return PERCENT_AFTER_HEADER;
+  "%before-header"                  return PERCENT_BEFORE_HEADER;
   "%binary"                        return PERCENT_NONASSOC;
   "%debug"                         return PERCENT_DEBUG;
   "%default"[-_]"prec"             return PERCENT_DEFAULT_PREC;
@@ -173,6 +165,7 @@ splice       (\\[ \f\t\v]*\n)*
   "%defines"                       return PERCENT_DEFINES;
   "%destructor"                            return PERCENT_DESTRUCTOR;
   "%dprec"                         return PERCENT_DPREC;
+  "%end-header"                     return PERCENT_END_HEADER;
   "%error"[-_]"verbose"            return PERCENT_ERROR_VERBOSE;
   "%expect"                        return PERCENT_EXPECT;
   "%expect"[-_]"rr"                return PERCENT_EXPECT_RR;
@@ -195,10 +188,13 @@ 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;
   "%require"                       return PERCENT_REQUIRE;
   "%right"                         return PERCENT_RIGHT;
   "%skeleton"                      return PERCENT_SKELETON;
   "%start"                         return PERCENT_START;
+  "%start-header"                   return PERCENT_START_HEADER;
+  "%symbol-default"                 return PERCENT_SYMBOL_DEFAULT;
   "%term"                          return PERCENT_TOKEN;
   "%token"                         return PERCENT_TOKEN;
   "%token"[-_]"table"              return PERCENT_TOKEN_TABLE;
@@ -241,8 +237,6 @@ 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;
@@ -344,15 +338,23 @@ 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;
 }
 
   /*----------------------------------------------------------.
@@ -362,7 +364,9 @@ 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;
@@ -371,8 +375,18 @@ 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>
@@ -509,7 +523,6 @@ splice       (\\[ \f\t\v]*\n)*
        STRING_FINISH;
        loc->start = code_start;
        val->chars = last_string;
-       gram_last_braced_code_loc = *loc;
        BEGIN INITIAL;
        return BRACED_CODE;
       }
@@ -519,7 +532,14 @@ 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->chars = last_string;
+    BEGIN INITIAL;
+    return BRACED_CODE;
+  }
 }
 
 
@@ -537,7 +557,14 @@ 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;
+  }
 }