/* 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.
#include "complain.h"
#include "files.h"
-#include "getargs.h" /* yacc_flag */
#include "gram.h"
#include "quotearg.h"
#include "reader.h"
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_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)
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);
/* 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 %%);
/* 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);
| 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"));
`----------------------------*/
<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;
- "%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;
+ "%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;
+ "%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));
"=" return EQUAL;
"|" return PIPE;
";" return SEMICOLON;
+ "<*>" return TYPE_TAG_ANY;
+ "<>" return TYPE_TAG_NONE;
{id} {
- val->symbol = symbol_get (yytext, *loc);
+ val->uniqstr = uniqstr_new (yytext);
id_loc = *loc;
BEGIN SC_AFTER_IDENTIFIER;
}
/* Code in between braces. */
"{" {
- if (current_rule && current_rule->action)
- grammar_midrule_action ();
STRING_GROW;
- token_type = BRACED_CODE;
braces_level = 0;
code_start = loc->start;
BEGIN SC_BRACED_CODE;
<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;
}
/*----------------------------------------------------------.
<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;
- 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;
- 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>
}
- /*---------------------------------------------------------------.
- | 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>
{
{
STRING_FINISH;
loc->start = code_start;
- val->chars = last_string;
- gram_last_braced_code_loc = *loc;
+ val->code = last_string;
BEGIN INITIAL;
- return token_type;
+ return BRACED_CODE;
}
}
(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;
+ }
}
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;
+ }
}
{
obstack_free (&obstack_for_string, 0);
/* Reclaim Flex's buffers. */
- yy_delete_buffer (YY_CURRENT_BUFFER);
+ yylex_destroy ();
}
projects / bison.git / blobdiff