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/* -*- indented-text -*- */
/* Process source files and output type information.
Copyright (C) 2002-2013 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
%option noinput
%{
#ifdef GENERATOR_FILE
#include "bconfig.h"
#else
#include "config.h"
#endif
#include "system.h"
#define malloc xmalloc
#define realloc xrealloc
#include "gengtype.h"
#define YY_DECL int yylex (const char **yylval)
#define yyterminate() return EOF_TOKEN
struct fileloc lexer_line;
int lexer_toplevel_done;
static void
update_lineno (const char *l, size_t len)
{
while (len-- > 0)
if (*l++ == '\n')
lexer_line.line++;
}
%}
CID [[:alpha:]_][[:alnum:]_]*
WS [[:space:]]+
HWS [ \t\r\v\f]*
IWORD short|long|(un)?signed|char|int|HOST_WIDE_INT|HOST_WIDEST_INT|bool|size_t|BOOL_BITFIELD|CPPCHAR_SIGNED_T|ino_t|dev_t|HARD_REG_SET
ITYPE {IWORD}({WS}{IWORD})*
/* Include '::' in identifiers to capture C++ scope qualifiers. */
ID {CID}({HWS}::{HWS}{CID})*
EOID [^[:alnum:]_]
CXX_KEYWORD inline|public:|private:|protected:|template|operator|friend|static
%x in_struct in_struct_comment in_comment
%option warn noyywrap nounput nodefault perf-report
%option 8bit never-interactive
%%
/* Do this on entry to yylex(): */
*yylval = 0;
if (lexer_toplevel_done)
{
BEGIN(INITIAL);
lexer_toplevel_done = 0;
}
/* Things we look for in skipping mode: */
<INITIAL>{
^{HWS}typedef/{EOID} {
BEGIN(in_struct);
return TYPEDEF;
}
^{HWS}struct/{EOID} {
BEGIN(in_struct);
return STRUCT;
}
^{HWS}union/{EOID} {
BEGIN(in_struct);
return UNION;
}
^{HWS}class/{EOID} {
BEGIN(in_struct);
return STRUCT;
}
^{HWS}extern/{EOID} {
BEGIN(in_struct);
return EXTERN;
}
^{HWS}static/{EOID} {
BEGIN(in_struct);
return STATIC;
}
}
/* Parsing inside a struct, union or class declaration. */
<in_struct>{
"/*" { BEGIN(in_struct_comment); }
"//".*\n { lexer_line.line++; }
{WS} { update_lineno (yytext, yyleng); }
\\\n { lexer_line.line++; }
"const"/{EOID} /* don't care */
{CXX_KEYWORD}/{EOID} |
"~" |
"^" |
"&" {
*yylval = XDUPVAR (const char, yytext, yyleng, yyleng + 1);
return IGNORABLE_CXX_KEYWORD;
}
"GTY"/{EOID} { return GTY_TOKEN; }
"union"/{EOID} { return UNION; }
"struct"/{EOID} { return STRUCT; }
"class"/{EOID} { return STRUCT; }
"typedef"/{EOID} { return TYPEDEF; }
"enum"/{EOID} { return ENUM; }
"ptr_alias"/{EOID} { return PTR_ALIAS; }
"nested_ptr"/{EOID} { return NESTED_PTR; }
"user"/{EOID} { return USER_GTY; }
[0-9]+ { return NUM; }
"param"[0-9]*"_is"/{EOID} {
*yylval = XDUPVAR (const char, yytext, yyleng, yyleng+1);
return PARAM_IS;
}
{IWORD}({WS}{IWORD})*/{EOID} |
"ENUM_BITFIELD"{WS}?"("{WS}?{ID}{WS}?")" {
size_t len;
for (len = yyleng; ISSPACE (yytext[len-1]); len--)
;
*yylval = XDUPVAR (const char, yytext, len, len+1);
update_lineno (yytext, yyleng);
return SCALAR;
}
{ID}/{EOID} {
*yylval = XDUPVAR (const char, yytext, yyleng, yyleng+1);
return ID;
}
\"([^"\\]|\\.)*\" {
*yylval = XDUPVAR (const char, yytext+1, yyleng-2, yyleng-1);
return STRING;
}
/* This "terminal" avoids having to parse integer constant expressions. */
"["[^\[\]]*"]" {
*yylval = XDUPVAR (const char, yytext+1, yyleng-2, yyleng-1);
return ARRAY;
}
"'"("\\".|[^\\])"'" {
*yylval = XDUPVAR (const char, yytext+1, yyleng-2, yyleng);
return CHAR;
}
"..." { return ELLIPSIS; }
[(){},*:<>;=%|+\!\?\.-] { return yytext[0]; }
/* ignore pp-directives */
^{HWS}"#"{HWS}[a-z_]+[^\n]*\n {lexer_line.line++;}
. {
error_at_line (&lexer_line, "unexpected character `%s'", yytext);
}
}
"/*" { BEGIN(in_comment); }
"//".*\n { lexer_line.line++; }
\n { lexer_line.line++; }
{ID} |
"'"("\\".|[^\\])"'" |
[^"/\n] /* do nothing */
\"([^"\\]|\\.|\\\n)*\" { update_lineno (yytext, yyleng); }
"/"/[^*] /* do nothing */
<in_comment,in_struct_comment>{
\n { lexer_line.line++; }
[^*\n]{16} |
[^*\n] /* do nothing */
"*"/[^/] /* do nothing */
}
<in_comment>"*/" { BEGIN(INITIAL); }
<in_struct_comment>"*/" { BEGIN(in_struct); }
["/] |
<in_struct_comment,in_comment>"*" {
error_at_line (&lexer_line,
"unterminated comment or string; unexpected EOF");
}
^{HWS}"#"{HWS}"define"{WS}"GTY(" /* do nothing */
%%
void
yybegin (const char *fname)
{
yyin = fopen (fname, "r");
if (yyin == NULL)
{
perror (fname);
exit (1);
}
lexer_line.file = input_file_by_name (fname);
lexer_line.line = 1;
}
void
yyend (void)
{
fclose (yyin);
}
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