X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8ea6525e3a092b76256fbed7d6edbb0a1861aee1..026816664ff8283a55f91915843a8ff0ac5cf86c:/src/scan-gram.l?ds=inline
diff --git a/src/scan-gram.l b/src/scan-gram.l
index 8e48148c..555e6952 100644
--- a/src/scan-gram.l
+++ b/src/scan-gram.l
@@ -1,6 +1,6 @@
/* Bison Grammar Scanner -*- C -*-
- Copyright (C) 2002-2012 Free Software Foundation, Inc.
+ Copyright (C) 2002-2013 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
@@ -17,7 +17,7 @@
You should have received a copy of the GNU General Public License
along with this program. If not, see . */
-%option debug nodefault noinput nounput noyywrap never-interactive
+%option debug nodefault noinput noyywrap never-interactive
%option prefix="gram_" outfile="lex.yy.c"
%{
@@ -31,6 +31,7 @@
#include
#include
+#include
#include
#include
#include
@@ -73,6 +74,15 @@ static size_t no_cr_read (FILE *, char *, size_t);
yyless (0); \
} while (0)
+#define DEPRECATED(Msg) \
+ do { \
+ size_t i; \
+ deprecated_directive (loc, yytext, Msg); \
+ scanner_cursor.column -= mbsnwidth (Msg, strlen (Msg), 0); \
+ for (i = strlen (Msg); i != 0; --i) \
+ unput (Msg[i - 1]); \
+ } while (0)
+
/* A string representing the most recently saved token. */
static char *last_string;
@@ -102,7 +112,12 @@ 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 complex tag, with nested angles brackets. */
+
+ /* POSIX says that a tag must be both an id and a C union member, but
+ historically almost any character is allowed in a tag. We
+ disallow NUL, as this simplifies our implementation. We match
+ angle brackets in nested pairs: several languages use them for
+ generics/template types. */
%x SC_TAG
/* Four types of user code:
@@ -119,21 +134,18 @@ static void unexpected_newline (boundary, char const *);
%x SC_BRACKETED_ID SC_RETURN_BRACKETED_ID
letter [.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]
+notletter [^.abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_]{-}[%\{]
id {letter}({letter}|[-0-9])*
-directive %{id}
int [0-9]+
-/* POSIX says that a tag must be both an id and a C union member, but
- historically almost any character is allowed in a tag. We disallow
- NUL, as this simplifies our implementation. We disallow angle
- bracket to match them in nested pairs: several languages use them
- for generics/template types. */
-tag [^\0<>]+
-
/* Zero or more instances of backslash-newline. Following GCC, allow
white space between the backslash and the newline. */
splice (\\[ \f\t\v]*\n)*
+/* An equal sign, with optional leading whitespaces. This is used in some
+ deprecated constructs. */
+eqopt ([[:space:]]*=)?
+
%%
%{
/* Nesting level. Either for nested braces, or nested angle brackets
@@ -168,7 +180,7 @@ splice (\\[ \f\t\v]*\n)*
complain (loc, Wother, _("stray ',' treated as white space"));
}
[ \f\n\t\v] |
- "//".* ;
+ "//".* continue;
"/*" {
token_start = loc->start;
context_state = YY_START;
@@ -177,7 +189,7 @@ splice (\\[ \f\t\v]*\n)*
/* #line directives are not documented, and may be withdrawn or
modified in future versions of Bison. */
- ^"#line "{int}" \"".*"\"\n" {
+ ^"#line "{int}(" \"".*"\"")?"\n" {
handle_syncline (yytext + sizeof "#line " - 1, *loc);
}
}
@@ -198,16 +210,17 @@ splice (\\[ \f\t\v]*\n)*
"%binary" return PERCENT_NONASSOC;
"%code" return PERCENT_CODE;
"%debug" RETURN_PERCENT_FLAG("parse.trace");
- "%default"[-_]"prec" return PERCENT_DEFAULT_PREC;
+ "%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;
+ "%empty" return PERCENT_EMPTY;
+ "%error-verbose" return PERCENT_ERROR_VERBOSE;
"%expect" return PERCENT_EXPECT;
- "%expect"[-_]"rr" return PERCENT_EXPECT_RR;
+ "%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" return PERCENT_INITIAL_ACTION;
"%glr-parser" return PERCENT_GLR_PARSER;
"%language" return PERCENT_LANGUAGE;
@@ -215,9 +228,9 @@ splice (\\[ \f\t\v]*\n)*
"%lex-param" RETURN_PERCENT_PARAM(lex);
"%locations" RETURN_PERCENT_FLAG("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;
+ "%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;
@@ -227,20 +240,33 @@ splice (\\[ \f\t\v]*\n)*
"%prec" return PERCENT_PREC;
"%precedence" return PERCENT_PRECEDENCE;
"%printer" return PERCENT_PRINTER;
- "%pure"[-_]"parser" RETURN_PERCENT_FLAG("api.pure");
+ "%pure-parser" RETURN_PERCENT_FLAG("api.pure");
"%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;
+ "%token-table" return PERCENT_TOKEN_TABLE;
"%type" return PERCENT_TYPE;
"%union" return PERCENT_UNION;
"%verbose" return PERCENT_VERBOSE;
"%yacc" return PERCENT_YACC;
- {directive} {
+ /* deprecated */
+ "%default"[-_]"prec" DEPRECATED("%default-prec");
+ "%error"[-_]"verbose" DEPRECATED("%define parse.error verbose");
+ "%expect"[-_]"rr" DEPRECATED("%expect-rr");
+ "%file-prefix"{eqopt} DEPRECATED("%file-prefix");
+ "%fixed"[-_]"output"[-_]"files" DEPRECATED("%fixed-output-files");
+ "%name"[-_]"prefix"{eqopt} DEPRECATED("%name-prefix");
+ "%no"[-_]"default"[-_]"prec" DEPRECATED("%no-default-prec");
+ "%no"[-_]"lines" DEPRECATED("%no-lines");
+ "%output"{eqopt} DEPRECATED("%output");
+ "%pure"[-_]"parser" DEPRECATED("%pure-parser");
+ "%token"[-_]"table" DEPRECATED("%token-table");
+
+ "%"{id} {
complain (loc, complaint, _("invalid directive: %s"), quote (yytext));
}
@@ -297,13 +323,6 @@ splice (\\[ \f\t\v]*\n)*
/* A type. */
"<*>" return TAG_ANY;
"<>" return TAG_NONE;
- "<"{tag}">" {
- obstack_grow (&obstack_for_string, yytext + 1, yyleng - 2);
- STRING_FINISH;
- val->uniqstr = uniqstr_new (last_string);
- STRING_FREE;
- return TAG;
- }
"<" {
nesting = 0;
token_start = loc->start;
@@ -324,8 +343,10 @@ splice (\\[ \f\t\v]*\n)*
BEGIN SC_BRACKETED_ID;
}
- . {
- complain (loc, complaint, _("invalid character: %s"), quote (yytext));
+ [^\[%A-Za-z0-9_<>{}\"\'*;|=/, \f\n\t\v]+|. {
+ complain (loc, complaint, "%s: %s",
+ ngettext ("invalid character", "invalid characters", yyleng),
+ quote_mem (yytext, yyleng));
}
<> {
@@ -419,10 +440,14 @@ splice (\\[ \f\t\v]*\n)*
else
complain (loc, complaint, _("an identifier expected"));
}
- . {
- complain (loc, complaint, _("invalid character in bracketed name: %s"),
- quote (yytext));
+
+ [^\].A-Za-z0-9_/ \f\n\t\v]+|. {
+ complain (loc, complaint, "%s: %s",
+ ngettext ("invalid character in bracketed name",
+ "invalid characters in bracketed name", yyleng),
+ quote_mem (yytext, yyleng));
}
+
<> {
BEGIN bracketed_id_context_state;
unexpected_eof (bracketed_id_start, "]");
@@ -449,7 +474,7 @@ splice (\\[ \f\t\v]*\n)*
{
"*/" BEGIN context_state;
- .|\n ;
+ .|\n continue;
<> unexpected_eof (token_start, "*/"); BEGIN context_state;
}
@@ -484,23 +509,15 @@ splice (\\[ \f\t\v]*\n)*
{
- "\""|"\n" {
- if (yytext[0] == '\n')
- unexpected_newline (token_start, "\"");
- STRING_FINISH;
- loc->start = token_start;
- val->chars = last_string;
- BEGIN INITIAL;
- return STRING;
- }
- <> {
- unexpected_eof (token_start, "\"");
+ "\"" {
STRING_FINISH;
loc->start = token_start;
- val->chars = last_string;
+ val->code = last_string;
BEGIN INITIAL;
return STRING;
}
+ <> unexpected_eof (token_start, "\"");
+ "\n" unexpected_newline (token_start, "\"");
}
/*----------------------------------------------------------.
@@ -510,55 +527,34 @@ splice (\\[ \f\t\v]*\n)*
{
- "'"|"\n" {
+ "'" {
STRING_FINISH;
loc->start = token_start;
val->character = last_string[0];
+
+ /* FIXME: Eventually, make these errors. */
+ if (last_string[0] == '\0')
{
- /* FIXME: Eventually, make these errors. */
- if (last_string[0] == '\0')
- {
- complain (loc, Wother, _("empty character literal"));
- /* '\0' seems dangerous even if we are about to complain. */
- val->character = '\'';
- }
- else if (last_string[1] != '\0')
- complain (loc, Wother,
- _("extra characters in character literal"));
+ complain (loc, Wother, _("empty character literal"));
+ /* '\0' seems dangerous even if we are about to complain. */
+ val->character = '\'';
}
- if (yytext[0] == '\n')
- unexpected_newline (token_start, "'");
- STRING_FREE;
- BEGIN INITIAL;
- return CHAR;
- }
- <> {
- STRING_FINISH;
- loc->start = token_start;
- val->character = last_string[0];
- {
- /* FIXME: Eventually, make these errors. */
- if (last_string[0] == '\0')
- {
- complain (loc, Wother, _("empty character literal"));
- /* '\0' seems dangerous even if we are about to complain. */
- val->character = '\'';
- }
- else if (last_string[1] != '\0')
- complain (loc, Wother,
- _("extra characters in character literal"));
- }
- unexpected_eof (token_start, "'");
+ else if (last_string[1] != '\0')
+ complain (loc, Wother,
+ _("extra characters in character literal"));
STRING_FREE;
BEGIN INITIAL;
return CHAR;
}
+ "\n" unexpected_newline (token_start, "'");
+ <> unexpected_eof (token_start, "'");
}
- /*-----------------------------------------------------------.
- | Scanning a Bison nested tag. The initial angle bracket is |
- | already eaten. |
- `-----------------------------------------------------------*/
+
+
+ /*--------------------------------------------------------------.
+ | Scanning a tag. The initial angle bracket is already eaten. |
+ `--------------------------------------------------------------*/
{
@@ -576,18 +572,10 @@ splice (\\[ \f\t\v]*\n)*
STRING_GROW;
}
- [^<>]+ STRING_GROW;
+ ([^<>]|->)+ STRING_GROW;
"<"+ STRING_GROW; nesting += yyleng;
- <> {
- unexpected_eof (token_start, ">");
- STRING_FINISH;
- loc->start = token_start;
- val->uniqstr = uniqstr_new (last_string);
- STRING_FREE;
- BEGIN INITIAL;
- return TAG;
- }
+ <> unexpected_eof (token_start, ">");
}
/*----------------------------.
@@ -658,15 +646,15 @@ splice (\\[ \f\t\v]*\n)*
{
"'" STRING_GROW; BEGIN context_state;
- \n unexpected_newline (token_start, "'"); BEGIN context_state;
- <> unexpected_eof (token_start, "'"); BEGIN context_state;
+ \n unexpected_newline (token_start, "'");
+ <> unexpected_eof (token_start, "'");
}
{
"\"" STRING_GROW; BEGIN context_state;
- \n unexpected_newline (token_start, "\""); BEGIN context_state;
- <> unexpected_eof (token_start, "\""); BEGIN context_state;
+ \n unexpected_newline (token_start, "\"");
+ <> unexpected_eof (token_start, "\"");
}
@@ -717,15 +705,7 @@ splice (\\[ \f\t\v]*\n)*
(as '<' '<%'). */
"<"{splice}"<" STRING_GROW;
- <> {
- int token = (YY_START == SC_BRACED_CODE) ? BRACED_CODE : BRACED_PREDICATE;
- unexpected_eof (code_start, "}");
- STRING_FINISH;
- loc->start = code_start;
- val->code = last_string;
- BEGIN INITIAL;
- return token;
- }
+ <> unexpected_eof (code_start, "}");
}
@@ -771,19 +751,12 @@ splice (\\[ \f\t\v]*\n)*
"%}" {
STRING_FINISH;
loc->start = code_start;
- val->chars = last_string;
+ val->code = last_string;
BEGIN INITIAL;
return PROLOGUE;
}
- <> {
- unexpected_eof (code_start, "%}");
- STRING_FINISH;
- loc->start = code_start;
- val->chars = last_string;
- BEGIN INITIAL;
- return PROLOGUE;
- }
+ <> unexpected_eof (code_start, "%}");
}
@@ -797,7 +770,7 @@ splice (\\[ \f\t\v]*\n)*
<> {
STRING_FINISH;
loc->start = code_start;
- val->chars = last_string;
+ val->code = last_string;
BEGIN INITIAL;
return EPILOGUE;
}
@@ -939,31 +912,35 @@ convert_ucn_to_byte (char const *ucn)
}
-/*----------------------------------------------------------------.
-| Handle '#line INT "FILE"'. ARGS has already skipped '#line '. |
-`----------------------------------------------------------------*/
+/*---------------------------------------------------------------------.
+| Handle '#line INT( "FILE")?\n'. ARGS has already skipped '#line '. |
+`---------------------------------------------------------------------*/
static void
handle_syncline (char *args, location loc)
{
- char *after_num;
- unsigned long int lineno = strtoul (args, &after_num, 10);
- char *file = strchr (after_num, '"') + 1;
- *strchr (file, '"') = '\0';
+ char *file;
+ unsigned long int lineno = strtoul (args, &file, 10);
if (INT_MAX <= lineno)
{
complain (&loc, Wother, _("line number overflow"));
lineno = INT_MAX;
}
- current_file = uniqstr_new (file);
+
+ file = strchr (file, '"');
+ if (file)
+ {
+ *strchr (file + 1, '"') = '\0';
+ current_file = uniqstr_new (file + 1);
+ }
boundary_set (&scanner_cursor, current_file, lineno, 1);
}
/*----------------------------------------------------------------.
| For a token or comment starting at START, report message MSGID, |
-| which should say that an end marker was found before |
-| the expected TOKEN_END. |
+| which should say that an end marker was found before the |
+| expected TOKEN_END. Then, pretend that TOKEN_END was found. |
`----------------------------------------------------------------*/
static void
@@ -972,8 +949,17 @@ unexpected_end (boundary start, char const *msgid, char const *token_end)
location loc;
loc.start = start;
loc.end = scanner_cursor;
+ size_t i = strlen (token_end);
+
+/* Adjust scanner cursor so that any later message does not count
+ the characters about to be inserted. */
+ scanner_cursor.column -= i;
+
+ while (i != 0)
+ unput (token_end[--i]);
+
token_end = quote (token_end);
- // Instead of '\'', display "'".
+ /* Instead of '\'', display "'". */
if (STREQ (token_end, "'\\''"))
token_end = "\"'\"";
complain (&loc, complaint, _(msgid), token_end);
@@ -983,6 +969,7 @@ unexpected_end (boundary start, char const *msgid, char const *token_end)
/*------------------------------------------------------------------------.
| Report an unexpected EOF in a token or comment starting at START. |
| An end of file was encountered and the expected TOKEN_END was missing. |
+| After reporting the problem, pretend that TOKEN_END was found. |
`------------------------------------------------------------------------*/
static void