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diagnostics: complain about Bison directives when -Wyacc

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* src/complain.h, src/complain.c (bison_directive): New.
* src/scan-gram.l (BISON_DIRECTIVE): New.
Use it for Bison extensions.
This commit is contained in:
Akim Demaille
2013-02-27 15:43:26 +01:00
committed by Akim Demaille
parent ebe9b20841
commit d92ed9d9f7
6 changed files with 62 additions and 34 deletions
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8
src/complain.c
View File

@@ -374,6 +374,14 @@ complain_args (location const *loc, warnings w, unsigned *indent,
}
}
void
bison_directive (location const *loc, char const *directive)
{
complain (loc, Wyacc,
_("POSIX Yacc does not support %s"), directive);
}
void
deprecated_directive (location const *loc, char const *old, char const *upd)
{

3
src/complain.h
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@@ -119,6 +119,9 @@ void complain_indent (location const *loc, warnings flags, unsigned *indent,
__attribute__ ((__format__ (__printf__, 4, 5)));
/** GNU Bison extension not valid with POSIX Yacc. */
void bison_directive (location const *loc, char const *directive);
/** Report an obsolete syntax, suggest the updated one. */
void deprecated_directive (location const *loc,
char const *obsolete, char const *updated);

62
src/scan-gram.l
View File

@@ -53,6 +53,10 @@ static boundary scanner_cursor;
static size_t no_cr_read (FILE *, char *, size_t);
#define YY_INPUT(buf, result, size) ((result) = no_cr_read (yyin, buf, size))
/* Report that yytext is an extension, and evaluate to its token type. */
#define BISON_DIRECTIVE(Directive) \
(bison_directive (loc, yytext), PERCENT_ ## Directive)
#define RETURN_PERCENT_PARAM(Value) \
RETURN_VALUE(PERCENT_PARAM, param_ ## Value)
@@ -214,49 +218,49 @@ eqopt ([[:space:]]*=)?
<INITIAL>
{
"%binary" return PERCENT_NONASSOC;
"%code" return PERCENT_CODE;
"%binary" return BISON_DIRECTIVE(NONASSOC);
"%code" return BISON_DIRECTIVE(CODE);
"%debug" RETURN_PERCENT_FLAG("parse.trace");
"%default-prec" return PERCENT_DEFAULT_PREC;
"%define" return PERCENT_DEFINE;
"%defines" return PERCENT_DEFINES;
"%destructor" return PERCENT_DESTRUCTOR;
"%dprec" return PERCENT_DPREC;
"%empty" return PERCENT_EMPTY;
"%expect" return PERCENT_EXPECT;
"%expect-rr" return PERCENT_EXPECT_RR;
"%file-prefix" return PERCENT_FILE_PREFIX;
"%fixed-output-files" return PERCENT_YACC;
"%initial-action" return PERCENT_INITIAL_ACTION;
"%glr-parser" return PERCENT_GLR_PARSER;
"%language" return PERCENT_LANGUAGE;
"%default-prec" return BISON_DIRECTIVE(DEFAULT_PREC);
"%define" return BISON_DIRECTIVE(DEFINE);
"%defines" return BISON_DIRECTIVE(DEFINES);
"%destructor" return BISON_DIRECTIVE(DESTRUCTOR);
"%dprec" return BISON_DIRECTIVE(DPREC);
"%empty" return BISON_DIRECTIVE(EMPTY);
"%expect" return BISON_DIRECTIVE(EXPECT);
"%expect-rr" return BISON_DIRECTIVE(EXPECT_RR);
"%file-prefix" return BISON_DIRECTIVE(FILE_PREFIX);
"%fixed-output-files" return BISON_DIRECTIVE(YACC);
"%initial-action" return BISON_DIRECTIVE(INITIAL_ACTION);
"%glr-parser" return BISON_DIRECTIVE(GLR_PARSER);
"%language" return BISON_DIRECTIVE(LANGUAGE);
"%left" return PERCENT_LEFT;
"%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;
"%merge" return BISON_DIRECTIVE(MERGE);
"%name-prefix" return BISON_DIRECTIVE(NAME_PREFIX);
"%no-default-prec" return BISON_DIRECTIVE(NO_DEFAULT_PREC);
"%no-lines" return BISON_DIRECTIVE(NO_LINES);
"%nonassoc" return PERCENT_NONASSOC;
"%nondeterministic-parser" return PERCENT_NONDETERMINISTIC_PARSER;
"%output" return PERCENT_OUTPUT;
"%nondeterministic-parser" return BISON_DIRECTIVE(NONDETERMINISTIC_PARSER);
"%output" return BISON_DIRECTIVE(OUTPUT);
"%param" RETURN_PERCENT_PARAM(both);
"%parse-param" RETURN_PERCENT_PARAM(parse);
"%prec" return PERCENT_PREC;
"%precedence" return PERCENT_PRECEDENCE;
"%printer" return PERCENT_PRINTER;
"%precedence" return BISON_DIRECTIVE(PRECEDENCE);
"%printer" return BISON_DIRECTIVE(PRINTER);
"%pure-parser" RETURN_PERCENT_FLAG("api.pure");
"%require" return PERCENT_REQUIRE;
"%require" return BISON_DIRECTIVE(REQUIRE);
"%right" return PERCENT_RIGHT;
"%skeleton" return PERCENT_SKELETON;
"%skeleton" return BISON_DIRECTIVE(SKELETON);
"%start" return PERCENT_START;
"%term" return PERCENT_TOKEN;
"%term" return BISON_DIRECTIVE(TOKEN);
"%token" return PERCENT_TOKEN;
"%token-table" return PERCENT_TOKEN_TABLE;
"%token-table" return BISON_DIRECTIVE(TOKEN_TABLE);
"%type" return PERCENT_TYPE;
"%union" return PERCENT_UNION;
"%verbose" return PERCENT_VERBOSE;
"%yacc" return PERCENT_YACC;
"%verbose" return BISON_DIRECTIVE(VERBOSE);
"%yacc" return BISON_DIRECTIVE(YACC);
/* Deprecated since Bison 3.0 (2013-07-25), but the warning is
issued only since Bison 3.3. */

17
tests/input.at
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@@ -433,7 +433,13 @@ input.y:26.40-42: warning: unset value: $][$ [-Wother]
AT_BISON_CHECK([-Wnone,yacc -fcaret input.y],
[0], [],
[[input.y:24.23-34: warning: POSIX Yacc does not support typed midrule actions [-Wyacc]
[m4_ifval([$1], [], [[input.y:3.1-11: warning: POSIX Yacc does not support %destructor [-Wyacc]
%destructor { destroy ($$); } <integer>;
^^^^^^^^^^^
]])[input.y:13.10-15: warning: POSIX Yacc does not support %empty [-Wyacc]
b: INT | %empty;
^^^^^^
input.y:24.23-34: warning: POSIX Yacc does not support typed midrule actions [-Wyacc]
m: INT | INT <integer>{ $][$ = $][1; } INT <integer>{ $][$ = $][2 + $][3; } INT { $][$ = $][4 + $][5; };
^^^^^^^^^^^^
input.y:24.49-65: warning: POSIX Yacc does not support typed midrule actions [-Wyacc]
@@ -451,7 +457,10 @@ input.y:26.23-25: warning: POSIX Yacc does not support typed midrule actions [-W
input.y:26.40-42: warning: POSIX Yacc does not support typed midrule actions [-Wyacc]
o: INT | INT <integer>{ } INT <integer>{ } INT { $][$ = $][1 + $][2 + $][3 + $][4 + $][5; };
^^^
]])
]m4_ifval([$1], [[input.y:30.1-11: warning: POSIX Yacc does not support %destructor [-Wyacc]
%destructor { destroy ($$); } <integer>;
^^^^^^^^^^^
]])])
])
## --------------- ##
@@ -1169,7 +1178,9 @@ AT_BISON_OPTION_POPDEFS
# POSIX Yacc accept periods, but not dashes.
AT_BISON_CHECK([--yacc input.y], [1], [],
[[input.y:9.8-16: error: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Werror=yacc]
[[input.y:1.1-5: error: POSIX Yacc does not support %code [-Werror=yacc]
input.y:9.8-16: error: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Werror=yacc]
input.y:13.1-5: error: POSIX Yacc does not support %code [-Werror=yacc]
input.y:20.8-16: error: POSIX Yacc forbids dashes in symbol names: with-dash [-Werror=yacc]
]])

2
tests/output.at
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@@ -44,7 +44,7 @@ done
]AT_DATA([$1],
[$2[
%%
foo: %empty {};
foo: '0' {};
]])
# There is not AT_DATA_UNQUOTED.

4
tests/regression.at
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@@ -88,7 +88,9 @@ AT_SETUP([Early token definitions with --yacc])
# prologue, so that they can use the token definitions in it.
AT_BISON_OPTION_PUSHDEFS
AT_DATA_GRAMMAR([input.y],
# Not AT_DATA_GRAMMAR, which uses %code, which is not supported by Yacc.
AT_DATA([input.y],
[[%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[