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parser: warn about string literals in Yacc mode

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* src/scan-gram.l (scan_integer): Warn.
* tests/input.at (Yacc warnings on symbols): Check.
This commit is contained in:
Akim Demaille
2018-12-13 18:26:24 +01:00
parent 953a95695a
commit 465a47d46b
2 changed files with 12 additions and 0 deletions
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2
src/scan-gram.l
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@@ -521,6 +521,8 @@ eqopt ([[:space:]]*=)?
STRING_FINISH; STRING_FINISH;
BEGIN INITIAL; BEGIN INITIAL;
loc->start = token_start; loc->start = token_start;
complain (loc, Wyacc,
_("POSIX Yacc does not support string literals"));
RETURN_VALUE (STRING, last_string); RETURN_VALUE (STRING, last_string);
} }
<<EOF>> unexpected_eof (token_start, "\""); <<EOF>> unexpected_eof (token_start, "\"");

10
tests/input.at
View File

@@ -150,6 +150,12 @@ AT_BISON_CHECK([-fcaret -Wyacc input.y], [0], [],
input.y:2.12-15: warning: POSIX Yacc does not support hexadecimal literals [-Wyacc] input.y:2.12-15: warning: POSIX Yacc does not support hexadecimal literals [-Wyacc]
%token NUM 0x40 "number" %token NUM 0x40 "number"
^^^^ ^^^^
input.y:2.17-24: warning: POSIX Yacc does not support string literals [-Wyacc]
%token NUM 0x40 "number"
^^^^^^^^
input.y:4.6-13: warning: POSIX Yacc does not support string literals [-Wyacc]
exp: "number";
^^^^^^^^
]]) ]])
AT_CLEANUP AT_CLEANUP
@@ -1283,8 +1289,12 @@ AT_BISON_OPTION_POPDEFS
AT_BISON_CHECK([--yacc input.y], [1], [], AT_BISON_CHECK([--yacc input.y], [1], [],
[[input.y:1.1-5: error: POSIX Yacc does not support %code [-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:9.8-16: error: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Werror=yacc]
input.y:10.21-34: error: POSIX Yacc does not support string literals [-Werror=yacc]
input.y:12.23-38: error: POSIX Yacc does not support string literals [-Werror=yacc]
input.y:13.1-5: error: POSIX Yacc does not support %code [-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] input.y:20.8-16: error: POSIX Yacc forbids dashes in symbol names: with-dash [-Werror=yacc]
input.y:22.15-28: error: POSIX Yacc does not support string literals [-Werror=yacc]
input.y:24.17-32: error: POSIX Yacc does not support string literals [-Werror=yacc]
]]) ]])
# Dashes are fine for GNU Bison. # Dashes are fine for GNU Bison.