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| author | Joseph Myers <joseph@codesourcery.com> | 2019-11-14 20:18:33 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2019-11-14 20:18:33 +0000 |
| commit | 7c5890cc0a0ecea0e88cc39e9fba6385fb579e61 (patch) | |
| tree | f751de7e59697865e2ffa028877728284227c355 /gcc/c-family | |
| parent | 3771033244b3ee1b53a8a00d734580b16384fdd3 (diff) | |
| download | gcc-7c5890cc0a0ecea0e88cc39e9fba6385fb579e61.zip gcc-7c5890cc0a0ecea0e88cc39e9fba6385fb579e61.tar.gz gcc-7c5890cc0a0ecea0e88cc39e9fba6385fb579e61.tar.bz2 | |
Support UTF-8 character constants for C2x.
C2x adds u8'' character constants to C. This patch adds the
corresponding GCC support.
Most of the support was already present for C++ and just needed
enabling for C2x. However, in C2x these constants have type unsigned
char, which required corresponding adjustments in the compiler and the
preprocessor to give them that type for C.
For C, it seems clear to me that having type unsigned char means the
constants are unsigned in the preprocessor (and thus treated as having
type uintmax_t in #if conditionals), so this patch implements that. I
included a conditional in the libcpp change to avoid affecting
signedness for C++, but I'm not sure if in fact these constants should
also be unsigned in the preprocessor for C++ in which case that
!CPP_OPTION (pfile, cplusplus) conditional would not be needed.
Bootstrapped with no regressions on x86_64-pc-linux-gnu.
gcc/c:
* c-parser.c (c_parser_postfix_expression)
(c_parser_check_literal_zero): Handle CPP_UTF8CHAR.
* gimple-parser.c (c_parser_gimple_postfix_expression): Likewise.
gcc/c-family:
* c-lex.c (lex_charconst): Make CPP_UTF8CHAR constants unsigned
char for C.
gcc/testsuite:
* gcc.dg/c11-utf8char-1.c, gcc.dg/c2x-utf8char-1.c,
gcc.dg/c2x-utf8char-2.c, gcc.dg/c2x-utf8char-3.c,
gcc.dg/gnu2x-utf8char-1.c: New tests.
libcpp:
* charset.c (narrow_str_to_charconst): Make CPP_UTF8CHAR constants
unsigned for C.
* init.c (lang_defaults): Set utf8_char_literals for GNUC2X and
STDC2X.
From-SVN: r278265
Diffstat (limited to 'gcc/c-family')
| -rw-r--r-- | gcc/c-family/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/c-family/c-lex.c | 4 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 336159d..f4fdccc 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,8 @@ +2019-11-14 Joseph Myers <joseph@codesourcery.com> + + * c-lex.c (lex_charconst): Make CPP_UTF8CHAR constants unsigned + char for C. + 2019-11-14 Jakub Jelinek <jakub@redhat.com> * c-omp.c (c_omp_check_context_selector): Add nvidia to the list of diff --git a/gcc/c-family/c-lex.c b/gcc/c-family/c-lex.c index 42010a7..d446633f 100644 --- a/gcc/c-family/c-lex.c +++ b/gcc/c-family/c-lex.c @@ -1376,7 +1376,9 @@ lex_charconst (const cpp_token *token) type = char16_type_node; else if (token->type == CPP_UTF8CHAR) { - if (flag_char8_t) + if (!c_dialect_cxx ()) + type = unsigned_char_type_node; + else if (flag_char8_t) type = char8_type_node; else type = char_type_node; |