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author | Marek Polacek <polacek@redhat.com> | 2022-04-28 16:50:06 -0400 |
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committer | Marek Polacek <polacek@redhat.com> | 2022-04-29 15:07:57 -0400 |
commit | fd0d3e9121c5aa65150d242676be6bbdc8d4a92a (patch) | |
tree | 12f441f0f0de04633a08e1d00e26d6988b6c19a0 /gcc | |
parent | 8d0fcf135857869f7cff36d29bc3527c482372a9 (diff) | |
download | gcc-fd0d3e9121c5aa65150d242676be6bbdc8d4a92a.zip gcc-fd0d3e9121c5aa65150d242676be6bbdc8d4a92a.tar.gz gcc-fd0d3e9121c5aa65150d242676be6bbdc8d4a92a.tar.bz2 |
c++: pedwarn for empty unnamed enum in decl [PR67048]
[dcl.dcl]/5 says that
enum { };
is ill-formed, and since r197742 we issue a pedwarn. However, the
pedwarn also fires for
enum { } x;
which is well-formed. So only warn when {} is followed by a ;. This
should be correct since you can't have "enum {}, <whatever>" -- that
produces "expected unqualified-id before ',' token".
PR c++/67048
gcc/cp/ChangeLog:
* parser.cc (cp_parser_enum_specifier): Warn about empty unnamed enum
only when it's followed by a semicolon.
gcc/testsuite/ChangeLog:
* g++.dg/cpp0x/enum42.C: New test.
Diffstat (limited to 'gcc')
-rw-r--r-- | gcc/cp/parser.cc | 4 | ||||
-rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/enum42.C | 7 |
2 files changed, 10 insertions, 1 deletions
diff --git a/gcc/cp/parser.cc b/gcc/cp/parser.cc index ee69934..a5cbb3e 100644 --- a/gcc/cp/parser.cc +++ b/gcc/cp/parser.cc @@ -21012,7 +21012,9 @@ cp_parser_enum_specifier (cp_parser* parser) /* If the next token is not '}', then there are some enumerators. */ else if (cp_lexer_next_token_is (parser->lexer, CPP_CLOSE_BRACE)) { - if (is_unnamed && !scoped_enum_p) + if (is_unnamed && !scoped_enum_p + /* Don't warn for enum {} a; here. */ + && cp_lexer_nth_token_is (parser->lexer, 2, CPP_SEMICOLON)) pedwarn (type_start_token->location, OPT_Wpedantic, "ISO C++ forbids empty unnamed enum"); } diff --git a/gcc/testsuite/g++.dg/cpp0x/enum42.C b/gcc/testsuite/g++.dg/cpp0x/enum42.C new file mode 100644 index 0000000..05b372a --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/enum42.C @@ -0,0 +1,7 @@ +// PR c++/67048 +// { dg-do compile { target c++11 } } +// { dg-options -Wpedantic } + +typedef enum {} X; +enum {} x; +enum {} y, z; |