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__decltype is a GNU extension, not a C++11 extension. 

llvm-svn: 151377
This commit is contained in:
Richard Smith 2012-02-24 18:10:23 +00:00
parent 5e6842bfea
commit fd3da9358f
6 changed files with 12 additions and 7 deletions
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6
clang/include/clang/Basic/DiagnosticParseKinds.td
View File

@ -254,6 +254,12 @@ def err_missing_comma_before_ellipsis : Error<
"C requires a comma prior to the ellipsis in a variadic function type">;
def err_unexpected_typedef_ident : Error<
"unexpected type name %0: expected identifier">;
def ext_gnu_decltype : Extension<
"'__decltype' type specifier is a GNU extension">,
InGroup<GNU>, DefaultIgnore;
def warn_cxx98_compat_decltype : Warning<
"'decltype' type specifier is incompatible with C++98">,
InGroup<CXX98Compat>, DefaultIgnore;
def err_unexpected_scope_on_base_decltype : Error<
"unexpected namespace scope prior to decltype">;
def err_expected_class_name : Error<"expected class name">;

3
clang/include/clang/Basic/DiagnosticSemaKinds.td
View File

@ -1176,9 +1176,6 @@ def warn_cxx98_compat_temp_copy : Warning<
InGroup<CXX98CompatBindToTemporaryCopy>, DefaultIgnore;
// C++11 decltype
def warn_cxx98_compat_decltype : Warning<
"'decltype' type specifier is incompatible with C++98">,
InGroup<CXX98Compat>, DefaultIgnore;
def err_decltype_in_declarator : Error<
"'decltype' cannot be used to name a declaration">;

3
clang/lib/Parse/ParseDeclCXX.cpp
View File

@ -653,6 +653,9 @@ SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
return EndLoc;
}
} else {
Diag(Tok, Tok.getIdentifierInfo()->isStr("decltype")
? diag::warn_cxx98_compat_decltype : diag::ext_gnu_decltype);
ConsumeToken();
BalancedDelimiterTracker T(*this, tok::l_paren);

2
clang/lib/Sema/DeclSpec.cpp
View File

@ -898,8 +898,6 @@ void DeclSpec::Finish(DiagnosticsEngine &D, Preprocessor &PP) {
if (TypeSpecType == TST_char16 || TypeSpecType == TST_char32)
Diag(D, TSTLoc, diag::warn_cxx98_compat_unicode_type)
<< (TypeSpecType == TST_char16 ? "char16_t" : "char32_t");
if (TypeSpecType == TST_decltype)
Diag(D, TSTLoc, diag::warn_cxx98_compat_decltype);
if (Constexpr_specified)
Diag(D, ConstexprLoc, diag::warn_cxx98_compat_constexpr);

1
clang/test/SemaCXX/cxx98-compat.cpp
View File

@ -99,6 +99,7 @@ char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatibl
char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}}
constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}}
decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}}
__decltype(const_expr) decl_type2 = 0; // ok
void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}}
bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}}
void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}}

4
clang/test/SemaCXX/decltype-98.cpp
View File

@ -1,3 +1,3 @@
// RUN: %clang_cc1 -std=c++98 -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++98 -fsyntax-only -verify %s -Wgnu
extern int x;
__decltype(1) x = 3;
__decltype(1) x = 3; // expected-warning {{is a GNU extension}}