Fix unused private field warning in stdexcept after r207695. Add a new _LIBCPP_UNUSED define in __config, which can be used to indicate explicitly unused items, and apply it to the __imp__ field of __libcpp_refstring. Somebody who knows about Microsoft C++ and IBM C++ should fill in the unused attribute syntax appropriate for those compilers, if there is any. Differential Revision: http://reviews.llvm.org/D6836 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@228281 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config index 00ade4e..b109ad7 100644 --- a/include/__config +++ b/include/__config
@@ -258,6 +258,8 @@ # define _LIBCPP_NORETURN __attribute__ ((noreturn)) #endif +#define _LIBCPP_UNUSED __attribute__((__unused__)) + #if !(__has_feature(cxx_defaulted_functions)) #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS #endif // !(__has_feature(cxx_defaulted_functions)) @@ -380,6 +382,8 @@ #define _LIBCPP_NORETURN __attribute__((noreturn)) +#define _LIBCPP_UNUSED __attribute__((__unused__)) + #if _GNUC_VER >= 407 #define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T) #define _LIBCPP_IS_LITERAL(T) __is_literal_type(T) @@ -477,6 +481,7 @@ #define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS #define __alignof__ __alignof #define _LIBCPP_NORETURN __declspec(noreturn) +#define _LIBCPP_UNUSED #define _ALIGNAS(x) __declspec(align(x)) #define _LIBCPP_HAS_NO_VARIADICS @@ -500,6 +505,7 @@ #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x)))) #define _ATTRIBUTE(x) __attribute__((x)) #define _LIBCPP_NORETURN __attribute__((noreturn)) +#define _LIBCPP_UNUSED #define _NOEXCEPT throw() #define _NOEXCEPT_(x)
diff --git a/include/stdexcept b/include/stdexcept index 5fc912a..f251806 100644 --- a/include/stdexcept +++ b/include/stdexcept
@@ -53,7 +53,7 @@ #ifndef _LIBCPP___REFSTRING _LIBCPP_BEGIN_NAMESPACE_STD class _LIBCPP_HIDDEN __libcpp_refstring { - const char *__imp_; + const char *__imp_ _LIBCPP_UNUSED; }; _LIBCPP_END_NAMESPACE_STD #endif 