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[winpr,platform] add WINPR_ATTR_NODISCARD macro

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* add macro WINPR_ATTR_NODISCARD
* adjust C-23 checks for macros according to
  https://en.cppreference.com/w/c/language/attributes.html
This commit is contained in:
akallabeth
2026-01-23 13:15:46 +01:00
parent b3be45790c
commit 2501c274f5
1 changed files with 22 additions and 6 deletions
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28
winpr/include/winpr/platform.h
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@@ -59,7 +59,7 @@
#endif
// C23 related macros
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202311L)
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201904L)
#define WINPR_FALLTHROUGH \
(void)0; \
[[fallthrough]];
@@ -75,6 +75,17 @@
#define WINPR_FALLTHROUGH (void)0;
#endif
// C23 related macros
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202003L)
#define WINPR_ATTR_NODISCARD [[nodiscard]]
#elif defined(__clang__)
#define WINPR_ATTR_NODISCARD __attribute__((warn_unused_result))
#elif defined(__GNUC__) && (__GNUC__ >= 7)
#define WINPR_ATTR_NODISCARD __attribute__((warn_unused_result))
#else
#define WINPR_ATTR_NODISCARD
#endif
#if defined(__clang__)
#define WINPR_PRAGMA_DIAG_PUSH WINPR_DO_PRAGMA(clang diagnostic push)
#define WINPR_PRAGMA_DIAG_IGNORED_OVERLENGTH_STRINGS \
@@ -514,21 +525,26 @@ WINPR_PRAGMA_DIAG_IGNORED_RESERVED_ID_MACRO
WINPR_PRAGMA_DIAG_POP
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202311L)
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201904L)
#define WINPR_DEPRECATED(obj) [[deprecated]] obj
#define WINPR_DEPRECATED_VAR(text, obj) [[deprecated("[deprecated] " text)]] obj
#elif defined(__GNUC__)
#define WINPR_DEPRECATED(obj) obj __attribute__((deprecated))
#define WINPR_DEPRECATED_VAR(text, obj) obj __attribute__((deprecated("[deprecated] " text)))
#else
#define WINPR_DEPRECATED(obj) obj
#define WINPR_DEPRECATED_VAR(text, obj) obj
#endif
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 202202L)
#define WINPR_NORETURN(obj) [[noreturn]] obj
#elif defined(WIN32) && !defined(__CYGWIN__)
#define WINPR_DEPRECATED(obj) __declspec(deprecated) obj
#define WINPR_DEPRECATED_VAR(text, obj) __declspec(deprecated("[deprecated] " text)) obj
#define WINPR_NORETURN(obj) __declspec(noreturn) obj
#elif defined(__GNUC__)
#define WINPR_DEPRECATED(obj) obj __attribute__((deprecated))
#define WINPR_DEPRECATED_VAR(text, obj) obj __attribute__((deprecated("[deprecated] " text)))
#define WINPR_NORETURN(obj) __attribute__((__noreturn__)) obj
#else
#define WINPR_DEPRECATED(obj) obj
#define WINPR_DEPRECATED_VAR(text, obj) obj
#define WINPR_NORETURN(obj) obj
#endif