函数没有使用的参数后加 __unused 可防止编译器报警告。 /*加上"__unused"可以防止编译器报警告:warning: unused parameter 'id' [-Wunused-parameter]*/intled_module_open(conststructhw_module_t* module,constchar* id __unused,structhw_device_t**device) { ... } 5. __maybe_unused 属性 定义的...
build may be incomplete A:make报错,make clean & make 编译警告处理 [-Wreorder] 规则:构造函数时,初始化成员变量顺序要与类声明中顺序对应...newline separated by space \ 连接字符串,\后面多了空格 [-Wunused-parameter] 有些变量声明了但暂时未使用可以注释掉;如果要保留,使用C++17语法 [[maybe_...
这段代码将编译器推向极限,同时我可能遇到了一些编译器错误。从GCC文档中,[maybe_unused]是从版本7开始实现的,但是如果使用这种方式: foo([[maybe_unused]] bool thing1)}; 现在,我对C++17知之甚少,不知道这个错 浏览0提问于2018-09-10得票数 14 回答已采纳...
gcc的编译属性和选项 1.指定内存默认对其参数：__attribute__((packed))：按⼀字节对其 __attribute__((aligned(n))):从此之后默认按n字节对其 例如：struct stu { int a; char b;}__attribute__((packed));struct stu { int a __attribute__((aligned(16))); char b;};例⼦ ...
#define __maybe_unused __attribute__((unused)) #define __always_unused __attribute__((unused)) 7)变量属性和类型属性 变量属性可以对变量或结构体成员进行属性设置,类型属性常见的属性有alignment、packed和sections等。 alignment属性规定变量或者结构体成员的最小对齐格式,以字节为单位。
[[maybe_unused]] attribute P0212R1 4.8 ([[gnu::unused]])7 (P0212R1) __has_cpp_attribute(maybe_unused) Extension to aggregate initialization P0017R1 7 __cpp_aggregate_bases >= 201603 Wording for constexpr lambda P0170R1 7 __cpp_constexpr >= 201603 Unary Folds and Empty Parameter Packs...
[[maybe_unused]] const auto mu = __builtin_expect( val, 0 ); } }; [[maybe_unused]] constexpr x x1{ 3 }; Bug: IntelliSense incorrectly reports the error: E0028 expression must have a constant value cannot call non-constexpr function “__builtin_expect” (decl...
gcc版本对C++标准的支持 gcc版本对C++标准的⽀持 C++ Standards Support in GCC GCC supports different dialects of C++, corresponding to the multiple published ISO standards. Which standard it implements can be selected using the -std= command-line option.For information about the status of the ...
C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C) 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL) STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST) C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C) 2: unused
unused-result -Wunused-value -Wunused-variable -Wno-varargs -Wvariadic-macros -Wvector-operation-performance -Wvla -Wvla-larger-than=byte-size -Wno-vla-larger-than -Wvolatile-register-var -Wwrite-strings -Wzero-length-bounds Static Analyzer Options -fanalyzer -fanalyzer-call-summaries -fanalyzer...