If aconstexprvariable is nottranslation-unit-local, it should not be initialized to refer to a translation-unit-local entity that is usable in constant expressions, nor have a subobject that refers to such an entity. Such initialization is disallowed in amodule interface unit(outside its privat...
the compound statement of the constructor body must satisfy the constraints for the body of a constexpr function for the constructor of a class or struct, every base class sub-object and every non-variant non-static data member must be initialized. If the class is a union-like class, for ...
class X { public: static constexpr bool constexprFoo() { return true; } template<class T> T foo() { if constexpr (constexprFoo()) {} return {}; } } 1>TestConstexpr.cpp 1>C:\home\c\TestConstexpr\TestConstexpr.cpp(12,35): error C2131: expression did not evaluate to ...
6.4.1/2 [如果成立则终止]如果if语句的格式为if constexpr [...]如果转换后的条件的值为false，...
But if you change the size of the array arrayA to something small like 1 in /O2 it will output the right value. Clang in -O0 and -O2 will output 16. trying to use ASAN ( clang and MSVC), there is an error of stack-use-after-scope, which would explain the issue, bu...
If the asm-specification is present, returns a STRING_CST corresponding to the string-literal. Otherwise, returns @@ -29650,9 +29696,7 @@ cp_parser_asm_specification_opt (cp_parser* parser) parens.require_open (parser); /* Look for the string-literal. */ ...
Nope, that's the case for const but constexpr is a different fish: "9.4.2/3 A static data member of literal type can be declared in the class definition with the constexpr specifier; if so, its declaration shall specify a brace-or-equal-initializer in which every initializer-clau...
{ &&e - &&b < x; } | ^ code_2.c:1:13: error: use of GNU address-of-label extension [-Werror,-Wgnu-label-as-value] 1 | x() { &&e - &&b < x; } | ^ code_2.c:1:11: error: arithmetic on pointers to void is a GNU extension [-Werror,-Wgnu-pointer-arith] 1 | ...
expression must have a constant value cannot call non-constexpr function “__builtin_expect” (declared implicitly) Originally reported for the C/C++ extension for VS Code at https://github.com/Microsoft/vscode-cpptools/issues/2824Visual Studiowindows 10.0C++editorvisual studio ...
Nope, that's the case for const but constexpr is a different fish: "9.4.2/3 A static data member of literal type can be declared in the class definition with the constexpr specifier; if so, its declaration shall specify a brace-or-equal-initializer in which every initializer-...