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，...
public static void main(String[] args) {List l1 = new ArrayList();List l2 = new ArrayList()...
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. */ ...
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 there is no special problem, I would like to use constexpr and all other new features I understood. So I just tested this feature by the above example. If I could not use it here, I would like to know why, because I learned something wrong. If it is just a problem of VC++...
{ &&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 | ...
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...