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Why constexpr is not working for const data member
Hi Refer code below: Trying ro create a functor and constructor as constexpr Whats wrong in this ? Does "const variable !=0" a const expression ? https://code.sololearn.com/cshO4CMzMYk0/?ref=app
3 Respuestas
0
No, deno is a const value in the ctor context but it can be any value.
Futhermore static_assert is for compile-time assertions then the condition has to be compile-time avaible expression .
Think it like a preprocessor macro
0
It seems static_assert is for template only... at max, it works for local scoped variable , but not for argument. even const ref argument is also not working
void check(const int& b)
{
const int a = 3;
static_assert(a!=0,"not zero");
}
a will work on static assert , but b woll not
0
I belive ,
void check(const int& b)
{
const int a = 3;
static_assert(b!=0,"not zero");
}c
above should work if check is called with either
1.rvalue
check(5);
Or
2.Const int
const int a = 7;
check(a);