2402d,d的变参

fqbqrr2024-02-02 22:34

似乎我无法传递int参数给Variant函数参数.如何解决?

只需清楚告诉编译器你想要什么即可.

cpp 复制代码

import std;
void f(Variant x) {
    writeln(x);
}
void main() {
    f(Variant(42));
    f(Variant(2.5));
    f(Variant("Hi!"));
}

给它传递个带someFunction(Variant(myInt))的Variant.

或编写仅限于非变体的模板,来完成上述操作.

cpp 复制代码

auto someFunction(T)(T t)
if (!is(T : Variant))
{
    return someFunction(Variant(t));
}
auto someFunction(Variant v)
{
    //...
}
void main()
{
    someFunction(42);
    someFunction("hello");
    someFunction(3.14f);
    someFunction(true);
    someFunction(Variant(9001));
}