16.03.2019 1:30, eXodiquas пишет:
On Friday, 15 March 2019 at 21:46:50 UTC, Ali Çehreli wrote:
On 03/15/2019 02:43 PM, Sebastiaan Koppe wrote:
On Friday, 15 March 2019 at 21:35:12 UTC, eXodiquas wrote:
Is there any way to achive this behaivour with D2?
Yep. Just make the return type in the function declaration `auto`.
You are then free to return a different type in each static branch.
Or use template constraints:
struct Vector {
Vector opBinary(string op)(Vector rhs)
if (op == "+") {
return Vector();
}
double opBinary(string op)(Vector rhs)
if (op == "/") {
return 0.5;
}
}
Ali
Thanks for the quick and simple answers, but I don't get this one. If I
do it that way the compiler doesn't know which function to call, or am I
doing something wrong?
Vector2 opBinary(string op)(Vector2 rhs) {
if (op == "+") {
return Vector2(this.x + rhs.x, this.y + rhs.y);
} else if (op == "-") {
return Vector2(this.x - rhs.x, this.y - rhs.y);
}
}
float opBinary(string op)(Vector2 rhs) {
if (op == "*") {
return this.x * rhs.x + this.y * rhs.y;
}
}
This gives me the error:
overloads (Vector2 rhs) and (Vector2 rhs) both match argument list for
opBinary
eXodiquas
You add wrong braces (`if` here is part of method signature not its body):
```
Vector2 opBinary(string op)(Vector2 rhs) if (op == "+")
{
return Vector2(this.x + rhs.x, this.y + rhs.y);
}
Vector2 opBinary(string op)(Vector2 rhs) if (op == "-")
{
return Vector2(this.x - rhs.x, this.y - rhs.y);
}
float opBinary(string op)(Vector2 rhs) if (op == "*")
{
return this.x * rhs.x + this.y * rhs.y;
}
```
