opAssign overload question

[gedaiu]

Hi folks,

i have this struct:

import std.stdio, std.string;

struct Value {

	private long intVal;
	private bool boolVal;
         private string type;

         Value opAssign(long val) {
		intVal = val;
		
		if(val == 0) {
			boolVal = false;
		} else {
			boolVal = true;
		}

		type = "LONG";
		
		return this;
	}

     Value opAssign(bool val) {
		if(val) {
			boolVal = true;
			intVal = 1;
		} else {
			boolVal = false;
			intVal = 0;
		}
	
		type = "BOOL";
		
		return this;
	}

	string getType() {
		return type;
	}

}

int main() {
     Value data;
	data = 1;
	
	writeln(data);
	writeln(data.getType());

	assert(data.getType() == "LONG");
	
	return 0;
}

output:
Value(1, true, "BOOL")
BOOL


Can anyone tell me why the compiler call opAssign(bool val) and 
not opAssign(long val). I am passing an long value not a bool one.

Thanks,
Bogdan