Hi I'm trying to overload the "+" and "-" operators for a struct but I get this error
test.d(47): Error: incompatible types for ((v1) - (v2)): 'Vecf!(1u)' and 'Vecf!(1u)' (the line corresponds to the last assert) doing something like this struct Vecf(uint n) { ... Vecf!n opBinary(string op)(Vecf!n other) if (op == "+" || op == "-") {...} } void main() { Vecf!1u v1 = Vecf!1u(3f); Vecf!1u v2 = Vecf!1u(5f); Vecf!1u r = Vecf!1u(-2f); assert ((v1.opBinary!"-"(v2)) == r); assert ((v1 - v2) == r); } removing the last assert or replacing (Vecf!n other) by (Vecf!1u other) in the function declaration works fine, but it's not what I want Any ideas? maybe I'm overloading the operators in the wrong way (it worked in a very similar test though)? Thanks!! Here's the full code: ------------------------------------------------------------------- module test; import std.stdio; struct Vecf(uint n) { float[n] data; this(float[n] args ...) { foreach (i, a; args) { data[i] = a; } } float opIndex(uint i) { return data[i]; } float opIndexAssign(float value, uint i) { data[i] = value; return value; } Vecf!n opBinary(string op)(Vecf!n other) if (op == "+" || op == "-") { Vecf!n ret; for (size_t i = 0; i < n; i++) { mixin("ret[i] = this[i] " ~ op ~ " other[i];"); } return ret; } } void main() { Vecf!1u v1 = Vecf!1u(3f); Vecf!1u v2 = Vecf!1u(5f); Vecf!1u r = Vecf!1u(-2f); assert ((v1.opBinary!"-"(v2)) == r); assert ((v1 - v2) == r); } --------------------------------------------------------------------------------------