.net - Selecting overload with tracking reference -


in c#, can have code following:

void add(vector3 a, vector3 b, out vector3 c) {   add(ref a, ref b, out c); }  void add(ref vector3 a, ref vector3 b, out vector3 c) {   c.x = a.x + b.x;   c.y = a.y + b.y;   c.z = a.z + b.z; }

however, in c++/cli, compiler (understandably) not able select correct overload:

void add(vector3 a, vector3 b, [out] vector3% c) {   add(a, b, c); }  void add(vector3% a, vector3% b, [out] vector3% c) {   c.x = a.x + b.x;   c.y = a.y + b.y;   c.z = a.z + b.z; }

how indicate compiler want select second overload?

as hans passant said in comment post, not possible. point of value types should small enough efficient copy, , if aren't, should not value types. there therefore no need second overload in cases.

edit: hans said not true. generates (almost) exact same il c# version (the difference adds modopt([mscorlib]system.runtime.compilerservices.isexplicitlydereferenced)):

void add(vector3 a, vector3 b, [out] vector3% c) {   add(&a, &b, c); }  void add(interior_ptr<vector3> a, interior_ptr<vector3> b, [out] vector3% c) {   c.x = a->x + b->x;   c.y = a->y + b->y;   c.z = a->z + b->z; }

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