opt_classresults

Controls the omission of the copy constructor call for class return types if all return statements in a function return the same local class object.

Syntax

  #pragma opt_classresults on | off | reset

Remarks

Example #pragma opt_classresults shows an example.

Listing 1. Example #pragma opt_classresults

#pragma opt_classresults on

struct X {
  X();
  X(const X&);
  // ...
};

X f() {
  X x; // Object x will be constructed in function result buffer.
  // ...
  return x; // Copy constructor is not called.
}

This pragma does not correspond to any panel setting. By default, this pragma is on .