swig/Examples/test-suite/director_pass_by_value.i
William S Fulton 71cd6a38fe Performance optimisation for directors for classes passed by value
The directorin typemaps in the director methods now use std::move on the
input parameter when copying the object from the stack to the heap prior
to the callback into the target language, thereby taking advantage of
move semantics if available.
2022-07-04 11:19:29 +01:00

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2 KiB
OpenEdge ABL

%module(directors="1") director_pass_by_value
#if defined(SWIGD)
%rename(trace) debug;
#endif
%director DirectorPassByValueAbstractBase;
%include "cpp11_move_only_helper.i"
%ignore PassedByValue::operator=;
%ignore PassedByValue::PassedByValue(PassedByValue &&);
%inline %{
#include <iostream>
using namespace std;
int debug = false;
struct PassedByValue {
PassedByValue(int v = 0x12345678) { val = v; if (debug) cout << "PassedByValue(0x" << hex << val << ")" << " " << this << endl; Counter::normal_constructor++; }
PassedByValue(const PassedByValue &other) { val = other.val; if (debug) cout << "PassedByValue(const PassedByValue &)" << " " << this << " " << &other << endl; Counter::copy_constructor++;}
PassedByValue & operator=(const PassedByValue &other) { val = other.val; if (debug) cout << "operator=(const PassedByValue &)" << " " << this << " " << &other << endl; Counter::copy_assignment++; return *this; }
#if __cplusplus >= 201103L
PassedByValue(PassedByValue &&other) noexcept { val = other.val; if (debug) cout << "PassedByValue(PassedByValue &&)" << " " << this << endl; Counter::move_constructor++; }
PassedByValue & operator=(PassedByValue &&other) noexcept { val = other.val; if (debug) cout << "operator=(PassedByValue &&)" << " " << this << endl; Counter::move_assignment++; return *this; }
~PassedByValue() { if (debug) cout << "~PassedByValue()" << " " << this << endl; Counter::destructor++; }
#endif
int getVal() { return val; }
private:
int val;
};
int doSomething(int x) {
int yy[256];
yy[0] =0x9876;
return yy[0];
}
class DirectorPassByValueAbstractBase {
public:
virtual void virtualMethod(PassedByValue pbv) = 0;
virtual void virtualConstMethod(const PassedByValue pbv) {}
virtual ~DirectorPassByValueAbstractBase () {}
};
class Caller {
public:
void call_virtualMethod(DirectorPassByValueAbstractBase &f) {
f.virtualMethod(PassedByValue());
}
};
bool has_cplusplus11() {
#if __cplusplus >= 201103L
return true;
#else
return false;
#endif
}
%}