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Add support for friend templates, including operator overloading.

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Closes #196.
This commit is contained in:
William S Fulton 2015-05-04 10:01:34 +01:00
commit 428b6176df
10 changed files with 146 additions and 3 deletions
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Examples/test-suite/friends_template.i Normal file
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%module friends_template
%{
template <typename Type> class MyClass;
template <typename Type> int operator<<(double un, const MyClass <Type> & x) { return 0; }
template <typename Type> int funk_hidden(double is, MyClass <Type> & x) { return 2; }
template <typename T> T template_friend_hidden(T t) { return t + 1; }
%}
%inline %{
template <typename Type> int operator>>(double is, MyClass <Type> & x) { return 1; }
template <typename Type> int funk_seen(double is, MyClass <Type> & x) { return 2; }
template <typename T> T template_friend_seen(T t1, T t2) { return t1 + t2; }
int friend_plain_seen(int i) { return i; }
template <class Type> class MyClass
{
friend int operator<< <Type>(double un, const MyClass <Type> & x);
friend int operator>> <Type>(double is, MyClass <Type> & x);
friend int funk_hidden <Type>(double is, MyClass <Type> & x);
friend int funk_seen <Type>(double is, MyClass <Type> & x);
};
struct MyTemplate {
template <typename T> friend T template_friend_hidden(T);
template <typename T> friend T template_friend_seen(T, T);
friend int friend_plain_seen(int i);
};
MyClass<int> makeMyClassInt() { return MyClass<int>(); }
%}
// Although the friends in MyClass are automatically instantiated via %template(MyClassDouble) MyClass<int>,
// the operator friends are not valid and hence %rename is needed.
%rename(OperatorInputDouble) operator>> <double>;
%rename(OperatorOutputDouble) operator<< <double>;
%template(MyClassDouble) MyClass<double>;
%template(TemplateFriendHiddenInt) template_friend_hidden<int>;
%template(TemplateFriendSeenInt) template_friend_seen<int>;
// These have no %template(XX) MyClass<int> to instantiate, but they can be instantiated separately...
%template(OperatorInputInt) operator>> <int>;
%template(OperatorFunkSeenInt) funk_seen <int>;