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Fix overloading of shared_ptr method overloading

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Add 'equivalent' attribute to typecheck typemap.
Closes #1098.
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William S Fulton 2017-09-23 14:46:44 +01:00
commit ed4b84f4d3
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@ -7,6 +7,36 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.0.0 (in progress)
===========================
2017-09-23: wsfulton
Issue #1098. Fix overloading of shared_ptr with underlying pointer types, eg:
void m(std::shared_ptr<T> p);
void m(T &p);
void m(T *p);
Only the first method is wrapped and the others are ignored/shadowed.
The implementation is done via a new attribute in the 'typecheck' typemap called
'equivalent'. If specified, it must contain the equivalent pointer type for overloading
and can only be used for the special SWIG_TYPECHECK_POINTER precedence level.
The shared_ptr 'typecheck' typemaps have been modified accordingly.
Here is a simplified version:
%typemap(typecheck, precedence=SWIG_TYPECHECK_POINTER, equivalent="T *")
T,
T CONST &,
T CONST *,
T *CONST&,
std::shared_ptr< T >,
std::shared_ptr< T > &,
std::shared_ptr< T > *,
std::shared_ptr< T > *&
{ ... }
Overloading with any of these types will result in SWIG ignoring all but the first
overloaded method by default. Without the 'equivalent' attribute, wrapping the overloaded
methods resulted in types being shadowed (scripting languages) or code that did not
compile (statically typed languages).
2017-09-19: futatuki
[Python] #1003 Add --with-2to3=/path/to/2to3 option to configure.