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Below are the changes for the current release.
See the CHANGES file for changes in older releases.
See the RELEASENOTES file for a summary of changes in each release.
Issue # numbers mentioned below can be found on Github. For more details, add
the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.2.0 (in progress)
===========================
2023-02-15: wsfulton
#1300 Further partial template specialization fixes.
Fixes when templates are used as a template parameter in a partially specialized
instantiation such as:
template<typename V> struct Vect {};
template<class T, typename TT> class Foo { ... };
template<class TS, typename TTS> class Foo<Vect<TS>, TTS> { ... };
%template(VectInt) Vect<int>;
%template(FooVectIntDouble) Foo<Vect<int>, double>; // was previously attempting to use primary template
Also fixes partial specialization where the same template parameter name is used twice,
for example:
template<typename X, typename Y> struct H { ... };
template<typename T> struct H<T, T> { ... };
%template(HInts) H<int, int>; // was previously attempting to use primary template
2023-01-27: jschueller
#2492 [python] Fix unused parameter warnings for self parameter in
generated C/C++ wrapper code.
2023-01-14: wsfulton
Fix deduction of partially specialized template parameters when the specialized
parameter is non-trivial, used in a wrapped method and the type to %template uses
typedefs. For example:
typedef double & DoubleRef;
template <typename T> struct XX {};
template <typename T> struct XX<T &> { void fn(T t) {} };
%template(XXD) XX<DoubleRef>;
The type of the parameter in the instantiated template for fn is now correctly deduced
as double.
2023-01-03: wsfulton
#983 Fix seg fault when instantiating templates with parameters that are function
parameters containing templates, such as:
%template(MyC) C<int(std::vector<int>)>;
2023-01-03: wsfulton
Complete support for C++11 variadic function templates. Support was previously limited
to just one template parameter. Now zero or more template parameters are supported
in the %template instantiation.
2022-12-29: wsfulton
#1863 Syntax error fixes parsing more elaborate parameter pack arguments that are
used in function pointers, member function pointers:
template <typename... V> struct VariadicParms {
void ParmsFuncPtrPtr(int (*)(V*...)) {}
void ParmsFuncPtrPtrRef(int (*)(V*&...)) {}
void ParmsFuncPtrPtrRValueRef(int (*)(V*&&...)) {}
void ParmsFuncPtrRef(int (*)(V&...)) {}
void ParmsFuncPtrRValueRef(int (*)(V&&...)) {}
void ParmsMemFuncPtrPtr(int (KlassMemFuncs::*)(V*...)) {}
void ParmsMemFuncPtrPtrRef(int (KlassMemFuncs::*)(V*&...)) {}
void ParmsMemFuncPtrPtrRValueRef(int (KlassMemFuncs::*)(V*&&...)) {}
void ParmsMemFuncPtrRef(int (KlassMemFuncs::*)(V&...)) {}
void ParmsMemFuncPtrRValueRef(int (KlassMemFuncs::*)(V&&...)) {}
};
%template(VariadicParms0) VariadicParms<>;
%template(VariadicParms1) VariadicParms<A>;
Also in various other places such as within noexcept specifiers:
template<typename T, typename... Args>
void emplace(Args &&... args) noexcept(
std::is_nothrow_constructible<T, Args &&...>::value);
2022-12-27: wsfulton
Fix instantiation of variadic class templates containing parameter pack arguments that
are function pointers.
template <typename... V> struct VariadicParms {
void ParmsFuncPtrVal(int (*)(V...)) {}
};
%template(VariadicParms0) VariadicParms<>;
%template(VariadicParms1) VariadicParms<A>;
2022-12-23: wsfulton
#1863 Fix syntax error parsing variadic templates containing parameter pack arguments that
are function pointers.
2022-12-22: wsfulton
Complete support for C++11 variadic class templates. Support was previously limited
to just one template parameter. Now zero or more template parameters are supported.
2022-12-06: wsfulton
#1636 Fix syntax error for misplaced Doxygen comment after struct/class member.
Fix syntax error using Doxygen member groups syntax, "///*}", when used after
final struct/class member.
2022-12-05: wsfulton
#2023 Fix garbled Doxygen post comments in parameter lists.
Fix syntax error parsing a trailing Doxygen comment in parameter lists.
2022-12-03: wsfulton
#1609 Fix syntax error parsing of Doxygen comments after last enum item.
2022-12-03: wsfulton
#1715 Fix syntax error parsing of unconventionally placed Doxygen post
comments for enum items.
2022-12-02: wsfulton
#624 #1021 Improved template template parameters support. Previously, specifying more
than one simple template template parameter resulted in a parse error. Now
multiple template template parameters are working including instantiation with
%template. Example:
template <template<template<class> class, class> class Op, template<class> class X, class Y>
class C { ... };
2022-11-26: wsfulton
#1589 #1590 Slightly better decltype() support for expressions, such as:
int i,j;
... decltype(i+j) ...
... decltype(&i) ...
These result in a warning for non-trivial expressions which SWIG cannot evaluate:
Warning 344: Unable to deduce decltype for 'i+j'.
See 'Type Inference' in CPlusPlus.html for workarounds.
2022-11-22: wsfulton
#1037 Fix seg fault handling template parameter expressions containing '<='
or '>='.
2022-11-18: wsfulton
Duplicate class template instantiations via %template now issue a warning and are ignored.
%template(Aint) A<int>;
%template(Aint2) A<int>; // Now ignored and issues a warning
example.i:7: Warning 404: Duplicate template instantiation of 'A< int >' with name 'Aint2' ignored,
example.i:6: Warning 404: previous instantiation of 'A< int >' with name 'Aint'.
A single empty template instantiation before a named instantiation is the one exception
for allowing duplicate template instantiations as the empty template instantation does not
create a wrapper for the template, it merely adds the instantiation into SWIG's internal
type system.
Duplicate empty template instantiations are quietly ignored.
%template() B<int>;
%template(Bint) B<int>; // OK
%template() C<int>;
%template() C<int>; // Quietly ignored now
%template(Cint) C<int>; // OK
Note that default template parameters are considered when looking for duplicates such as:
template <typename T, typename U = short> struct D {};
%template(Dint) D<int>;
%template(Dintshort) D<int, short>;
example.i:7: Warning 404: Duplicate template instantiation of 'D< int,short >' with name 'Dintshort' ignored,
example.i:6: Warning 404: previous instantiation of 'D< int >' with name 'Dint'.
Note that the following always was ignored, but that was because the chosen name was a
duplicate rather than the template being a duplicate:
%template(Eint) E<int>;
%template(Eint) E<int>; // Always has been ignored as a redefined identifier
The old warning was:
example.i:7: Warning 302: Identifier 'Eint' redefined (ignored) (Renamed from 'E< int >'),
example.i:6: Warning 302: previous definition of 'Eint' (Renamed from 'E< int >').
*** POTENTIAL INCOMPATIBILITY ***
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