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Simplify cast_op return type (#532)

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Using a complicated declval here was pointlessly complicated: we
already know the type, because that's what cast_op_type<T> is in the
first place.  (The declval also broke MSVC).
This commit is contained in:
Jason Rhinelander 2016-11-25 13:23:01 -05:00 committed by Wenzel Jakob
parent db86f7f285
commit 14bfe622f8
1 changed files with 2 additions and 4 deletions
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6
include/pybind11/cast.h
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@ -433,12 +433,10 @@ template <typename type, typename SFINAE = void> class type_caster : public type
template <typename type> using make_caster = type_caster<intrinsic_t<type>>; template <typename type> using make_caster = type_caster<intrinsic_t<type>>;
// Shortcut for calling a caster's `cast_op_type` cast operator for casting a type_caster to a T // Shortcut for calling a caster's `cast_op_type` cast operator for casting a type_caster to a T
template <typename T> template <typename T> typename make_caster<T>::template cast_op_type<T> cast_op(make_caster<T> &caster) {
auto cast_op(make_caster<T> &caster) -> decltype(caster.operator typename make_caster<T>::template cast_op_type<T>()) {
return caster.operator typename make_caster<T>::template cast_op_type<T>(); return caster.operator typename make_caster<T>::template cast_op_type<T>();
} }
template <typename T> template <typename T> typename make_caster<T>::template cast_op_type<T> cast_op(make_caster<T> &&caster) {
auto cast_op(make_caster<T> &&caster) -> decltype(caster.operator typename make_caster<T>::template cast_op_type<T>()) {
return cast_op<T>(caster); return cast_op<T>(caster);
} }