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Add missing testcase cpp11_template_parameters_decltype

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William S Fulton 2022-11-26 01:27:04 +00:00
commit 15692f0e89
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Examples/test-suite/cpp11_template_parameters_decltype.i Normal file
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%module cpp11_template_parameters_decltype
%include <std_string.i>
%include <std_vector.i>
%include <std_pair.i>
#pragma SWIG nowarn=SWIGWARN_CPP11_DECLTYPE
#if 0
// to fix (non-template expression equivalent to template expression further down):
%inline %{
#include <utility>
#include <vector>
void f(bool c = std::is_constructible<std::string, decltype(std::declval<std::vector<std::pair<int, int>>>().begin()->first)>::value) {}
%}
#endif
%inline %{
// Github issue #1590
struct Converter {
std::string to_json() const {}
};
struct Json {
Json(std::string s) {}
template < class T, class = decltype(&T::to_json) >
Json(const T & t) : Json(t.to_json()) {}
// Github issue #1589
// To fix
#if !defined(SWIG)
// Implicit constructor: map-like objects (std::map, std::unordered_map, etc)
template <class M, typename std::enable_if<
std::is_constructible<std::string, decltype(std::declval<M>().begin()->first)>::value,
int>::type = 0>
Json(const M & m) : Json(object(m.begin(), m.end())) {}
#endif
};
%}
// %template(Json) Json::Json<Converter>; // not working
%template(Json) Json::Json<Converter, std::string>; // workaround
%inline %{
// Github issue #1589
template <decltype(true) X = true>
void A() { }
%}
// %template(A) A<>; // not working
%template(A) A<true>; // workaround