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Add workarounds for msvc-12.0 and earlier

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This commit is contained in:
Peter Dimov
2021-09-29 20:05:23 +03:00
parent dc6e3261ec
commit bebb7349ba
1 changed files with 86 additions and 0 deletions
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86
include/boost/core/type_name.hpp
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@ -37,6 +37,38 @@ template<class T> struct tn_identity
typedef T type;
};
// tn_enable_if
template<bool C, class T> struct tn_enable_if
{
};
template<class T> struct tn_enable_if<true, T>
{
typedef T type;
};
// tn_is_reference
template<class T> struct tn_is_reference
{
static const bool value = false;
};
template<class T> struct tn_is_reference<T&>
{
static const bool value = true;
};
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<class T> struct tn_is_reference<T&&>
{
static const bool value = true;
};
#endif
// typeid_name
template<class T> std::string typeid_name()
@ -148,6 +180,8 @@ template<class T> std::string type_name( tn_identity<T> )
// cv
#if !defined(BOOST_MSVC) || BOOST_MSVC >= 1900
template<class T> std::string type_name( tn_identity<T const> )
{
return type_name( tn_identity<T>() ) + " const";
@ -163,13 +197,51 @@ template<class T> std::string type_name( tn_identity<T const volatile> )
return type_name( tn_identity<T>() ) + " const volatile";
}
#else
template<class T>
typename tn_enable_if<!tn_is_reference<T>::value, std::string>::type
type_name( tn_identity<T const> )
{
return type_name( tn_identity<T>() ) + " const";
}
template<class T>
typename tn_enable_if<!tn_is_reference<T>::value, std::string>::type
type_name( tn_identity<T volatile> )
{
return type_name( tn_identity<T>() ) + " volatile";
}
template<class T>
typename tn_enable_if<!tn_is_reference<T>::value, std::string>::type
type_name( tn_identity<T const volatile> )
{
return type_name( tn_identity<T>() ) + " const volatile";
}
#endif
// refs
#if !defined(BOOST_MSVC) || BOOST_MSVC >= 1900
template<class T> std::string type_name( tn_identity<T&> )
{
return type_name( tn_identity<T>() ) + "&";
}
#else
template<class T>
typename tn_enable_if<!tn_is_reference<T>::value, std::string>::type
type_name( tn_identity<T&> )
{
return type_name( tn_identity<T>() ) + "&";
}
#endif
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
template<class T> std::string type_name( tn_identity<T&&> )
@ -367,6 +439,20 @@ template<template<class...> class L, class... T> std::string type_name( tn_ident
return tn + '<' + st + '>';
}
#else
template<template<class T1> class L, class T1> std::string type_name( tn_identity< L<T1> > )
{
std::string tn = class_template_name< L<T1> >();
return tn + '<' + type_name( tn_identity<T1>() ) + '>';
}
template<template<class T1, class T2> class L, class T1, class T2> std::string type_name( tn_identity< L<T1, T2> > )
{
std::string tn = class_template_name< L<T1, T2> >();
return tn + '<' + type_name( tn_identity<T1>() ) + ", " + type_name( tn_identity<T2>() ) + '>';
}
#endif
// sequence containers