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tool return tweaks

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This commit is contained in:
Kelvin Sherlock 2016-08-05 20:56:24 -04:00
parent c509148aec
commit a0768ec3c7
1 changed files with 53 additions and 35 deletions
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88
macos/tool_return.h
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@ -48,6 +48,53 @@ namespace MacOS {
}
};
class void_tool_return : public tool_return_base {
public:
typedef void value_type;
void_tool_return() = default;
void_tool_return(macos_error error) : tool_return_base(error)
{}
void_tool_return &operator=(macos_error error)
{
_error = error;
return *this;
}
template<class F, typename RT = typename std::result_of<F(void_tool_return)>::type>
void then(F &&f, typename std::enable_if<std::is_void<RT>::value>::type* = 0) {
f(std::move(*this));
}
template<class F, typename RT = typename std::result_of<F(void_tool_return)>::type>
RT then(F &&f, typename std::enable_if<!std::is_void<RT>::value>::type* = 0) {
return f(std::move(*this));
}
template<class F, typename RT = typename std::result_of<F()>::type>
typename tool_return_type<RT>::type
map(F &&f, typename std::enable_if<std::is_void<RT>::value>::type* = 0) {
if (_error) return _error;
f();
//return tool_return<void>();
return noErr;
}
template<class F, typename RT = typename std::result_of<F()>::type>
typename tool_return_type<RT>::type
map(F &&f, typename std::enable_if<!std::is_void<RT>::value>::type* = 0) {
if (_error) return _error;
return f();
}
};
} // namespace
@ -142,12 +189,12 @@ namespace MacOS {
return _value;
}
template<class F, typename RT = typename std::result_of<F(tool_return<T>)>::type>
template<class F, typename RT = typename std::result_of<F(tool_return)>::type>
void then(F &&f, typename std::enable_if<std::is_void<RT>::value>::type* = 0) {
f(std::move(*this));
}
template<class F, typename RT = typename std::result_of<F(tool_return<T>)>::type>
template<class F, typename RT = typename std::result_of<F(tool_return)>::type>
RT then(F &&f, typename std::enable_if<!std::is_void<RT>::value>::type* = 0) {
return f(std::move(*this));
}
@ -171,43 +218,14 @@ namespace MacOS {
};
template<>
class tool_return<void> : public internal::tool_return_base
{
public:
typedef void value_type;
tool_return() = default;
tool_return(macos_error error) : tool_return_base(error)
{}
tool_return &operator=(macos_error error)
{
_error = error;
return *this;
}
class tool_return<void> : public internal::void_tool_return {
public: using void_tool_return::void_tool_return;
};
template<>
class tool_return<macos_error> : public internal::tool_return_base
{
public:
typedef void value_type;
tool_return() = default;
tool_return(macos_error error) : tool_return_base(error)
{}
tool_return &operator=(macos_error error)
{
_error = error;
return *this;
}
class tool_return<macos_error> : public internal::void_tool_return {
public: using void_tool_return::void_tool_return;
};