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util/BindMethod: merge structs {Method,Function}WrapperGenerator into one

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Max Kellermann 2021-12-03 08:06:57 +01:00 committed by Max Kellermann
parent c693e4aa64
commit 26dc37bd76
1 changed files with 12 additions and 21 deletions
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33
src/util/BindMethod.hxx
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@ -124,48 +124,39 @@ struct FunctionSignatureHelper<R (*)(Args...) noexcept(NoExcept)> {
/**
* Generate a wrapper function.
*
* @param method the method pointer
* @param method the method/function pointer
*/
template<typename M, auto method>
struct BindMethodWrapperGenerator;
struct WrapperGenerator;
template<typename T, bool NoExcept,
auto method, typename R, typename... Args>
struct BindMethodWrapperGenerator<R (T::*)(Args...) noexcept(NoExcept), method> {
struct WrapperGenerator<R (T::*)(Args...) noexcept(NoExcept), method> {
static R Invoke(void *_instance, Args... args) noexcept(NoExcept) {
auto &t = *(T *)_instance;
return (t.*method)(std::forward<Args>(args)...);
}
};
template<auto function, bool NoExcept, typename R, typename... Args>
struct WrapperGenerator<R (*)(Args...) noexcept(NoExcept), function> {
static R Invoke(void *, Args... args) noexcept(NoExcept) {
return function(std::forward<Args>(args)...);
}
};
template<auto method>
typename MethodSignatureHelper<decltype(method)>::function_pointer
MakeBindMethodWrapper() noexcept
{
return BindMethodWrapperGenerator<decltype(method), method>::Invoke;
return WrapperGenerator<decltype(method), method>::Invoke;
}
/**
* Generate a wrapper function.
*
* @param F the function pointer type
* @param function the function pointer
*/
template<typename F, auto function>
struct BindFunctionWrapperGenerator;
template<auto function, bool NoExcept, typename R, typename... Args>
struct BindFunctionWrapperGenerator<R (*)(Args...) noexcept(NoExcept), function> {
static R Invoke(void *, Args... args) noexcept(NoExcept) {
return function(std::forward<Args>(args)...);
}
};
template<auto function>
typename FunctionSignatureHelper<decltype(function)>::function_pointer
MakeBindFunctionWrapper() noexcept
{
return BindFunctionWrapperGenerator<decltype(function), function>::Invoke;
return WrapperGenerator<decltype(function), function>::Invoke;
}
} /* namespace BindMethodDetail */