Utopia::DataIO::is_callable< F, Args > Struct Template Reference

Test whether an object is callable. More...

#include <monitor.hh>

Static Public Member Functions
template<class U >
static auto	test (U *p) -> decltype((*p)(std::declval< Args >()...), void(), std::true_type())
template<class U >
static auto	test (...) -> decltype(std::false_type())

Static Public Attributes
static constexpr bool	value = decltype(test< F >(0))::value

Detailed Description

template<class F, class... Args>
struct Utopia::DataIO::is_callable< F, Args >

Test whether an object is callable.

is_callable returns true for callable functions such as std::functions or lambdas. However, it returns false if an object only provides an operator(). This is necessary because otherwise types such as int or double would also return true (for this case use std::is_callable).

Template Parameters

F	The function
Args	The function arguments

Member Function Documentation

test() [1/2]

template<class F , class... Args>

template<class U >

static auto Utopia::DataIO::is_callable< F, Args >::test (   ... ) -> decltype(std::false_type())

static

test() [2/2]

template<class F , class... Args>

template<class U >

static auto Utopia::DataIO::is_callable< F, Args >::test ( U *  p ) -> decltype((*p)(std::declval< Args >()...), void(), std::true_type())

static

Member Data Documentation

value

template<class F , class... Args>

constexpr bool Utopia::DataIO::is_callable< F, Args >::value = decltype(test< F >(0))::value

staticconstexpr

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The documentation for this struct was generated from the following file:

• include/utopia/data_io/monitor.hh