can_convertToString< X > Struct Template Reference

#include "lib/meta/util.hpp"

Description

template<typename X>
struct lib::meta::can_convertToString< X >

detect possibility of a conversion to string.

Naive implementation, which first attempts to build a string instance by implicit conversion, and then tries to invoke an explicit string conversion. The embedded constant #value will be true in case any of this succeeds. Might fail in more tricky situations (references, const, volatile)

See also

format-obj.hpp more elaborate solution including lexical_cast

Definition at line 172 of file meta/util.hpp.

Static Public Member Functions
template<class XX >
static Yes_t	check_explicit (Probe< XX > *)
template<class >
static No_t	check_explicit (...)
static Yes_t	check_implicit (std::string)
static Yes_t	check_implicit (std::string_view)
static Yes_t	check_implicit (const char *)
static No_t	check_implicit (...)

Static Public Attributes
static const bool	value

Classes
struct	Probe

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Class Documentation

lib::meta::can_convertToString::Probe

struct lib::meta::can_convertToString::Probe

Collaboration diagram for can_convertToString< X >::Probe< XX, i >:

Member Data Documentation

value

const bool value

static

Initial value:

= (sizeof(Yes_t)==sizeof(check_implicit (std::declval<X>())))
                             or (sizeof(Yes_t)==sizeof(check_explicit<X>(0)))

Definition at line 191 of file meta/util.hpp.

Collaboration diagram for can_convertToString< X >:

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

• meta/util.hpp