std::meta::is_explicit

 

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Member accessibility queries is_accessible has_inaccessible_nonstatic_   data_members has_inaccessible_bases has_inaccessible_subobjects      Scope identification current_function current_class current_namespace Reflection member queries members_of bases_of static_data_members_of nonstatic_data_members_of subobjects_of enumerators_of Annotation reflection annotations_of annotations_of_with_type Value extraction extract Reflection substitution reflection_range can_substitute substitute Expression result reflection reflect_constant reflect_object reflect_function Class definition generation data_member_options data_member_spec is_data_member_spec define_aggregate

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Reflection queries type_of object_of constant_of is_public is_protected is_private is_virtual is_pure_virtual is_override is_final is_deleted is_defaulted is_user_provided is_user_declared is_explicit is_noexcept is_bit_field is_enumerator is_annotation is_const is_volatile is_mutable_member is_lvalue_reference_qualified is_rvalue_reference_qualified has_static_storage_duration has_thread_storage_duration has_automatic_storage_duration      has_internal_linkage has_module_linkage has_external_linkage has_c_language_linkage has_linkage is_complete_type is_enumerable_type is_variable is_type is_namespace is_type_alias is_namespace_alias is_function is_conversion_function is_operator_function is_literal_operator is_special_member_function is_constructor is_default_constructor is_copy_constructor

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Defined in header <meta>
consteval bool is_explicit( std::meta::info r );		(since C++26)

Returns true if r represents an explicit constructor or conversion function. Otherwise returns false.

Parameters

r

-

a reflection value

Return value

true if r represents a member function that is declared explicit; otherwise false.

Notes

If r does not represent a function, the result is false. In particular, the result is false if r represents a function template.

Example

Run this code

#include <meta>

struct A {
    explicit operator bool() const;

    template<class T>
    explicit(^^T == ^^void) operator T*() const;
};

static_assert(std::meta::is_explicit(^^A::operator bool));
static_assert(std::meta::is_explicit(^^A::operator void*));
static_assert(!std::meta::is_explicit(^^A::operator int*));

See also

is_function (C++26)

checks if reflection represents a function (function)