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std::meta::is_namespace

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

Returns true if r represents an entity whose underlying entity is a namespace. Otherwise returns false.

Parameters

r - a reflection value

Return value

true if r represents a namespace; otherwise false.

Example

#include <meta>

static_assert(is_namespace(^^std));
static_assert(!is_namespace(^^int));

int main() {}

See also

is_namespace_alias
(C++26)
checks if reflection represents a namespace alias
(function)
is_namespace_member
(C++26)
checks if reflection represents a namespace member
(function)
current_namespace
(C++26)
returns a reflection of the enclosing namespace
(function)

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https://en.cppreference.com/cpp/meta/is_namespace

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