std::meta::is_signed_type

 

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Checking string literals is_string_literal Types info meta::exception access_context data_member_options member_offset operators Concepts reflection_range Promoting to static storage reflect_constant_string reflect_constant_array define_static_string define_static_array define_static_object Operator representations operator_of symbol_of u8symbol_of Names and locations has_identifier identifier_of u8identifier_of display_string_of u8display_string_of source_location_of Reflection queries ➜ 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 Reflection layout queries offset_of size_of alignment_of bit_size_of Annotation reflection annotations_of annotations_of_with_type Value extraction extract Reflection substitution can_substitute substitute Expression result reflection reflect_constant reflect_object reflect_function Class definition generation data_member_spec is_data_member_spec define_aggregate

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Const-volatile modifications remove_const remove_volatile remove_cv add_const add_volatile add_cv Reference modifications remove_reference add_lvalue_reference add_rvalue_reference Sign modifications make_signed make_unsigned Array modifications remove_extent remove_all_extents Pointer modifications remove_pointer add_pointer Other transformations remove_cvref decay common_type common_reference underlying_type invoke_result unwrap_reference unwrap_ref_decay tuple_size tuple_element is_applicable_type is_nothrow_applicable_type apply_result variant_size variant_alternative type_order

 

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is_polymorphic_type is_abstract_type is_final_type is_aggregate_type is_structural_type is_signed_type is_unsigned_type is_bounded_array_type is_unbounded_array_type is_scoped_enum_type is_constructible_type is_trivially_constructible_type is_nothrow_constructible_type is_default_constructible_type is_trivially_default_constructible_type is_nothrow_default_constructible_type is_copy_constructible_type is_trivially_copy_constructible_type is_nothrow_copy_constructible_type is_move_constructible_type is_trivially_move_constructible_type is_nothrow_move_constructible_type is_assignable_type is_trivially_assignable_type is_nothrow_assignable_type is_copy_assignable_type is_trivially_copy_assignable_type is_nothrow_copy_assignable_type is_move_assignable_type is_trivially_move_assignable_type is_nothrow_move_assignable_type is_swappable_with_type is_swappable_type is_nothrow_swappable_with_type is_nothrow_swappable_type is_destructible_type is_trivially_destructible_type is_nothrow_destructible_type is_implicit_lifetime_type has_virtual_destructor has_unique_object_representations reference_constructs_from_temporary reference_converts_from_temporary Type property queries rank extent

 

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

See More

Returns true if r is a reflection of a signed arithmetic type. Otherwise returns false.

Parameters

r

-

a reflection value

Return value

true if r represents a signed arithmetic type; otherwise false.

Exceptions

Throws std::meta::exception if r does not represent a type or type alias.

Example

Run this code

#include <meta>

static_assert(""
    and is_signed_type(^^signed) == true
    and is_signed_type(^^unsigned) == false
    and is_signed_type(^^int) == true
    and is_signed_type(^^bool) == false
    and is_signed_type(^^float) == true
);

int main() {}

See also

is_unsigned_type (C++26)	checks if reflection represents an unsigned arithmetic type (function)
is_arithmetic_type (C++26)	checks if reflection represents an arithmetic type (function)
make_signed (C++26)	returns the corresponding signed type for reflected integral type (function)
is_signed (C++11)	checks if a type is a signed arithmetic type (class template)
is_arithmetic (C++11)	checks if a type is an arithmetic type (class template)
make_signed (C++11)	obtains the corresponding signed type for the given integral type (class template)
is_signed [static]	identifies signed types (public static member constant of std::numeric_limits<T>)