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<type_traits>
true_type
class
<type_traits>
std::
true_type
typedef integral_constant<bool,true> true_type;
True type
Instantiation of
integral_constant
to represent the
bool
value
true
.
Member types
member type
definition
value_type
bool
type
true_type
Member functions
member function
definition
operator bool
Returns
true
See also
integral_constant
Integral constant
(class template )
false_type
False type
(class )
C++
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Reference
C library:
<cassert> (assert.h)
<cctype> (ctype.h)
<cerrno> (errno.h)
<cfenv> (fenv.h)
<cfloat> (float.h)
<cinttypes> (inttypes.h)
<ciso646> (iso646.h)
<climits> (limits.h)
<clocale> (locale.h)
<cmath> (math.h)
<csetjmp> (setjmp.h)
<csignal> (signal.h)
<cstdarg> (stdarg.h)
<cstdbool> (stdbool.h)
<cstddef> (stddef.h)
<cstdint> (stdint.h)
<cstdio> (stdio.h)
<cstdlib> (stdlib.h)
<cstring> (string.h)
<ctgmath> (tgmath.h)
<ctime> (time.h)
<cuchar> (uchar.h)
<cwchar> (wchar.h)
<cwctype> (wctype.h)
Containers:
<array>
<deque>
<forward_list>
<list>
<map>
<queue>
<set>
<stack>
<unordered_map>
<unordered_set>
<vector>
Input/Output:
<fstream>
<iomanip>
<ios>
<iosfwd>
<iostream>
<istream>
<ostream>
<sstream>
<streambuf>
Multi-threading:
<atomic>
<condition_variable>
<future>
<mutex>
<thread>
Other:
<algorithm>
<bitset>
<chrono>
<codecvt>
<complex>
<exception>
<functional>
<initializer_list>
<iterator>
<limits>
<locale>
<memory>
<new>
<numeric>
<random>
<ratio>
<regex>
<stdexcept>
<string>
<system_error>
<tuple>
<typeindex>
<typeinfo>
<type_traits>
<utility>
<valarray>
<type_traits>
helper classes:
false_type
integral_constant
true_type
type traits:
alignment_of
extent
has_virtual_destructor
is_abstract
is_arithmetic
is_array
is_assignable
is_base_of
is_class
is_compound
is_const
is_constructible
is_convertible
is_copy_assignable
is_copy_constructible
is_default_constructible
is_destructible
is_empty
is_enum
is_floating_point
is_function
is_fundamental
is_integral
is_literal_type
is_lvalue_reference
is_member_function_pointer
is_member_object_pointer
is_member_pointer
is_move_assignable
is_move_constructible
is_nothrow_assignable
is_nothrow_constructible
is_nothrow_copy_assignable
is_nothrow_copy_constructible
is_nothrow_default_constructible
is_nothrow_destructible
is_nothrow_move_assignable
is_nothrow_move_constructible
is_null_pointer
is_object
is_pod
is_pointer
is_polymorphic
is_reference
is_rvalue_reference
is_same
is_scalar
is_signed
is_standard_layout
is_trivial
is_trivially_assignable
is_trivially_constructible
is_trivially_copyable
is_trivially_copy_assignable
is_trivially_copy_constructible
is_trivially_default_constructible
is_trivially_destructible
is_trivially_move_assignable
is_trivially_move_constructible
is_union
is_unsigned
is_void
is_volatile
rank
type transformations:
add_const
add_cv
add_lvalue_reference
add_pointer
add_rvalue_reference
add_volatile
aligned_storage
aligned_union
common_type
conditional
decay
enable_if
make_signed
make_unsigned
remove_all_extents
remove_const
remove_cv
remove_extent
remove_pointer
remove_reference
remove_volatile
result_of
underlying_type