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std::in_range
Defined in header <utility> |
||
---|---|---|
|
(since C++20) |
Returns true
if the value of t
is in the range of values that can be represented in R
, that is, if t
can be converted to R
in a value-preserving manner.
It is a compile-time error if either T
or U
is a non-integer type, a character type, or bool.
Parameters
t | - | value to test |
Return value
true
if the value of t
is representable in R
, false
otherwise.
Possible implementation
|
Notes
This function cannot be used with enums (including std::byte
), char, char8_t, char16_t, char32_t, wchar_t and bool.
Feature-test macro | Value | Std | Feature |
---|---|---|---|
__cpp_lib_integer_comparison_functions |
202002L | (C++20) | Integer comparison functions |
Example
#include <iostream>
#include <utility>
int main()
{
std::cout << std::boolalpha;
std::cout << std::in_range<std::size_t>(-1) << '\n';
std::cout << std::in_range<std::size_t>(42) << '\n';
}
Output:
false
true
See also
(C++20)
|
returns the smaller of the given values (niebloid) |
(C++20)
|
returns the greater of the given values (niebloid) |
(C++20)
|
clamps a value between a pair of boundary values (niebloid) |
(C++20)
|
linear interpolation function (function) |
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