xieite ::iscntrl ()
Defined in header <xieite/data/iscntrl.hpp> An improved replacement and extension of
std ::iscntrl ()Declarations
#0Checks if a single character is a control character (not printable).[[nodiscard ]]constexpr bool iscntrl (xieite ::is_char auto c )noexcept ;
#1
Checks if a string consists only of control characters.template <xieite ::is_char Char ,typename Traits > [[nodiscard ]]constexpr bool iscntrl (std ::basic_string_view <Char ,Traits >strv )noexcept ;
#2
Defers to #1 after deducingtemplate <xieite ::is_char Char ,typename Traits ,typename Alloc > [[nodiscard ]]constexpr bool iscntrl (const std ::basic_string_view <Char ,Traits ,Alloc >& str )noexcept ;
Char #2
Defers to #1 after deducingtemplate <xieite ::is_char Char ,std ::size_t length > [[nodiscard ]]constexpr bool iscntrl (const xieite ::paren <Char [length ]>& str )noexcept ;
Char Example
[View in Compiler Explorer]static_assert (xieite ::iscntrl ('\n' ));static_assert (not xieite ::iscntrl ('a' ));