cppreference.com
Create account
Log in
Namespaces
Page
Discussion
Variants
Views
View
Edit
History
Actions
std::
iswdigit
From cppreference.com
<
cpp
|
string
|
wide
C++
Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros
(C++20)
Language support library
Concepts library
(C++20)
Diagnostics library
Memory management library
Metaprogramming library
(C++11)
General utilities library
Containers library
Iterators library
Ranges library
(C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library
(C++17)
Concurrency support library
(C++11)
Execution control library
(C++26)
Technical specifications
Symbols index
External libraries
[edit]
Text processing library
Localization library
Regular expressions library
(C++11)
Formatting library
(C++20)
Null-terminated sequence utilities
Byte strings
Multibyte strings
Wide strings
Primitive numeric conversions
to_chars
(C++17)
to_chars_result
(C++17)
from_chars
(C++17)
from_chars_result
(C++17)
chars_format
(C++17)
Text encoding identifications
text_encoding
(C++26)
[edit]
Null-terminated wide strings
Functions
Character classification
iswalnum
iswalpha
iswlower
iswupper
iswdigit
iswxdigit
wctype
iswblank
(C++11)
iswctype
iswcntrl
iswgraph
iswspace
iswprint
iswpunct
Character manipulation
towlower
towupper
towctrans
wctrans
Conversions to numeric formats
wcstol
wcstoll
(C++11)
wcstof
wcstod
wcstold
(C++11)
(C++11)
wcstoul
wcstoull
(C++11)
wcstoimax
wcstouimax
(C++11)
(C++11)
String manipulation
wcslen
wcscmp
wcscoll
wcsncmp
wcschr
wcsrchr
wcspbrk
wcsspn
wcscspn
wcsstr
wcstok
String examination
wcscpy
wcsncpy
wcsxfrm