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std::iswalnum

De cppreference.com
< cpp‎ | string‎ | wide

 
 
Bibliothèque de chaînes de caractères
Chaînes à zéro terminal
Original:
Null-terminated strings
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Les chaînes d'octets
Chaines multi-octets
Les chaînes étendues
Classes
Original:
Classes
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basic_string
char_traits
 
Chaînes à zéro terminal de large
Fonctions
Original:
Functions
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Manipulation caractère
Original:
Character manipulation
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Conversion aux formats numériques
Original:
Conversions to numeric formats
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La manipulation de chaînes
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String manipulation
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La manipulation des tableaux
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Array manipulation
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wmemcpy
wmemmove
wmemcmp
wmemchr
wmemset
 
Déclaré dans l'en-tête <cwctype>
int iswalnum(std::wint_t ch );
Vérifie si le caractère large est un caractère alphanumérique, c'est à dire soit un nombre (0123456789), une lettre majuscule (ABCDEFGHIJKLMNOPQRSTUVWXYZ), une lettre minuscule (abcdefghijklmnopqrstuvwxyz) ou n'importe quel caractère alphanumérique spécifique à la localisation en cours .
Original:
Checks if the given wide character is an alphanumeric character, i.e. either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphanumeric character specific to the current locale.
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Sommaire

[modifier]Paramètres

ch -
caractère large
Original:
wide character
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[modifier]Retourne la valeur

Valeur non nulle (true) si le caractère large est un caractère alphanumérique, 0 (false) autrement .
Original:
Non-zero value (true) if the wide character is a alphanumeric character, 0 (false) otherwise.
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[modifier]Exemple

#include <iostream>#include <cwctype>#include <clocale>   int main(){wchar_t c = L'\u13ad';// the Cherokee letter HA ('Ꭽ')   std::cout<<std::hex<<std::showbase<<std::boolalpha;std::cout<<"in the default locale, iswalnum("<<(std::wint_t)c <<") = "<<(bool)std::iswalnum(c)<<'\n';std::setlocale(LC_ALL, "en_US.utf8");std::cout<<"in Unicode locale, iswalnum("<<(std::wint_t)c <<") = "<<(bool)std::iswalnum(c)<<'\n';}

Résultat :

in the default locale, iswalnum(0x13ad) = false in Unicode locale, iswalnum(0x13ad) = true

[modifier]Voir aussi

vérifie si un caractère alphanumérique est classé comme par un paramètre régional
Original:
checks if a character is classified as alphanumeric by a locale
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(fonction générique)[edit]
vérifie si un caractère est alphanumérique
Original:
checks if a character is alphanumeric
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(fonction)[edit]
C documentation for iswalnum
ASCII values
(hex)
characters

iscntrl
iswcntrl

isprint
iswprint

isspace
iswspace

isblank
iswblank

isgraph
iswgraph

ispunct
iswpunct

isalnum
iswalnum

isalpha
iswalpha

isupper
iswupper

islower
iswlower

isdigit
iswdigit

isxdigit
iswxdigit

0 - 8 0x00-0x08 control codes (NUL, etc.) ≠000000000000
9 0x09 tab (\t) ≠00≠0≠000000000
10 - 13 0x0A-0x0D whitespaces (\n,\v,\f,\r) ≠00≠0000000000
14 - 31 0x0E-0x1F control codes ≠000000000000
32 0x20 space 0≠0≠0≠000000000
33 - 47 0x21-0x2F!"#$%&'()*+,-./0≠000≠0≠0000000
48 - 57 0x30-0x3901234567890≠000≠00≠0000≠0≠0
58 - 64 0x3a-0x40:;<=>?@0≠000≠0≠0000000
65 - 70 0x41-0x46ABCDEF0≠000≠00≠0≠0≠000≠0
71 - 90 0x47-0x5AGHIJKLMNOPQRSTUVWXYZ0≠000≠00≠0≠0≠0000
91 - 96 0x5B-0x60[\]^_`0≠000≠0≠0000000
97 -102 0x61-0x66abcdef0≠000≠00≠0≠00≠00≠0
103-122 0x67-0x7Aghijklmnopqrstuvwxyz0≠000≠00≠0≠00≠000
123-126 0x7B-0x7E{|}~0≠000≠0≠0000000
127 0x7F backspace character (DEL) ≠000000000000
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