Difference between revisions of "cpp/locale/isalpha"
From cppreference.com
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===See also=== | ===See also=== | ||
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| − | {{dsc inc | cpp/string/byte/ | + | {{dsc inc | cpp/string/byte/dsc isalpha}} |
| − | {{dsc inc | cpp/string/wide/ | + | {{dsc inc | cpp/string/wide/dsc iswalpha}} |
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Revision as of 22:08, 31 May 2013
| Defined in header <locale>
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| template< class charT > bool isalpha( charT ch, const locale& loc ); |
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Checks if the given character classified as an alphabetic character by the given locale's std::ctype facet.
Contents |
Parameters
| ch | - | character |
| loc | - | locale |
Return value
Returns true if the character is classified as alphabetic, false otherwise.
Possible implementation
template< class charT > bool isalpha( charT ch, const std::locale& loc ) { return std::use_facet<std::ctype<charT>>(loc).is(std::ctype_base::alpha, ch); } |
Example
Demonstrates the use of isalpha() with different locales (OS-specific).
Run this code
#include <iostream> #include <locale> int main() { const wchar_t c = L'\u042f'; // cyrillic capital letter ya std::locale loc1("C"); std::cout << "isalpha('Я', C locale) returned " << std::boolalpha << std::isalpha(c, loc1) << '\n'; std::locale loc2("en_US.UTF8"); std::cout << "isalpha('Я', Unicode locale) returned " << std::boolalpha << std::isalpha(c, loc2) << '\n'; }
Output:
isalpha('Я', C locale) returned false
isalpha('Я', Unicode locale) returned trueSee also
| checks if a character is alphabetic (function) | |
| checks if a wide character is alphabetic (function) |
