Defined in header <cwctype> | ||
|---|---|---|
std::wint_t towctrans( std::wint_t ch, std::wctrans_t desc ); |
Maps the wide character ch using the current C locale's LC_CTYPE mapping category identified by desc.
If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined.
| ch | - | the wide character to map |
| desc | - | the LC_CTYPE mapping, obtained from a call to std::wctrans |
The mapped value of ch using the mapping identified by desc in LC_CTYPE facet of the current C locale.
The following example demonstrates katakana to hiragana character mapping.
#include <algorithm>
#include <clocale>
#include <cwctype>
#include <iostream>
std::wstring tohira(std::wstring str)
{
std::transform(str.begin(), str.end(), str.begin(), [](wchar_t c)
{
return std::towctrans(c, std::wctrans("tojhira"));
});
return str;
}
int main()
{
std::setlocale(LC_ALL, "ja_JP.UTF-8");
std::wstring kana = L"ヒラガナ";
std::wcout << "katakana characters " << kana
<< " are " << tohira(kana) << " in hiragana\n";
}Output:
katakana characters ヒラガナ are ひらがな in hiragana
| looks up a character mapping category in the current C locale (function) |
|
C documentation for towctrans |
|
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