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std::wstring_convert::converted

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Locales und Facetten
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Locales and facets
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locale
Buchstaben-Klassifikation
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Character classification
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Conversions
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Locale-specific facets
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Code-Konvertierung Facetten
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codecvt_utf8(C++11)
codecvt_utf16(C++11)
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C locale
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std::wstring_convert
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wstring_convert::wstring_convert
wstring_convert::~wstring_convert
wstring_convert::from_bytes
wstring_convert::to_bytes
wstring_convert::converted
wstring_convert::state
 
Defined in header <locale>
std::size_t converted() const;

Returns the number of source characters that were processed by the most recent from_bytes() or to_bytes().

[Bearbeiten] Rückgabewert

The number of characters consumed by the most recent conversion operation.

[Bearbeiten] Beispiel

#include <iostream>
#include <string>
#include <locale>
#include <codecvt>
int main()
{
    std::string utf8 =  u8"z\u00df\u6c34\U0001d10b"; // or u8"zß水𝄋"
                        // or "\x7a\xc3\x9f\xe6\xb0\xb4\xf0\x9d\x84\x8b";
    std::cout << "original UTF-8 string size: " << utf8.size() << '\n';
 
    // the UTF-8 - UTF-32 standard conversion facet
    std::wstring_convert<std::codecvt_utf8<char32_t>, char32_t> cvt;
 
    // UTF-8 to UTF-32
    std::u32string utf32 = cvt.from_bytes(utf8);
    std::cout << "UTF-32 string size: " << utf32.size() << '\n';
    std::cout << "converted() == " << cvt.converted() << '\n';
    // UTF-32 to UTF-8
    utf8 = cvt.to_bytes(utf32);
    std::cout << "new UTF-8 string size: " << utf8.size() << '\n';
    std::cout << "converted() == " << cvt.converted() << '\n';
}

Output:

original UTF-8 string size: 10
UTF-32 string size: 4
converted() == 10
new UTF-8 string size: 10
converted() == 4

[Bearbeiten] Siehe auch

wandelt eine breite Folge in ein Byte String
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converts a wide string into a byte string
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(öffentliche Elementfunktion) [edit]
wandelt ein Byte-String in einem breiten String
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converts a byte string into a wide string
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(öffentliche Elementfunktion) [edit]