std::wcscoll
From cppreference.com
Defined in header <cwchar>
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int wcscoll(
const
wchar_t
* lhs, const
wchar_t
* rhs )
;
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Compares two null-terminated wide strings according to the locale most recently installed by std::setlocale, as defined by the LC_COLLATE
Parameters
| lhs, rhs | - | pointers to the null-terminated wide strings to compare |
Return value
Negative value if lhs is less than (precedes) rhs.
0 if lhs is equal to rhs
Positive value if lhs is greater than (follows) rhs.
Notes
Collation order is the dictionary order: the position of the letter in the national alphabet (its equivalence class collation units. For example, "ch" in Czech follows "h" and precedes "i", and "dzs" in Hungarian follows "dz" and precedes "g"
Example
Run this code
#include <clocale> #include <iostream> void try_compare(const wchar_t* p1, const wchar_t* p2) { if (std::wcscoll(p1, p2) < 0) std::wcout << p1 << " before " << p2 << '\n'; else std::wcout << p2 << " before " << p1 << '\n'; } int main() { std::setlocale(LC_ALL, "en_US.utf8"); std::wcout << "In the American locale: "; try_compare(L"hrnec", L"chrt"); std::setlocale(LC_COLLATE, "cs_CZ.utf8"); std::wcout << "In the Czech locale: "; try_compare(L"hrnec", L"chrt"); std::setlocale(LC_COLLATE, "en_US.utf8"); std::wcout << "In the American locale: "; try_compare(L"år", L"ängel"); std::setlocale(LC_COLLATE, "sv_SE.utf8"); std::wcout << "In the Swedish locale: "; try_compare(L"år", L"ängel"); }
Output:
In the American locale: chrt before hrnec In the Czech locale: hrnec before chrt In the American locale: ängel before år In the Swedish locale: år before ängel
See also
| compares two strings in accordance to the current locale (function) |
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[virtual]
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compares two strings using this facet's collation rules (virtual protected member function of std::collate<CharT>) |
transform a wide string so that wcscmp would produce the same result as wcscoll (function) |
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C documentation for wcscoll
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