codecvt::always_noconv
测试转换是不需要完成。
bool always_noconv( ) const throw( );
返回值
true 是一个布尔值,如果转换无需完成;false 是至少一个必须执行。
备注
成员函数返回。do_always_noconv
示例
// codecvt_always_noconv.cpp
// compile with: /EHsc
#include <locale>
#include <iostream>
using namespace std;
int main( )
{
locale loc ( "German_Germany" );
bool result1 = use_facet<codecvt<char, char, mbstate_t> >
( loc ).always_noconv( );
if ( result1 )
cout << "No conversion is needed." << endl;
else
cout << "At least one conversion is required." << endl;
bool result2 = use_facet<codecvt<wchar_t, char, mbstate_t> >
( loc ).always_noconv( );
if ( result2 )
cout << "No conversion is needed." << endl;
else
cout << "At least one conversion is required." << endl;
}
要求
页眉: <区域设置>
命名空间: std