带有utf16字符的json字符串无法从“const char[566]”转换为“std::basic_string”
我有一个json,它需要测试一个包含utf16宽字符的字符串,但我得到以下错误消息:带有utf16字符的json字符串无法从“const char[566]”转换为“std::basic_string”,json,utf-16,c++98,Json,Utf 16,C++98,我有一个json,它需要测试一个包含utf16宽字符的字符串,但我得到以下错误消息: \..\test\TestClass.cpp(617): error C2440: 'initializing' : cannot convert from 'const char [566]' to 'std::basic_string<_Elem,_Traits,_Ax>' with 2> [ 2> _Elem=wchar_t
\..\test\TestClass.cpp(617): error C2440: 'initializing' : cannot convert from 'const char [566]' to 'std::basic_string<_Elem,_Traits,_Ax>'
with
2> [
2> _Elem=wchar_t,
2> _Traits=std::char_traits<wchar_t>,
2> _Ax=std::allocator<wchar_t>
2> ]
2> No constructor could take the source type, or constructor overload resolution was ambiguous
我以为我的json中包含了std::wstring。你知道怎么回事吗?您可以在\u9ce5中看到我的utf16字符。这是这次测试的关键
我看了这一点,但没有看到他们在关于UDT的决议中提到了什么
我在前面看到了这个,但是对于转义的c字符串,我不确定将L放在哪里。std::wstring不能从类似于我的字符串的字符串初始化,因此编译错误
您可以从a初始化std::wstring-其语法包括开头引号前的L前缀,例如Lmy字符串
在使用字符串文字连接时,需要在所有字符串文字前面加上L,即:
伟大的谢谢当我对json执行wcout时,没有:L\\\u9CE5\},\n,它不会显示日文字符。它正在显示\u9CE5。这不对吗?当我添加L…:L\\\u9ce5,此处附近的json无效。有什么想法吗?我把L放在你说的所有行之前。你看到我的评论了吗?当我用json做一个wcout时,没有:L\\\u9CE5\},\n,它没有显示日文字符。它正在显示\u9CE5。不对吗不,这是正确的:符号在JSON中被编码为Unicode序列,但它仍然表示汉字“bird”,任何理智的JSON解析器都会这样解释它。
static std::wstring& BAD_JSON5_missingComma_multipleNewlines_Utf16MixedDosAndUnixLineEndings()
{
static std::wstring j =
"{\n" <=VS squigly says error on this line
"\"header\":{\n"
"\"version\":{\"major\":1,\"minor\":0,\"build\":0}\n"
"},\n"
"\"body\":{\n"
"\"string\":{\"type\":\"OurWideStringClass\",\"value\":\"foo\"},\n\n\n\n"
"\"int\":[\n"
"{\"type\":\"string\",\"value\":\"\\u9CE5\"},\n"
"{\"type\":\"Int\",\"value\":5678}\n"
"],\n"
"\"double\":{\"type\":\"Double\",\"value\":12.34},\n"
"\"path1\":[\n"
"{\n"
"\"string\":{\"type\":\"OurWideStringClass\",\"value\":\"bar\"},\r\n"
"\"int\":[\n"
"{\"type\":\"Int\"\"value\":7},\n"
"{\"type\":\"Int\",\"value\":11}\n"
"]\n"
"},\n"
"{\n"
"\"string\":{\"type\":\"OurWideStringClass\",\"value\":\"top\"},\n"
"\"int\":[\n"
"{\"type\":\"Int\",\"value\":13},\r\n"
"{\"type\":\"Int\",\"value\":41}\n"
"]\n"
"}\n"
"],\n"
"\"path2\":{\n"
"\"int\":{\"type\":\"Int\",\"value\":-1234},\n"
"\"double\":{\"type\":\"Double\",\"value\":-1.234}\r\n"
"}\n"
"}\n"
"}\n"; <=double clicking build error goes to this line
return j;
}
OurWideStringClass slxStJson5 = BAD_JSON5_missingComma_multipleNewlines_Utf16MixedDosAndUnixLineEndings();
std::wistringstream ssJsonMissingCommaUtf16Newlines(slxStJson5);
static std::wstring j =
L"{\n"
L"\"header\":{\n"
L"\"version\":{\"major\":1,\"minor\":0,\"build\":0}\n"
L"},\n"
...