<string> typedefs

The <string> header provides the following typedefs:

string

A type that describes a specialization of the class template basic_string with elements of type char.

Other typedefs that specialize basic_string include wstring, u16string, and u32string.

typedef basic_string<char, char_traits<char>, allocator<char>> string;

Remarks

The following are equivalent declarations:

string str("");

basic_string<char> str("");

For a list of string constructors, see basic_string::basic_string.

u16string

A type that describes a specialization of the class template basic_string with elements of type char16_t.

Other typedefs that specialize basic_string include wstring, string, and u32string.

typedef basic_string<char16_t, char_traits<char16_t>, allocator<char16_t>> u16string;

Remarks

For a list of string constructors, see basic_string::basic_string.

u32string

A type that describes a specialization of the class template basic_string with elements of type char32_t.

Other typedefs that specialize basic_string include string, u16string, and wstring.

typedef basic_string<char32_t, char_traits<char32_t>, allocator<char32_t>> u32string;

Remarks

For a list of string constructors, see basic_string::basic_string.

wstring

A type that describes a specialization of the class template basic_string with elements of type wchar_t.

Other typedefs that specialize basic_string include string, u16string, and u32string.

typedef basic_string<wchar_t, char_traits<wchar_t>, allocator<wchar_t>> wstring;

Remarks

The following are equivalent declarations:

wstring wstr(L"");

basic_string<wchar_t> wstr(L"");

For a list of string constructors, see basic_string::basic_string.

Note

The size of wchar_t is implementation-defined. If your code depends on wchar_t to be a certain size, check your platform's implementation (for example, with sizeof(wchar_t)). If you need a string character type with a width that is guaranteed to remain the same on all platforms, use string, u16string, or u32string.

See also

<string>