¿Puede std::string contener Unicode?

Can std::string hold Unicode?

You can store unicode strings fine into std::string using the utf-8 encoding too.

In Microsoft Word you can insert Unicode characters by typing the hex value of the character then typing Alt-x. You can also see the Unicode value of a character by placing the cursor immediately after the character and pressing Alt-x.

C++ provides a wide-character type, wchar_t , which can store Unicode strings. The exact implementation of wchar_t is implementation defined, but it is often UTF-32. Now, you can write these wide-character strings to a wide-character …

std::string and std::wstring . The in-memory representation ( std::string or std::wstring ) is independent of the on-disk representation (UTF-8, UTF-16 or UTF-32), so prepare yourself for having to convert at the boundary (reading and writing).

2 Answers. std::string per se uses no encoding — it will return the bytes you put in it.

Inserting Unicode Characters

1. Type the character code where you want to insert the Unicode symbol.
2. Press ALT+X to convert the code to the symbol. If you’re placing your Unicode character immediately after another character, select just the code before pressing ALT+X.

Depends on the version of C++ you are using. C++0x (not entirely released yet but still supported on many compilers) adds native UTF-8 support to the language. Otherwise, no the language does not support UTF-8. C++03 and earlier support unicode through the use of Wide Characters (wchar_t).

String Literals in C++ C++ supports several types of string literals: “hello” — represents the string “hello” L”hello” — represents the wide string “hello” u8″hello” — represents the string “hello”, encoded in UTF-8.

The answer is based on the particular encoding used for the Unicode text. If UTF-8 encoding is used, because it’s based on 8-bit code units, a simple char can be used to represent each of these code units in C++. In this case the STL std::string class, which is char-based, is a good option to store UTF-8-encoded Unicode text.

The Windows API seems big on UNICODE, you make a new project in Visual C++ and it sets it to UNICODE by default. And me trying to be a good Windows programmer, I want to use UNICODE. The problem is the C++ Standard Library and STL (such as std::string, or std::runtime_error) don’t work well with UNICODE strings.

Strings in STL support both ASCII as well as Unicode (wide-character) format. STL supports two types of strings: #1) string: This is the ASCII format string and to include this type of string objects in the program we need to include string.h file in our program.

The most accurate solution would be to use a Unicode library, such as ICU, to calculate the Unicode properties that you are after. Finally, UTF strings in human languages that don’t use combining characters usually do pretty well with find / regex. I’m not sure about Chinese, but English is one of them.