Using raw string literals to avoid escaping characters
Strings may contain special characters, such as non-printable characters (newline, horizontal and vertical tab, and so on), string and character delimiters (double and single quotes), or arbitrary octal, hexadecimal, or Unicode values. These special characters are introduced with an escape sequence that starts with a backslash, followed by either the character (examples include
"), its designated letter (examples include
n for a new line,
t for a horizontal tab), or its value (examples include octal 050, hexadecimal XF7, or Unicode U16F0). As a result, the backslash character itself has to be escaped with another backslash character. This leads to more complicated literal strings that can be hard to read.
To avoid escaping characters, C++11 introduced raw string literals that do not process escape sequences. In this recipe, you will learn how to use the various forms of raw string literals.