Why Use Raw Strings in C 17?

What is a Raw String?

In C 17, raw strings are introduced as a convenient way to write strings containing characters that would otherwise require escaping. These strings are specifically useful in situations where such characters are part of the desired output.

How Do Raw Strings Work?

Raw strings are enclosed in parentheses, followed by double-quotation marks. For instance:

const char* s = R"delimiter"(This is a raw string.);

The enclosed text within the parentheses is treated as the literal string content, without any processing of escape characters. This allows characters such as quotation marks ("), backslashes (), and newlines to be included directly in the string.

Contrast with Regular Strings

In contrast to raw strings, regular strings require escape characters to represent certain special characters, as seen in the following code:

const char* regularString = "This is a regular string.\" Escaping quotes is required.";

By removing the need for escaping, raw strings simplify the process of working with complex string content and ensure that the intended output is preserved.

Usage of Raw Strings

Raw strings are particularly advantageous when dealing with HTML, JSON, or XML data, where special characters are common. They eliminate the need for cumbersome escaping and make the code cleaner and more readable. For example, the following raw string can represent HTML code without any issues:

const char* html = R"(<div class="container"><p>Hello, world!</p></div>)";

In conclusion, raw strings offer a straightforward method to incorporate special characters into C strings without the need for escape sequences. They provide a more natural way to handle text data, reducing errors and enhancing code readability.

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