How deeply does 100 C++ Mistakes and How to Avoid Them cover raw string literal?

Explains R"(... )" delimiters and contrasts raw and escaped backslash patterns through concrete code.

Raw string literal

As explained in 100 C++ Mistakes and How to Avoid Them

A raw string is a C++ string literal whose contents are written without interpreting ordinary escape sequences.

A raw string literal writes its contents without interpreting ordinary C++ escape sequences. It starts with R"( and ends with )", making regular-expression patterns easier to read when backslashes would otherwise become difficult to distinguish from C++ formatting. section 4.8

Compare escaped and raw patterns

To match two backslashes, an escaped string requires std::string pattern = "\\\\";, while the raw form is std::string pattern = R"(\\)";. The raw version shows the characters being matched more directly. In a regular expression, necessary escapes still matter: an escaped period means “match a period” rather than any single character. section 4.8

How 100 C++ Mistakes and How to Avoid Them covers it

Cover of 100 C++ Mistakes and How to Avoid Them

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Also explained in

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The Quick Python Book, Fourth EditionA raw string literal is a Python string literal in which backslashes are generally treated as literal characters rather than introducing escape sequences.
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Natural Language Processing in Action, Second EditionA Python string literal in which backslashes are preserved rather than normally interpreted as escape sequences.

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Related concepts

string literalkind of · A string literal is source-code notation that directly represents a string value.
stringkind of · A string is a programming-language value representing an ordered sequence of characters or character units as text.
regular expressionuses · A formal pattern notation that describes sets of strings and enables text to be matched, searched, extracted, or transformed.
escape sequencecontrasts with · An escape sequence is source notation, typically using an escape marker, that represents a character or control value or changes how characters are interpreted.
newlinecontrasts with · A newline is a character or character sequence that marks the boundary between consecutive lines of text.
f-stringcontrasts with · An f-string is a Python formatted string literal that evaluates embedded expressions and inserts their formatted values into the resulting string.

This explainer was generated by Manning's knowledge graph from the text of 100 C++ Mistakes and How to Avoid Them. The section links point to the parts of the book it draws on.