this post was submitted on 09 May 2024
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Why is multiple levels of indentation bad?
IDK, but if the reason is "to break stuff into multiple functions", then I'm not necessarily writing yet another single-use function just to avoid writing a comment, especially in time critical applications. Did that with a text parser that could get text formatting from a specifically written XML file, but mainly due to it being way less time critical, and had a lot of reused code via templates.
It's important to remember that Linus is primarily writing about C code formatting. C doesn't have things that tend to create more deeply nested structures, such as a formal class syntax, or nested functions.
Going too deep is still bad--as zea notes, it's an indication of control structures run amok--but the exact number is dependent on the language and the context.
And you never include the switch-case-block indentation levels.