November 2017
Intermediate to advanced
264 pages
5h 45m
English
Content preview from Rust Essentials - Second Edition
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Attributes
In the compiler, you may have already seen examples of warnings between #[ ... ] signs, like #[warn(unused_variables)]. These are attributes which represent metadata information about the code. You can use these yourself in code, and they are placed right before an item (such as a function) on which they have something to say. They can, for example, disable certain classes of warnings, turn on certain compiler features, or mark functions as being part of unit tests or benchmark code.
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