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2c00a5a8 XL |
1 | # Crates |
2 | ||
3 | A crate is a compilation unit in Rust. Whenever `rustc some_file.rs` is called, | |
4 | `some_file.rs` is treated as the *crate file*. If `some_file.rs` has `mod` | |
5 | declarations in it, then the contents of the module files would be inserted in | |
6 | places where `mod` declarations in the crate file are found, *before* running | |
7 | the compiler over it. In other words, modules do *not* get compiled | |
8 | individually, only crates get compiled. | |
9 | ||
10 | A crate can be compiled into a binary or into a library. By default, `rustc` | |
11 | will produce a binary from a crate. This behavior can be overridden by passing | |
60c5eb7d | 12 | the `--crate-type` flag to `lib`. |