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525e1919f7
I think the control flow in this function is complicated and confusing, largely due to the use of two booleans `print_formatted` and `fallback_to_println` that are set in multiple places and then used to guide proceedings. As well as hurting readability, this leads to at least one bug: if the `write_termcolor_buf` call fails and the pager also fails, the function will try to print color output to stdout, but that output will be empty because `write_termcolor_buf` failed. I.e. the `if fallback_to_println` body fails to check `print_formatted`. This commit rewrites the function to be neater and more Rust-y, e.g. by putting the result of `write_termcolor_buf` into an `Option` so it can only be used on success, and by using `?` more. It also changes terminology a little, using "pretty" to mean "formatted and colorized". The result is a little shorter, more readable, and less buggy. |
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| src | ||
| Cargo.toml | ||
| messages.ftl | ||
| README.md | ||
The driver crate is effectively the "main" function for the rust
compiler. It orchestrates the compilation process and "knits together"
the code from the other crates within rustc. This crate itself does
not contain any of the "main logic" of the compiler (though it does
have some code related to pretty printing or other minor compiler
options).
For more information about how the driver works, see the rustc dev guide.