f02768b685
Cleanup rustc/driver - improve/remove allocations - simplify `profile::trace::cons*` - don't sort `base` if it only has one element - use `Cow<str>` where applicable - use `unwrap_or_else` with function calls - remove an explicit `return`, add an explicit `None` - remove lifetimes from `const`s - improve common patterns - improve macro calls - whitespace & formatting fixes
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 guide.