Preparation for #865, which proposes adding a flag which outputs which
config options are used during formatting.
This PR should not make any difference to functionality. A lot of this
was search-and-replace.
Some areas worthy of review/discussion:
- The method for each config item returns a clone of the underlying
value. We can't simply return an immutable reference, as lots of
places in the code expect to be able to pass the returned value as
`bool` (not `&bool). It would be nice if the `bool` items could
return a copy, but the more complex types a borrowed reference... but
unfortunately, I couldn't get the macro to do this.
- A few places (mostly tests and `src/bin/rustfmt.rs`) were overriding
config items by modifying the fields of the `Config` struct directly.
They now use the existing `override_value()` method, which has been
modified to return a `Result` for use by `src/bin/rustfmt.rs`. This
benefits of this are that the complex `file_lines` and `write_mode`
strings are now parsed in one place (`Config.override_value`) instead
of multiple. The disadvantages are that it moves the compile-time
checks for config names to become run-time checks.
We will no longer break in the middle of words, only at whitespace or punctuation.
This means we sometimes over-run, but that seems better than some of the bad splits we see.
Closes#369
Create test.rs
Delete test.rs
Fixed compile error.
Trying a possible fix on an arithmetic overflow
another try at the test failure...
passed all tests.
Added tests and cleaned up logic as per nrc's critiques
Delete string.rs.old
Delete string.rs.bk
Made changes as per nrc's requests.
Update string_punctuation.rs
Update string_punctuation.rs
fixed logical redundancy
