The current help string ("space separated list") suggests that `--passes "pass1 pass2"` is expected; the orrect usage is `--passes pass1 --passes pass2`.
This adds the missing methods and turns `str::pattern` in a user facing module, as per RFC.
This also contains some big internal refactorings:
- string iterator pairs are implemented with a central macro to reduce redundancy
- Moved all tests from `coretest::str` into `collectionstest::str` and left a note to prevent the two sets of tests drifting apart further.
See https://github.com/rust-lang/rust/issues/22477
Hello!
I've been working towards a libsyntax without panics. See:
http://internals.rust-lang.org/t/changing-libsyntax-to-use-result-instead-of-panic/1670
This patch changes the internals of parser.rs to use Result<> rather than panicing. It keeps the following old-style panicing functions as a facade:
parse_expr, parse_item, parse_pat, parse_arm, parse_ty, parse_stmt
I left these functions because I wasn't sure what to do about the quote_* macros or how many syntax-extensions would break if these and quoting macros returned Result.
The gyst of the rest of the patch is:
- Functions in parse/parser.rs return PResult<> rather than panicing
- Other functions in libsyntax call panic! explicitly if they rely on panicing behaviour.
- I added a macro 'panictry!()' to act as scaffolding for callers while converting panicing functions. (This does the same as 'unwrap()' but is easier to grep for and turn into try!()).
Am I on the right track? I'd quite like to get something merged soon as keeping this rebased in the face of libsyntax changes is a lot of work. Please let me know what changes you'd like to see to make this happen.
Thanks!, Phil
If we find a blanket impl for `Trait` but we're matching on an object `Trait`, prefer the object (I think we could perhaps go either way, but this seems safer). Also give a nice error for attempts to manually `impl Trait for Trait`, since they will be ineffectual.
This fixes the problems around ambiguity ICEs relating to `Any` and `MarkerTrait` that were cropping up all over the place. There may still be similar ICEs reported in #21756 that this PR does not address.
Fixes#24015.
Fixes#24051.
Fixes#24037.
Fixes#23853.
Fixes#21942.
cc #21756.
cc @alexcrichton (this fixes crates.io)
r? @aturon
`Trait`, prefer the object. Also give a nice error for attempts to
manually `impl Trait for Trait`, since they will be ineffectual.
Fixes#24015.
Fixes#24051.
Fixes#24037.
Fixes#23853.
Fixes#21942.
cc #21756.
The current help string ("space separated list") suggests that
`--passes "pass1 pass2"` is expected; the correct usage is
`--passes pass1 --passes pass2`.
- Added missing reverse versions of methods
- Added [r]matches()
- Generated the string pattern iterators with a macro
- Added where bounds to the methods returning reverse iterators
for better error messages.
- Functions in parser.rs return PResult<> rather than panicing
- Other functions in libsyntax call panic! explicitly for now if they rely on panicing behaviour.
- 'panictry!' macro added as scaffolding while converting panicing functions.
(This does the same as 'unwrap()' but is easier to grep for and turn into try!())
- Leaves panicing wrappers for the following functions so that the
quote_* macros behave the same:
- parse_expr, parse_item, parse_pat, parse_arm, parse_ty, parse_stmt
I ran across a comma splice.
I didn't set the "note:" off inside parenthesis. I looked around in other places and saw it both ways, but without surrounding parenthesis seemed to be the more common convention followed elsewhere in the docs. Let me know if you have an overriding preference about that and I'll change it.
r? @steveklabnik
This syncs the _Crates and Modules_ chapter of the book with current output:
* the runs are supposed to be in the project’s directory,
* `rustc` has slightly different error messages (and things like macro line:col numbers),
* Cargo now compiles things into `target/debug`.
Will
bors
Niko Matsakis
Corey Farwell
Remi Rampin
Guillaume Gomez
Marvin Löbel
Phil Dawes
Mark Mossberg
mdinger
Dzmitry Malyshau
Dave Huseby
github-monoculture
Andrew Paseltiner
Earl St Sauver
Manish Goregaokar