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* Merge #68bors[bot]2018-09-119-28/+98
|\ | | | | | | | | | | | | | | 68: Implement incremental reparsing for remaining braced blocks r=matklad a=darksv Fixes #66 Co-authored-by: darksv <[email protected]>
| * Do not reparse token tree when it is not delimited by bracesdarksv2018-09-102-1/+6
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| * Implement reparsing for remaining blocksdarksv2018-09-109-28/+93
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* | store file rsovlerAleksey Kladov2018-09-107-116/+146
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* Merge #65bors[bot]2018-09-081-1/+1
|\ | | | | | | | | | | | | | | 65: simplify r=matklad a=matklad Co-authored-by: Aleksey Kladov <[email protected]>
| * simplifyAleksey Kladov2018-09-081-1/+1
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* | Fix yet another parser infinite loopAleksey Kladov2018-09-082-8/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit is an example of fixing a common parser error: infinite loop due to error recovery. This error typically happens when we parse a list of items and fail to parse a specific item at the current position. One choices is to skip a token and try to parse a list item at the next position. This is a good, but not universal, default. When parsing a list of arguments in a function call, you, for example, don't want to skip over `fn`, because it's most likely that it is a function declaration, and not a mistyped arg: ``` fn foo() { quux(1, 2 fn bar() { } ``` Another choice is to bail out of the loop immediately, but it isn't perfect either: sometimes skipping over garbage helps: ``` quux(1, foo:, 92) // should skip over `:`, b/c that's part of `foo::bar` ``` In general, parser tries to balance these two cases, though we don't have a definitive strategy yet. However, if the parser accidentally neither skips over a token, nor breaks out of the loop, then it becomes stuck in the loop infinitely (there's an internal counter to self-check this situation and panic though), and that's exactly what is demonstrated by the test. To fix such situation, first of all, add the test case to tests/data/parser/{err,fuzz-failures}. Then, run ``` RUST_BACKTRACE=short cargo test --package libsyntax2 ```` to verify that parser indeed panics, and to get an idea what grammar production is the culprit (look for `_list` functions!). In this case, I see ``` 10: libsyntax2::grammar::expressions::atom::match_arm_list at crates/libsyntax2/src/grammar/expressions/atom.rs:309 ``` and that's look like it might be a culprit. I verify it by adding `eprintln!("loopy {:?}", p.current());` and indeed I see that this is printed repeatedly. Diagnosing this a bit shows that the problem is that `pattern::pattern` function does not consume anything if the next token is `let`. That is a good default to make cases like ``` let let foo = 92; ``` where the user hasn't typed the pattern yet, to parse in a reasonable they correctly. For match arms, pretty much the single thing we expect is a pattern, so, for a fix, I introduce a special variant of pattern that does not do recovery.
* | Add fuzz failures dirAleksey Kladov2018-09-082-4/+213
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* move fuzz-invariants to the libraryAleksey Kladov2018-09-083-41/+44
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* Add trivial fuzzer for parserPascal Hertleif2018-09-083-0/+38
| | | | | | | | | | | | | As described in #61, fuzz testing some parts of this would be ~~fun~~ helpful. So, I started with the most trivial fuzzer I could think of: Put random stuff into File::parse and see what happens. To speed things up, I also did cp src/**/*.rs fuzz/corpus/parser/ in the `crates/libsyntax2/` directory (running the fuzzer once will generate the necessary directories).
* Don't overflow when limiting symbol searchAleksey Kladov2018-09-081-3/+2
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* Some abstraction around workersAleksey Kladov2018-09-085-74/+92
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* Deal with deadlocks in a more principaled wayAleksey Kladov2018-09-086-27/+39
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* fix deadlockAleksey Kladov2018-09-081-14/+18
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* Fix block structure in enumsAleksey Kladov2018-09-085-25/+274
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* simplifyAleksey Kladov2018-09-085-9/+14
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* Don't get stuck in tuple exprsAleksey Kladov2018-09-084-96/+484
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* Don't get stuck in macrosAleksey Kladov2018-09-083-1/+54
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* fix stuck parserAleksey Kladov2018-09-087-2/+719
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* fix labled expressionsAleksey Kladov2018-09-089-14/+313
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* nested mod completionAleksey Kladov2018-09-075-46/+68
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* Remove dyn dispatchAleksey Kladov2018-09-073-21/+65
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* Separete API from IMPLAleksey Kladov2018-09-071-14/+14
| | | | | | Looks like there's a rule of thumb: don't call API functions from an implementation! In this case, following this rule of thumb saves us an Arc-bump!
* Moved TokenSet into it's own file.Zac Winter2018-09-064-37/+41
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* better introduceAleksey Kladov2018-09-051-8/+26
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* introduce variableAleksey Kladov2018-09-056-10/+72
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* use correct workdir for the serverAleksey Kladov2018-09-052-10/+19
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* even less hacksAleksey Kladov2018-09-051-18/+16
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* less hacky pathsAleksey Kladov2018-09-051-12/+9
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* Merge #56bors[bot]2018-09-055-45/+137
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 56: Unify lookahead naming between parser and lexer. r=matklad a=zachlute Resolves Issue #26. I wanted to play around with libsyntax2, and fixing a random issue seemed like a good way to mess around in the code. This PR mostly does what's suggested in that issue. I elected to go with `at` and `at_str` instead of trying to do any fancy overloading shenanigans, because...uh, well, frankly I don't really know how to do any fancy overloading shenanigans. The only really questionable bit is `nth_is_p`, which could also have potentially been named `nth_at_p`, but `is` seemed more apropos. I also added simple tests for `Ptr` so I could be less terrified I broke something. Comments and criticisms very welcome. I'm still pretty new to Rust. Co-authored-by: Zach Lute <[email protected]>
| * Added tests for Ptr.Zach Lute2018-09-051-0/+78
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| * Updated Ptr methods to better match Parser method names.Zach Lute2018-09-055-45/+59
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* | fix tests on windowsAleksey Kladov2018-09-051-4/+11
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* switch to rayon threadpoolAleksey Kladov2018-09-043-8/+10
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* simplifyAleksey Kladov2018-09-041-5/+5
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* better extend selectionAleksey Kladov2018-09-041-24/+59
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* for types in boundsAleksey Kladov2018-09-0417-192/+311
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* dont change readonly filesAleksey Kladov2018-09-042-22/+34
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* micro-optimizeAleksey Kladov2018-09-041-2/+3
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* accidentally quadraticAleksey Kladov2018-09-041-16/+35
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* workAleksey Kladov2018-09-044-12/+15
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* extern blocksAleksey Kladov2018-09-038-8/+1032
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* switch to internal feedbackAleksey Kladov2018-09-036-79/+35
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* fix the testAleksey Kladov2018-09-031-2/+2
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* faster text lenAleksey Kladov2018-09-032-2/+2
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* index libraies off the main threadAleksey Kladov2018-09-035-13/+39
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* Index depsAleksey Kladov2018-09-037-78/+122
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* dispatch acros rootsAleksey Kladov2018-09-035-75/+180
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* completion for trait paramsAleksey Kladov2018-09-033-10/+33
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* Complete paramsAleksey Kladov2018-09-0310-237/+326
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