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* | Merge #69bors[bot]2018-09-154-198/+360
|\ \ | |/ |/| | | | | | | | | | | 69: Incremental reparsing for single tokens r=matklad a=darksv Implement incremental reparsing for `WHITESPACE`, `COMMENT`, `DOC_COMMENT`, `IDENT`, `STRING` and `RAW_STRING`. This allows to avoid reparsing whole blocks when a change was made only within these tokens. Co-authored-by: darksv <[email protected]>
| * independent tests for incremental reparsing of blocks and leavesdarksv2018-09-151-48/+68
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| * move reparsing testsdarksv2018-09-153-129/+140
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| * commit missing filedarksv2018-09-151-1/+1
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| * create separated mod for reparsing functionalitydarksv2018-09-153-170/+200
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| * correctly handle IDENTs when changed to contextual keywordsdarksv2018-09-141-1/+15
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| * create leaf directly without calling the parserdarksv2018-09-141-23/+2
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| * Incremental reparsing for single tokens (WHITESPACE, COMMENT, DOC_COMMENT, ↵darksv2018-09-132-14/+122
| | | | | | | | IDENT, STRING, RAW_STRING)
* | Merge #71bors[bot]2018-09-146-7/+176
|\ \ | |/ |/| | | | | | | | | | | 71: Support for unions r=matklad a=darksv Fixes #70 Co-authored-by: darksv <[email protected]>
| * adjust trailing newlinedarksv2018-09-142-2/+4
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| * add missing files with inline testsdarksv2018-09-142-0/+13
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| * Support for unionsdarksv2018-09-144-7/+161
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* don't get stuck in slice patternsAleksey Kladov2018-09-122-21/+122
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* correctly setup path-map for fs-changesAleksey Kladov2018-09-121-23/+24
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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]2018-09-082-7/+11
|\ | | | | | | | | | | | | | | 65: simplify r=matklad a=matklad Co-authored-by: Aleksey Kladov <[email protected]>
| * note about symbol searchAleksey Kladov2018-09-081-6/+10
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| * simplifyAleksey Kladov2018-09-081-1/+1
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* | Merge #64bors[bot]2018-09-084-12/+223
|\ \ | |/ |/| | | | | | | | | | | 64: Add fuzz test-case with a fix r=matklad a=matklad Co-authored-by: Aleksey Kladov <[email protected]>
| * 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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* Merge #63bors[bot]2018-09-083-0/+38
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 63: Add trivial fuzzer for parser r=matklad a=killercup 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). Co-authored-by: Pascal Hertleif <[email protected]>
| * 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!
* Merge #59bors[bot]2018-09-064-37/+41
|\ | | | | | | | | | | | | | | 59: Moved TokenSet into it's own file. r=matklad a=Plasticcaz As discussed in Issue #11, the only thing left in that issue that hasn't been fixed appears to be that TokenSet is not in it's own file. This pull request pulls TokenSet, it's macros and it's test into it's own file. Co-authored-by: Zac Winter <[email protected]>
| * 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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* Merge #58bors[bot]2018-09-051-18/+16
|\ | | | | | | | | | | | | | | 58: even less hacks r=matklad a=matklad Co-authored-by: Aleksey Kladov <[email protected]>
| * even less hacksAleksey Kladov2018-09-051-18/+16
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* Merge #57bors[bot]2018-09-051-12/+9
|\ | | | | | | | | | | | | | | 57: less hacky paths r=matklad a=matklad Co-authored-by: Aleksey Kladov <[email protected]>
| * 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]>
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