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authorbors[bot] <26634292+bors[bot]@users.noreply.github.com>2019-11-09 09:13:14 +0000
committerGitHub <noreply@github.com>2019-11-09 09:13:14 +0000
commit561bb979cecd786f5d311ea7bddb1e15d77a3848 (patch)
treea6aaa81c3acbfc5e6add5ebbee9abbc0f8357014 /crates/ra_syntax/test_data/parser/ok/0031_extern.rs
parent23939cabcc10ecc045a97361df182b9b4db32953 (diff)
parent0a5ec69404a2556dd82e5bb00b295aebaa291f04 (diff)
Merge #2169
2169: MBE: Mapping spans for goto definition r=matklad a=edwin0cheng Currently, go to definition gives the wrong span in MBE. This PR implement a mapping mechanism to fix it and it could be used for future MBE hygiene implementation. The basic idea of the mapping is: 1. When expanding the macro, generated 2 `TokenMap` which maps the macro args and macro defs between tokens and input text-ranges. 2. Before converting generated `TokenTree` to `SyntaxNode`, generated a `ExpandedRangeMap` which is a mapping between token and output text-ranges. 3. Using these 3 mappings to construct an `ExpansionInfo` which can map between input text ranges and output text ranges. Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
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