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"non-greedy" repetition are not supported in regular expressions #209

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BookOwl opened this issue Mar 29, 2017 · 1 comment · May be fixed by #439
Open

"non-greedy" repetition are not supported in regular expressions #209

BookOwl opened this issue Mar 29, 2017 · 1 comment · May be fixed by #439
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@BookOwl
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BookOwl commented Mar 29, 2017

Why aren't they?
@nikomatsakis
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@BookOwl good question! I'm not sure what it would take to make them work. Particularly now that we use the regex engine to generate our code, it probably doesn't take much. We generate the NFA/DFA primarily to check for the potential of overlap, and I guess "greedy or not" doesn't really factor in there.

@liaden liaden linked a pull request Jan 17, 2019 that will close this issue
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Disable non-greedy restriction on regexes liaden/lalrpop
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@nikomatsakis @BookOwl