It ignores error only if `p` does not consume any input. This change improves the quality of the error messages. The previous behavior can be obtained by using `optional (try p)`. |
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| .. | ||
| control | ||
| data | ||
| lean | ||
| coe.lean | ||
| core.lean | ||
| default.lean | ||
| fix.lean | ||
| init.md | ||
| io.lean | ||
| platform.lean | ||
| util.lean | ||
| wf.lean | ||