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fix: do not ban .. with a . on the next line #4768

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Sep 17, 2024
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fix: do not ban .. with a . on the next line #4768

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bb66d4d
fix: do not ban `..` with a `.` on the next line
eric-wieser Jul 17, 2024
e4f6939
fix the test
eric-wieser Aug 5, 2024
3d9bf22
Add test docstring
eric-wieser Aug 29, 2024
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2 changes: 1 addition & 1 deletion src/Lean/Parser/Term.lean
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Expand Up @@ -752,7 +752,7 @@ We use them to implement `macro_rules` and `elab_rules`
def namedArgument := leading_parser (withAnonymousAntiquot := false)
atomic ("(" >> ident >> " := ") >> withoutPosition termParser >> ")"
def ellipsis := leading_parser (withAnonymousAntiquot := false)
".." >> notFollowedBy "." "`.` immediately after `..`"
".." >> notFollowedBy (checkNoWsBefore >> ".") "`.` immediately after `..`"
def argument :=
checkWsBefore "expected space" >>
checkColGt "expected to be indented" >>
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10 changes: 10 additions & 0 deletions tests/lean/run/4768.lean
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@@ -0,0 +1,10 @@
/-!
Test that `..` tokens do not break nearby `.`s.

Note that this tests specifically for issues with `.` that are not present with `·`.
-/

example : True ∧ True := by
constructor
refine trivial ..
. trivial -- this has to be . not · for this test to be useful
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