lean4-htt/tests/lean/run/invalid_dotted_identifier_prop.lean
jrr6 7ed716f904
feat: improve projection and field-notation errors (#8986)
This PR improves the error messages produced by invalid projections and
field notation. It also adds a hint to the "function expected" error
message noting the argument to which the term is being applied, which
can be helpful for debugging spurious "function expected" messages
actually caused by syntax errors.

---------

Co-authored-by: Joachim Breitner <mail@joachim-breitner.de>
2025-06-26 18:36:47 +00:00

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Text

/--
error: Invalid dotted identifier notation: Not supported on type universe
Prop
-/
#guard_msgs in
def foo (n : Nat) : Nat :=
match n < 42 with
| .true => n
| .false => 47
set_option pp.mvars.anonymous false in
/--
error: Invalid dotted identifier notation: Not supported on type universe
Sort _
-/
#guard_msgs in
def foo2 (n : Nat) : Nat :=
match PUnit with
| .unit => n
def Prop.true := True
/--
error: Invalid dotted identifier notation: Not supported on type universe
Prop
-/
#guard_msgs in
#check (.true : Prop)