2652cc18b8
This PR standardizes error messages by quoting names with backticks. The changes were automated, so some cases may still be missing.
87 lines
1.8 KiB
Text
87 lines
1.8 KiB
Text
/-!
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# Localized error messages with unassigned metavariables
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-/
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set_option pp.mvars false
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/-!
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Test: now reports "don't know how to synthesize implicit argument" rather than an error on the `example` command.
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-/
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/--
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error: don't know how to synthesize implicit argument `α`
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@none ?_
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context:
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⊢ Type _
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---
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error: failed to infer `let` declaration type
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-/
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#guard_msgs in
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example : IO Unit := do
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let x := none
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pure ()
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/-!
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Test: now reports that the universe levels are not assigned at the 'let' rather than an error on the `example` command.
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-/
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/--
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error: failed to infer universe levels in `let` declaration type
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PUnit.{_}
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-/
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#guard_msgs in
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def foo : IO Unit := do
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let x : PUnit := PUnit.unit
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pure ()
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-- specializes to 0 on error
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/--
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info: def foo : IO Unit :=
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have x := PUnit.unit.{0};
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pure.{0, 0} Unit.unit
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-/
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#guard_msgs in set_option pp.universes true in #print foo
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/-!
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Test: Works for `have` too.
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-/
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/--
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error: failed to infer universe levels in `have` declaration type
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PUnit.{_}
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-/
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#guard_msgs in
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def foo' : IO Unit := do
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have x : PUnit := PUnit.unit
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pure ()
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/-!
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Test: Works for `fun` binders.
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-/
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/--
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error: Failed to infer universe levels in type of binder `x`
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PUnit.{_}
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-/
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#guard_msgs in
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example : Nat := (fun x : PUnit => 2) PUnit.unit
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/-!
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Test: A failure not in a binder, right now reports an error on `example`.
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A change is that before the error was about level parameters rather than metavariables since
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the def elaborator would turn all metavariables into parameters before this analysis.
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-/
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/--
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error: declaration `_example` contains universe level metavariables at the expression
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Function.const ({α : Sort _} → α → α) 2 @id.{_}
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in the declaration body
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Function.const ({α : Sort _} → α → α) 2 @id.{_}
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-/
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#guard_msgs in
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example : Nat := Function.const _ 2 @id
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