4759506bcf
This PR improves the consistency of error message formatting by rendering addenda of several existing error messages as labeled notes and hints.
82 lines
2.1 KiB
Text
82 lines
2.1 KiB
Text
universe u
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/--
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error: numerals are data in Lean, but the expected type is a proposition
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True : Prop
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-/
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#guard_msgs in
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#check (1 : True)
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/--
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error: numerals are data in Lean, but the expected type is universe polymorphic and may be a proposition
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α : Sort u
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-/
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#guard_msgs in
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def f (α : Sort u) : α :=
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1
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/--
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error: numerals are data in Lean, but the expected type is universe polymorphic and may be a proposition
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α : Sort u
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---
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info: fun {α} => id (id sorry) : {α : Sort u} → α
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-/
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#guard_msgs in
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#check fun {α : Sort u} => id (α := α) (id 0)
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/--
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error: numerals are data in Lean, but the expected type is a proposition
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∀ (n : Nat), True : Prop
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-/
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#guard_msgs in
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#check (1 : ∀ (n : Nat), True)
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/--
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error: failed to synthesize
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OfNat String 1
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numerals are polymorphic in Lean, but the numeral `1` cannot be used in a context where the expected type is
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String
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due to the absence of the instance above
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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#check (1 : String)
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/--
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error: failed to synthesize
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OfNat Bool 1
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numerals are polymorphic in Lean, but the numeral `1` cannot be used in a context where the expected type is
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Bool
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due to the absence of the instance above
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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#check (1 : Bool)
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/--
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error: failed to synthesize
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OfNat (Bool → Nat) 1
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numerals are polymorphic in Lean, but the numeral `1` cannot be used in a context where the expected type is
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Bool → Nat
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due to the absence of the instance above
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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#check (1 : Bool → Nat)
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/--
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error: failed to synthesize
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OfNat String 0
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numerals are polymorphic in Lean, but the numeral `0` cannot be used in a context where the expected type is
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String
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due to the absence of the instance above
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Hint: Additional diagnostic information may be available using the `set_option diagnostics true` command.
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-/
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#guard_msgs in
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def foo : String :=
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let x := 0
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x ++ x
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