lean4-htt/tests/lean/331.lean.expected.out
jrr6 5f4e6a86d5
feat: update and explain "unknown constant" and "failed to infer type" errors (#9423)
This PR updates the formatting of, and adds explanations for, "unknown
identifier" errors as well as "failed to infer type" errors for binders
and definitions.

It attempts to ameliorate some of the confusion encountered in #1592 by
modifying the wording of the "header is elaborated before body is
processed" note and adding further discussion and examples of this
behavior in the corresponding error explanation.
2025-07-18 19:20:31 +00:00

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331.lean:6:9-6:10: error(lean.inferBinderTypeFailed): Failed to infer type of binder `x`
Note: Because this declaration's type has been explicitly provided, all parameter types and holes (e.g., `_`) in its header are resolved before its body is processed; information from the declaration body cannot be used to infer what these values should be
331.lean:7:9-7:10: error(lean.inferBinderTypeFailed): Failed to infer type of binder `x`
Note: Because this declaration's type has been explicitly provided, all parameter types and holes (e.g., `_`) in its header are resolved before its body is processed; information from the declaration body cannot be used to infer what these values should be