cce88c6190
After this commit, new interactice tactic classes can be added without
writing C++ code (see example: tests/lean/run/my_tac_class.lean).
The tactic_evaluator was simplified, and all the complexity has been
moved to tactic_notation, and lean code.
We can now inspect the intermediate states produced by the rewrite
tactic.
The function (@scope_trace _ line col thunk) can be used to position trace
messages produced by thunk. If line/col are not provided (i.e., we
just write (scope_trace thunk)), then line/col are filled with the
position of this term by the elaborator.
We can visualize the intermediate tactic states inside nested blocks
such as (try { ... })
The new infrastructure can be used to implement custom tactic_state
pretty printers.
10 lines
206 B
Text
10 lines
206 B
Text
crash.lean:6:11: error: don't know how to synthesize placeholder
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context:
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P : Prop
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⊢ Type ?
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crash.lean:9:17: error: invalid have-expression, expression
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H
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has type
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P
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but is expected to have type
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¬P
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