54f7bf9391
Summary: We minimize the number of "'sorry' used warning messages". We also re-target the error to the main declaration. Example: foo._main ==> foo We do not report for auxiliary declarations such as "_example" and "foo.equations._eqn_1" Get rid of the redundant error message "error : failed" for tactics. We added "silent failures" in the tactic framework. We do not store line/col information for tactics nested in notation declarations. Before this commit, we would have tactics such as (tactic.save_info line col) nested inside of notation declarations.
57 lines
1.8 KiB
Text
57 lines
1.8 KiB
Text
/-
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Copyright (c) 2017 Gabriel Ebner. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Gabriel Ebner
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-/
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prelude
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import init.meta.tactic
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import init.meta.interactive
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namespace tactic
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private meta def report {α} (s : tactic_state) : option (unit → format) → α
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| (some fmt) := undefined_core $ to_string $ fmt () ++ format.line ++ to_fmt s
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| none := undefined_core "silent failure"
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private meta def run_or_fail {α} (s : tactic_state) (tac : tactic α) : α :=
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match tac s with
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| (tactic_result.success a s) := a
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| (tactic_result.exception fmt _ s') := report s' fmt
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end
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meta def run_async {α : Type} (tac : tactic α) : tactic (task α) := do
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s ← read, return $ task.delay $ λ _,
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match tac s with
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| (tactic_result.success a s) := a
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| (tactic_result.exception fmt _ s') := report s' fmt
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end
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meta def prove_goal_async (tac : tactic unit) : tactic unit := do
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ctx ← local_context, revert_lst ctx,
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tgt ← target, tgt ← instantiate_mvars tgt,
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env ← get_env, tgt ← return $ env^.unfold_untrusted_macros tgt,
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when tgt^.has_meta_var (fail "goal contains metavariables"),
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params ← return tgt^.collect_univ_params,
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lemma_name ← new_aux_decl_name,
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proof ← run_async (do
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goal_meta ← mk_meta_var tgt,
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set_goals [goal_meta],
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monad.for' ctx (λc, intro c^.local_pp_name),
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tac,
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proof ← instantiate_mvars goal_meta,
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proof ← return $ env^.unfold_untrusted_macros proof,
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when proof^.has_meta_var $ fail "async proof failed: contains metavariables",
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return proof),
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add_decl $ declaration.thm lemma_name params tgt proof,
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exact (expr.const lemma_name (params^.for level.param))
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namespace interactive
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open interactive.types
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/-- Proves the first goal asynchronously as a separate lemma. -/
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meta def async (tac : irtactic) : tactic unit :=
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prove_goal_async tac
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end interactive
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end tactic
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