author | wenzelm |
Fri, 21 Oct 2005 18:14:34 +0200 | |
changeset 17956 | 369e2af8ee45 |
parent 17476 | 315cb57e3dd7 |
child 18708 | 4b3dadb4fe33 |
permissions | -rw-r--r-- |
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(* Title: Pure/Isar/skip_proof.ML |
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ID: $Id$ |
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Author: Markus Wenzel, TU Muenchen |
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Skipping proofs -- quick_and_dirty mode. |
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*) |
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signature SKIP_PROOF = |
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sig |
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val make_thm: theory -> term -> thm |
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val cheat_tac: theory -> tactic |
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val prove: theory -> string list -> term list -> term -> (thm list -> tactic) -> thm |
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end; |
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structure SkipProof: SKIP_PROOF = |
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struct |
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(* oracle setup *) |
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exception SkipProof of term; |
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fun skip_proof (_, SkipProof prop) = |
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if ! quick_and_dirty then prop |
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else error "Proof may be skipped in quick_and_dirty mode only!"; |
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val _ = Context.add_setup [Theory.add_oracle ("skip_proof", skip_proof)]; |
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(* basic cheating *) |
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fun make_thm thy prop = |
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Thm.invoke_oracle_i thy "Pure.skip_proof" (thy, SkipProof prop); |
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fun cheat_tac thy st = |
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ALLGOALS (Tactic.rtac (make_thm thy (Var (("A", 0), propT)))) st; |
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fun prove thy xs asms prop tac = |
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Goal.prove thy xs asms prop |
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(if ! quick_and_dirty then (K (cheat_tac thy)) else tac); |
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end; |