29 lines
1.3 KiB
Text
29 lines
1.3 KiB
Text
import logic
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namespace tactic
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-- This is just a trick to embed the 'tactic language' as a
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-- Lean expression. We should view (tactic A) as automation
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-- that when execute produces a term of type A.
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-- tactic_value is just a "dummy" for creating the "fake"
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inductive tactic (A : Type) : Type :=
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| tactic_value {} : tactic A
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-- Remark the following names are not arbitrary, the tactic module
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-- uses them when converting Lean expressions into actual tactic objects.
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-- The bultin 'by' construct triggers the process of converting a
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-- a term of type (tactic A) into a tactic that sythesizes a term
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-- of type A
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definition then_tac {A : Type} (t1 t2 : tactic A) : tactic A := tactic_value
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definition orelse_tac {A : Type} (t1 t2 : tactic A) : tactic A := tactic_value
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definition repeat_tac {A : Type} (t : tactic A) : tactic A := tactic_value
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definition now {A : Type} : tactic A := tactic_value
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definition state {A : Type} : tactic A := tactic_value
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definition fail {A : Type} : tactic A := tactic_value
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definition id {A : Type} : tactic A := tactic_value
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definition beta {A : Type} : tactic A := tactic_value
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definition apply {A : Type} {B : Type} (b : B) : tactic A := tactic_value
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infixl `;`:200 := then_tac
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infixl `|`:100 := orelse_tac
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notation `!`:max t:max := repeat_tac t
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end
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