75 lines
3.6 KiB
Text
75 lines
3.6 KiB
Text
----------------------------------------------------------------------------------------------------
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-- Copyright (c) 2014 Microsoft Corporation. All rights reserved.
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-- Released under Apache 2.0 license as described in the file LICENSE.
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-- Author: Leonardo de Moura
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----------------------------------------------------------------------------------------------------
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import data.string data.num
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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' as automation
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-- that when execute produces a term.
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-- tactic.builtin is just a "dummy" for creating the
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-- definitions that are actually implemented in C++
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inductive tactic : Type :=
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builtin : tactic
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namespace tactic
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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' into a tactic that sythesizes a term
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opaque definition and_then (t1 t2 : tactic) : tactic := builtin
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opaque definition or_else (t1 t2 : tactic) : tactic := builtin
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opaque definition append (t1 t2 : tactic) : tactic := builtin
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opaque definition interleave (t1 t2 : tactic) : tactic := builtin
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opaque definition par (t1 t2 : tactic) : tactic := builtin
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opaque definition fixpoint (f : tactic → tactic) : tactic := builtin
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opaque definition repeat (t : tactic) : tactic := builtin
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opaque definition at_most (t : tactic) (k : num) : tactic := builtin
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opaque definition discard (t : tactic) (k : num) : tactic := builtin
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opaque definition focus_at (t : tactic) (i : num) : tactic := builtin
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opaque definition try_for (t : tactic) (ms : num) : tactic := builtin
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opaque definition now : tactic := builtin
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opaque definition assumption : tactic := builtin
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opaque definition eassumption : tactic := builtin
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opaque definition state : tactic := builtin
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opaque definition fail : tactic := builtin
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opaque definition id : tactic := builtin
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opaque definition beta : tactic := builtin
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opaque definition info : tactic := builtin
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opaque definition whnf : tactic := builtin
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opaque definition rotate_left (k : num) := builtin
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opaque definition rotate_right (k : num) := builtin
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definition rotate (k : num) := rotate_left k
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-- This is just a trick to embed expressions into tactics.
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-- The nested expressions are "raw". They tactic should
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-- elaborate them when it is executed.
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inductive expr : Type :=
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builtin : expr
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opaque definition apply (e : expr) : tactic := builtin
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opaque definition rapply (e : expr) : tactic := builtin
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opaque definition rename (a b : expr) : tactic := builtin
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opaque definition intro (e : expr) : tactic := builtin
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opaque definition generalize (e : expr) : tactic := builtin
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inductive expr_list : Type :=
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nil : expr_list,
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cons : expr → expr_list → expr_list
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opaque definition intro_list (es : expr_list) : tactic := builtin
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notation `intros` := intro_list expr_list.nil
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notation `intros` `(` l:(foldr `,` (h t, expr_list.cons h t) expr_list.nil) `)` := intro_list l
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opaque definition unfold (e : expr) : tactic := builtin
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opaque definition exact (e : expr) : tactic := builtin
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opaque definition trace (s : string) : tactic := builtin
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infixl `;`:15 := and_then
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notation `[` h:10 `|`:10 r:(foldl 10 `|` (e r, or_else r e) h) `]` := r
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definition try (t : tactic) : tactic := [t | id]
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definition repeat1 (t : tactic) : tactic := t ; repeat t
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definition focus (t : tactic) : tactic := focus_at t 0
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definition determ (t : tactic) : tactic := at_most t 1
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end tactic
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