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feat(frontends/lean): add beta-reduction tactic command

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2014-06-29 19:41:54 -07:00
parent e1d807a077
commit 33cb9382aa
2 changed files with 6 additions and 0 deletions
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2
src/frontends/lean/builtin_tactic_cmds.cpp
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@ -12,6 +12,7 @@ static name g_bang("!");
tactic parse_fail_tactic(parser &, pos_info const &) { return fail_tactic(); }
tactic parse_id_tactic(parser &, pos_info const &) { return id_tactic(); }
tactic parse_now_tactic(parser &, pos_info const &) { return now_tactic(); }
tactic parse_beta_tactic(parser &, pos_info const &) { return beta_tactic(); }
tactic parse_print_tactic(parser & p, pos_info const & pos) {
return trace_state_tactic(p.get_stream_name(), pos);
}
@ -54,6 +55,7 @@ tactic_cmd_table get_builtin_tactic_cmds() {
add_tactic(t, tactic_cmd_info("echo", "trace tactic: display message", parse_echo_tactic));
add_tactic(t, tactic_cmd_info("unfold", "unfold definition", parse_unfold_tactic));
add_tactic(t, tactic_cmd_info("repeat", "repeat tactic", parse_repeat_tactic));
add_tactic(t, tactic_cmd_info("beta", "beta-reduction tactic", parse_beta_tactic));
add_tactic(t, tactic_cmd_info("apply", "apply tactic", parse_apply_tactic));
add_tactic(t, tactic_cmd_info("!", "repeat tactic", parse_repeat_tactic));
add_tactic(t, tactic_cmd_info("id", "do nothing tactic", parse_id_tactic));

4
tests/lean/run/tactic9.lean Normal file
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@ -0,0 +1,4 @@
import logic
theorem tst {A B : Bool} (H1 : A) (H2 : B) : ((fun x : Bool, x) A) ∧ B ∧ A
:= by (apply and_intro, beta, exact, apply and_intro, !exact)