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feat(library/tactic/rewrite_tactic): use expensive convertability checker at reduce_to steps and trivial goal

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This commit is contained in:
Leonardo de Moura 2015-02-06 13:53:03 -08:00
parent 5b2a9dacc2
commit 7aac9f1fdb
1 changed files with 4 additions and 2 deletions
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6
src/library/tactic/rewrite_tactic.cpp
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@ -413,6 +413,7 @@ class rewrite_fn {
name_generator m_ngen;
type_checker_ptr m_tc;
type_checker_ptr m_matcher_tc;
type_checker_ptr m_unifier_tc; // reduce_to and check_trivial
rewrite_match_plugin m_mplugin;
goal m_g;
local_context m_ctx;
@ -550,7 +551,7 @@ class rewrite_fn {
buffer<constraint> cs;
to_buffer(ecs.second, cs);
constraint_seq cs_seq;
if (!m_tc->is_def_eq(t, new_e, justification(), cs_seq))
if (!m_unifier_tc->is_def_eq(t, new_e, justification(), cs_seq))
return none_expr();
cs_seq.linearize(cs);
unifier_config cfg;
@ -999,7 +1000,7 @@ class rewrite_fn {
constraint_seq cs;
expr lhs = app_arg(app_fn(type));
expr rhs = app_arg(type);
if (m_tc->is_def_eq(lhs, rhs, justification(), cs) && !cs) {
if (m_unifier_tc->is_def_eq(lhs, rhs, justification(), cs) && !cs) {
expr H = mk_refl(*m_tc, lhs);
m_subst.assign(m_g.get_name(), m_g.abstract(H));
return true;
@ -1028,6 +1029,7 @@ public:
m_env(env), m_ios(ios), m_elab(elab), m_ps(ps), m_ngen(ps.get_ngen()),
m_tc(mk_type_checker(m_env, m_ngen.mk_child(), ps.relax_main_opaque(), OpaqueIfNotReducibleOn)),
m_matcher_tc(mk_matcher_tc()),
m_unifier_tc(mk_type_checker(m_env, m_ngen.mk_child(), ps.relax_main_opaque())),
m_mplugin(m_ios, *m_matcher_tc) {
goals const & gs = m_ps.get_goals();
lean_assert(gs);