73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
/*
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Copyright (c) 2016 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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#include <utility>
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#include <string>
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#include "kernel/replace_fn.h"
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#include "kernel/for_each_fn.h"
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#include "library/module.h"
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#include "library/head_map.h"
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#include "library/trace.h"
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#include "library/type_context.h"
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#include "library/tactic/occurrences.h"
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#include "library/tactic/tactic_state.h"
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namespace lean {
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expr kabstract(type_context_old & ctx, expr const & e, expr const & t, occurrences const & occs, bool unify) {
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lean_assert(!has_loose_bvars(e));
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head_index idx1(t);
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unsigned i = 1;
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unsigned t_nargs = get_app_num_args(t);
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return replace(e, [&](expr const & s, unsigned offset) {
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if (!has_loose_bvars(s)) {
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head_index idx2(s);
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if (idx1.kind() == idx2.kind() &&
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idx1.get_name() == idx2.get_name() &&
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/* fail if same function application and different number of arguments */
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(idx1.get_name() != idx2.get_name() || t_nargs == get_app_num_args(s)) &&
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((unify && ctx.unify(t, s)) || (!unify && ctx.match(t, s)))) {
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if (occs.contains(i)) {
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lean_trace("kabstract", scope_trace_env _(ctx.env(), ctx);
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tout() << "found target:\n" << s << "\n";);
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i++;
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return some_expr(mk_bvar(offset));
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} else {
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i++;
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}
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}
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}
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return none_expr();
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}, occs.is_all());
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}
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bool kdepends_on(type_context_old & ctx, expr const & e, expr const & t) {
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bool found = false;
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head_index idx1(t);
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unsigned t_nargs = get_app_num_args(t);
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for_each(e, [&](expr const & s, unsigned) {
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if (found) return false;
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if (!has_loose_bvars(s)) {
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head_index idx2(s);
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if (idx1.kind() == idx2.kind() &&
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idx1.get_name() == idx2.get_name() &&
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/* fail if same function application and different number of arguments */
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(idx1.get_name() != idx2.get_name() || t_nargs == get_app_num_args(s)) &&
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ctx.is_def_eq(t, s)) {
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found = true; return false;
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}
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}
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return true;
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});
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return found;
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}
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void initialize_kabstract() {
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register_trace_class("kabstract");
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}
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void finalize_kabstract() {
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}
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}
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