74 lines
2.1 KiB
C++
74 lines
2.1 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 "kernel/instantiate.h"
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#include "library/compiler/compiler_step_visitor.h"
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#include "library/compiler/comp_irrelevant.h"
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namespace lean {
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compiler_step_visitor::compiler_step_visitor(environment const & env):
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m_env(env),
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m_ctx(env, transparency_mode::All) {
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}
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compiler_step_visitor::~compiler_step_visitor() {
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}
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expr compiler_step_visitor::visit_lambda_let(expr const & e) {
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type_context::tmp_locals locals(m_ctx);
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expr t = e;
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while (true) {
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/* Types are ignored in compilation steps. So, we do not invoke visit for d. */
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if (is_lambda(t)) {
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expr d = instantiate_rev(binding_domain(t), locals.size(), locals.data());
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locals.push_local(binding_name(t), d, binding_info(t));
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t = binding_body(t);
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} else if (is_let(t)) {
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expr d = instantiate_rev(let_type(t), locals.size(), locals.data());
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expr v = visit(instantiate_rev(let_value(t), locals.size(), locals.data()));
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locals.push_let(let_name(t), d, v);
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t = let_body(t);
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} else {
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break;
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}
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}
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t = instantiate_rev(t, locals.size(), locals.data());
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t = visit(t);
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return locals.mk_lambda(t);
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}
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expr compiler_step_visitor::visit_lambda(expr const & e) {
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return visit_lambda_let(e);
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}
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expr compiler_step_visitor::visit_let(expr const & e) {
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return visit_lambda_let(e);
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}
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expr compiler_step_visitor::visit_macro(expr const & e) {
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if (is_marked_as_comp_irrelevant(e))
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return e;
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else
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return replace_visitor::visit_macro(e);
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}
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expr compiler_step_visitor::visit_app(expr const & e) {
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buffer<expr> args;
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expr const & fn = get_app_args(e, args);
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expr new_fn = visit(fn);
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bool modified = !is_eqp(fn, new_fn);
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for (expr & arg : args) {
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expr new_arg = visit(arg);
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if (!is_eqp(new_arg, arg))
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modified = true;
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arg = new_arg;
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}
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if (!modified)
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return e;
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else
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return mk_app(new_fn, args);
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}
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}
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