220 lines
6.6 KiB
C
220 lines
6.6 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h>
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#include "py/emit.h"
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struct _emit_t {
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scope_t *scope;
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};
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emit_t *emit_pass1_new(void) {
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emit_t *emit = m_new(emit_t, 1);
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return emit;
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}
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void emit_pass1_free(emit_t *emit) {
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m_del_obj(emit_t, emit);
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}
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STATIC void emit_pass1_dummy(emit_t *emit) {
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}
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STATIC void emit_pass1_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
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assert(pass == MP_PASS_SCOPE);
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emit->scope = scope;
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}
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STATIC void emit_pass1_end_pass(emit_t *emit) {
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}
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STATIC bool emit_pass1_last_emit_was_return_value(emit_t *emit) {
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return false;
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}
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STATIC void emit_pass1_load_id(emit_t *emit, qstr qst) {
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// name adding/lookup
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bool added;
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id_info_t *id = scope_find_or_add_id(emit->scope, qst, &added);
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if (added) {
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#if MICROPY_EMIT_CPYTHON
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if (qst == MP_QSTR_super && emit->scope->kind == SCOPE_FUNCTION) {
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// special case, super is a global, and also counts as use of __class__
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id->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
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id_info_t *id2 = scope_find_local_in_parent(emit->scope, MP_QSTR___class__);
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if (id2 != NULL) {
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id2 = scope_find_or_add_id(emit->scope, MP_QSTR___class__, &added);
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if (added) {
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id2->kind = ID_INFO_KIND_FREE;
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scope_close_over_in_parents(emit->scope, MP_QSTR___class__);
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}
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}
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} else
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#endif
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{
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id_info_t *id2 = scope_find_local_in_parent(emit->scope, qst);
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if (id2 != NULL && (id2->kind == ID_INFO_KIND_LOCAL || id2->kind == ID_INFO_KIND_CELL || id2->kind == ID_INFO_KIND_FREE)) {
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id->kind = ID_INFO_KIND_FREE;
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scope_close_over_in_parents(emit->scope, qst);
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} else {
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id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
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}
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}
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}
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}
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STATIC id_info_t *get_id_for_modification(scope_t *scope, qstr qst) {
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// name adding/lookup
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bool added;
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id_info_t *id = scope_find_or_add_id(scope, qst, &added);
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if (added) {
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if (scope->kind == SCOPE_MODULE || scope->kind == SCOPE_CLASS) {
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id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
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} else {
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id->kind = ID_INFO_KIND_LOCAL;
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}
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} else if (scope->kind >= SCOPE_FUNCTION && scope->kind <= SCOPE_GEN_EXPR && id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
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// rebind as a local variable
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id->kind = ID_INFO_KIND_LOCAL;
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}
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assert(id != NULL); // TODO can this ever fail?
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return id;
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}
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STATIC void emit_pass1_store_id(emit_t *emit, qstr qst) {
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get_id_for_modification(emit->scope, qst);
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}
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STATIC void emit_pass1_delete_id(emit_t *emit, qstr qst) {
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id_info_t *id = get_id_for_modification(emit->scope, qst);
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// this flag is unused
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//id->flags |= ID_FLAG_IS_DELETED;
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(void)id; // suppress compiler warning
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}
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const emit_method_table_t emit_pass1_method_table = {
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(void*)emit_pass1_dummy,
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emit_pass1_start_pass,
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emit_pass1_end_pass,
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emit_pass1_last_emit_was_return_value,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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emit_pass1_load_id,
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emit_pass1_store_id,
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emit_pass1_delete_id,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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#if MICROPY_PY_BUILTINS_SET
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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#endif
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#if MICROPY_PY_BUILTINS_SLICE
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(void*)emit_pass1_dummy,
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#endif
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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#if MICROPY_EMIT_CPYTHON
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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(void*)emit_pass1_dummy,
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#endif
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};
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