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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef MICROPY_INCLUDED_PY_SCOPE_H
#define MICROPY_INCLUDED_PY_SCOPE_H
#include "py/parse.h"
#include "py/emitglue.h"
typedef enum {
ID_INFO_KIND_UNDECIDED,
ID_INFO_KIND_GLOBAL_IMPLICIT,
ID_INFO_KIND_GLOBAL_IMPLICIT_ASSIGNED,
ID_INFO_KIND_GLOBAL_EXPLICIT,
ID_INFO_KIND_LOCAL, // in a function f, written and only referenced by f
ID_INFO_KIND_CELL, // in a function f, read/written by children of f
ID_INFO_KIND_FREE, // in a function f, belongs to the parent of f
} id_info_kind_t;
enum {
ID_FLAG_IS_PARAM = 0x01,
ID_FLAG_IS_STAR_PARAM = 0x02,
ID_FLAG_IS_DBL_STAR_PARAM = 0x04,
ID_FLAG_VIPER_TYPE_POS = 4,
};
typedef struct _id_info_t {
uint8_t kind;
uint8_t flags;
// when it's an ID_INFO_KIND_LOCAL this is the unique number of the local
// whet it's an ID_INFO_KIND_CELL/FREE this is the unique number of the closed over variable
uint16_t local_num;
qstr qst;
} id_info_t;
#define SCOPE_IS_FUNC_LIKE(s) ((s) >= SCOPE_LAMBDA)
#define SCOPE_IS_COMP_LIKE(s) (SCOPE_LIST_COMP <= (s) && (s) <= SCOPE_GEN_EXPR)
// scope is a "block" in Python parlance
typedef enum {
SCOPE_MODULE,
SCOPE_CLASS,
SCOPE_LAMBDA,
SCOPE_LIST_COMP,
SCOPE_DICT_COMP,
SCOPE_SET_COMP,
SCOPE_GEN_EXPR,
SCOPE_FUNCTION,
} scope_kind_t;
typedef struct _scope_t {
scope_kind_t kind;
struct _scope_t *parent;
struct _scope_t *next;
mp_parse_node_t pn;
mp_raw_code_t *raw_code;
uint16_t simple_name; // a qstr
uint16_t scope_flags; // see runtime0.h
uint16_t emit_options; // see emitglue.h
uint16_t num_pos_args;
uint16_t num_kwonly_args;
uint16_t num_def_pos_args;
uint16_t num_locals;
uint16_t stack_size; // maximum size of the locals stack
uint16_t exc_stack_size; // maximum size of the exception stack
uint16_t id_info_alloc;
uint16_t id_info_len;
id_info_t *id_info;
} scope_t;
scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, mp_uint_t emit_options);
void scope_free(scope_t *scope);
id_info_t *scope_find_or_add_id(scope_t *scope, qstr qstr, id_info_kind_t kind);
id_info_t *scope_find(scope_t *scope, qstr qstr);
id_info_t *scope_find_global(scope_t *scope, qstr qstr);
void scope_check_to_close_over(scope_t *scope, id_info_t *id);
#endif // MICROPY_INCLUDED_PY_SCOPE_H
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