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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_LEXER_H
#define MICROPY_INCLUDED_PY_LEXER_H
#include <stdint.h>
#include "py/mpconfig.h"
#include "py/qstr.h"
#include "py/reader.h"
/* lexer.h -- simple tokeniser for MicroPython
*
* Uses (byte) length instead of null termination.
* Tokens are the same - UTF-8 with (byte) length.
*/
typedef enum _mp_token_kind_t {
MP_TOKEN_END,
MP_TOKEN_INVALID,
MP_TOKEN_DEDENT_MISMATCH,
MP_TOKEN_LONELY_STRING_OPEN,
#if MICROPY_PY_FSTRINGS
MP_TOKEN_MALFORMED_FSTRING,
#endif
MP_TOKEN_NEWLINE,
MP_TOKEN_INDENT,
MP_TOKEN_DEDENT,
MP_TOKEN_NAME,
MP_TOKEN_INTEGER,
MP_TOKEN_FLOAT_OR_IMAG,
MP_TOKEN_STRING,
MP_TOKEN_BYTES,
MP_TOKEN_ELLIPSIS,
MP_TOKEN_KW_FALSE,
MP_TOKEN_KW_NONE,
MP_TOKEN_KW_TRUE,
MP_TOKEN_KW___DEBUG__,
MP_TOKEN_KW_AND,
MP_TOKEN_KW_AS,
MP_TOKEN_KW_ASSERT,
#if MICROPY_PY_ASYNC_AWAIT
MP_TOKEN_KW_ASYNC,
MP_TOKEN_KW_AWAIT,
#endif
MP_TOKEN_KW_BREAK,
MP_TOKEN_KW_CLASS,
MP_TOKEN_KW_CONTINUE,
MP_TOKEN_KW_DEF,
MP_TOKEN_KW_DEL,
MP_TOKEN_KW_ELIF,
MP_TOKEN_KW_ELSE,
MP_TOKEN_KW_EXCEPT,
MP_TOKEN_KW_FINALLY,
MP_TOKEN_KW_FOR,
MP_TOKEN_KW_FROM,
MP_TOKEN_KW_GLOBAL,
MP_TOKEN_KW_IF,
MP_TOKEN_KW_IMPORT,
MP_TOKEN_KW_IN,
MP_TOKEN_KW_IS,
MP_TOKEN_KW_LAMBDA,
MP_TOKEN_KW_NONLOCAL,
MP_TOKEN_KW_NOT,
MP_TOKEN_KW_OR,
MP_TOKEN_KW_PASS,
MP_TOKEN_KW_RAISE,
MP_TOKEN_KW_RETURN,
MP_TOKEN_KW_TRY,
MP_TOKEN_KW_WHILE,
MP_TOKEN_KW_WITH,
MP_TOKEN_KW_YIELD,
MP_TOKEN_OP_ASSIGN,
MP_TOKEN_OP_TILDE,
// Order of these 6 matches corresponding mp_binary_op_t operator
MP_TOKEN_OP_LESS,
MP_TOKEN_OP_MORE,
MP_TOKEN_OP_DBL_EQUAL,
MP_TOKEN_OP_LESS_EQUAL,
MP_TOKEN_OP_MORE_EQUAL,
MP_TOKEN_OP_NOT_EQUAL,
// Order of these 13 matches corresponding mp_binary_op_t operator
MP_TOKEN_OP_PIPE,
MP_TOKEN_OP_CARET,
MP_TOKEN_OP_AMPERSAND,
MP_TOKEN_OP_DBL_LESS,
MP_TOKEN_OP_DBL_MORE,
MP_TOKEN_OP_PLUS,
MP_TOKEN_OP_MINUS,
MP_TOKEN_OP_STAR,
MP_TOKEN_OP_AT,
MP_TOKEN_OP_DBL_SLASH,
MP_TOKEN_OP_SLASH,
MP_TOKEN_OP_PERCENT,
MP_TOKEN_OP_DBL_STAR,
// Order of these 13 matches corresponding mp_binary_op_t operator
MP_TOKEN_DEL_PIPE_EQUAL,
MP_TOKEN_DEL_CARET_EQUAL,
MP_TOKEN_DEL_AMPERSAND_EQUAL,
MP_TOKEN_DEL_DBL_LESS_EQUAL,
MP_TOKEN_DEL_DBL_MORE_EQUAL,
MP_TOKEN_DEL_PLUS_EQUAL,
MP_TOKEN_DEL_MINUS_EQUAL,
MP_TOKEN_DEL_STAR_EQUAL,
MP_TOKEN_DEL_AT_EQUAL,
MP_TOKEN_DEL_DBL_SLASH_EQUAL,
MP_TOKEN_DEL_SLASH_EQUAL,
MP_TOKEN_DEL_PERCENT_EQUAL,
MP_TOKEN_DEL_DBL_STAR_EQUAL,
MP_TOKEN_DEL_PAREN_OPEN,
MP_TOKEN_DEL_PAREN_CLOSE,
MP_TOKEN_DEL_BRACKET_OPEN,
MP_TOKEN_DEL_BRACKET_CLOSE,
MP_TOKEN_DEL_BRACE_OPEN,
MP_TOKEN_DEL_BRACE_CLOSE,
MP_TOKEN_DEL_COMMA,
MP_TOKEN_DEL_COLON,
MP_TOKEN_DEL_PERIOD,
MP_TOKEN_DEL_SEMICOLON,
MP_TOKEN_DEL_EQUAL,
MP_TOKEN_DEL_MINUS_MORE,
MP_TOKEN_NUMBER_OF,
} mp_token_kind_t;
// this data structure is exposed for efficiency
// public members are: source_name, tok_line, tok_column, tok_kind, vstr
typedef struct _mp_lexer_t {
qstr source_name; // name of source
mp_reader_t reader; // stream source
unichar chr0, chr1, chr2; // current cached characters from source
#if MICROPY_PY_FSTRINGS
unichar chr0_saved, chr1_saved, chr2_saved; // current cached characters from alt source
#endif
size_t line; // current source line
size_t column; // current source column
mp_int_t emit_dent; // non-zero when there are INDENT/DEDENT tokens to emit
mp_int_t nested_bracket_level; // >0 when there are nested brackets over multiple lines
size_t alloc_indent_level;
size_t num_indent_level;
uint16_t *indent_level;
size_t tok_line; // token source line
size_t tok_column; // token source column
mp_token_kind_t tok_kind; // token kind
vstr_t vstr; // token data
#if MICROPY_PY_FSTRINGS
vstr_t fstring_args; // extracted arguments to pass to .format()
size_t fstring_args_idx; // how many bytes of fstring_args have been read
#endif
} mp_lexer_t;
mp_lexer_t *mp_lexer_new(qstr src_name, mp_reader_t reader);
mp_lexer_t *mp_lexer_new_from_str_len(qstr src_name, const char *str, size_t len, size_t free_len);
// If MICROPY_READER_POSIX or MICROPY_READER_VFS aren't enabled then
// this function must be implemented by the port.
mp_lexer_t *mp_lexer_new_from_file(qstr filename);
#if MICROPY_HELPER_LEXER_UNIX
mp_lexer_t *mp_lexer_new_from_fd(qstr filename, int fd, bool close_fd);
#endif
void mp_lexer_free(mp_lexer_t *lex);
void mp_lexer_to_next(mp_lexer_t *lex);
#endif // MICROPY_INCLUDED_PY_LEXER_H
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