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lexer.h
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lexer.h
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/* Copyright (C) 2021 by Alexandru-Sergiu Marton
This file is part of shell243.
shell243 is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
shell243 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with shell243. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SH243_LEXER_H
#define SH243_LEXER_H
// Whenever adding new token types, remember to update debug.c!
typedef enum token_type
{
TOK_GT, TOK_DGT, TOK_LT, TOK_DLT,
TOK_PIPE, TOK_AMP, TOK_OR, TOK_AND,
TOK_IONUM,
TOK_SEMI,
TOK_WORD,
TOK_ERR,
TOK_EOF
} token_type;
typedef struct stream
{
char *start;
char *current;
} stream;
extern stream stm;
typedef struct token
{
token_type type;
const char *start;
int length;
} token;
void
init_lexer ();
token
next_token ();
#endif