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| | /*
* Copyright (C) 2024 olang maintainers
*
* This program 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.
*
* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LEXER_H
#define LEXER_H
#include "string_view.h"
#include <stdint.h>
#include <stdio.h>
typedef struct source_code {
char *filepath;
string_view_t code;
} source_code_t;
typedef struct lexer_cursor {
size_t offset;
size_t row;
size_t bol;
} lexer_cursor_t;
typedef struct lexer {
source_code_t src;
lexer_cursor_t cur;
} lexer_t;
typedef enum token_kind {
TOKEN_UNKNOWN,
TOKEN_ID,
TOKEN_NUMBER,
// Keywords
TOKEN_FN,
TOKEN_RETURN,
TOKEN_IF,
TOKEN_ELSE,
TOKEN_WHILE,
TOKEN_VAR,
// Equality operators
TOKEN_CMP_EQ,
TOKEN_CMP_NEQ,
TOKEN_CMP_LEQ,
TOKEN_CMP_GEQ,
// Logical Operators
TOKEN_LOGICAL_OR,
TOKEN_LOGICAL_AND,
// Bitwise Operators
TOKEN_BITWISE_LSHIFT,
TOKEN_BITWISE_RSHIFT,
// Single char
TOKEN_BANG,
TOKEN_GT,
TOKEN_LT,
TOKEN_PERCENT,
TOKEN_AND,
TOKEN_PIPE,
TOKEN_CIRCUMFLEX,
TOKEN_EQ,
TOKEN_PLUS,
TOKEN_DASH,
TOKEN_SLASH,
TOKEN_STAR,
TOKEN_TILDE,
TOKEN_LF,
TOKEN_OPAREN,
TOKEN_CPAREN,
TOKEN_COLON,
TOKEN_COMMA,
TOKEN_OCURLY,
TOKEN_CCURLY,
TOKEN_EOF
} token_kind_t;
typedef struct token_loc {
source_code_t src;
lexer_cursor_t cur;
} token_loc_t;
typedef struct token {
token_kind_t kind;
string_view_t value;
token_loc_t loc;
} token_t;
size_t
token_loc_to_lineno(token_loc_t loc);
size_t
token_loc_to_colno(token_loc_t loc);
void
lexer_init(lexer_t *lexer, source_code_t src);
void
lexer_next_token(lexer_t *lexer, token_t *token);
void
lexer_peek_next(lexer_t *lexer, token_t *token);
void
lexer_lookahead(lexer_t *lexer, token_t *token, size_t n);
char *
token_kind_to_cstr(token_kind_t kind);
bool
token_kind_is_binary_op(token_kind_t kind);
string_view_t
token_loc_to_line(token_loc_t loc);
#endif /* LEXER_H */
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