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asm: move grammar stuff from lexer.c to lexer/grammar.h

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Henrik Hautakoski 2019-03-29 15:34:55 +01:00
parent 6611095364
commit caed36a936
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2 changed files with 50 additions and 29 deletions
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/* lexer/grammar.h
*
* Macros for the grammar.
*
* Copyright (C) 2018-2019 Henrik Hautakoski <henrik.hautakoski@gmail.com>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#ifndef ASM_LEXER_GRAMMAR_H
#define ASM_LEXER_GRAMMAR_H
// Numbers is defined as [0-9]
#define lexer_is_num(x) ((x) >= '0' && (x) <= '9')
// The first digit can however also contain '-'
#define lexer_is_num_start(x) (lexer_is_num(x) || (x) == '-' )
// First character in strings can be [a-z][A-Z] or '_'
#define lexer_is_string_start(x) \
( ((x) >= 'a' && (x) <= 'z') \
|| ((x) >= 'A' && (x) <= 'Z') \
|| (x) == '_' )
// All characters after can also include numbers or ':'
#define lexer_is_string(x) \
(lexer_is_string_start(x) || lexer_is_num(x))
#define lexer_is_space(x) ((x) == ' ' || (x) == '\t' || (x) == '\r')
#endif /* ASM_LEXER_GRAMMAR_H */