1 %{ 2 /* $NetBSD: scan.l,v 1.143 2024/12/08 17:12:01 rillig Exp $ */ 3 4 /* 5 * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved. 6 * Copyright (c) 1994, 1995 Jochen Pohl 7 * All Rights Reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Jochen Pohl for 20 * The NetBSD Project. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) 38 __RCSID("$NetBSD: scan.l,v 1.143 2024/12/08 17:12:01 rillig Exp $"); 39 #endif 40 41 #include "lint1.h" 42 #include "cgram.h" 43 44 %} 45 46 47 HEX [0-9A-Fa-f] 48 EXP ([eE][+-]?[0-9]+) 49 PEXP (p[+-]?[0-9A-Fa-f]+) 50 FSUF ([fFlL]?[i]?) 51 52 punctuator_1 [\[\](){}.]|-> 53 punctuator_2 {punctuator_1}|\+\+|--|[&*+\-~!] 54 punctuator_3 {punctuator_2}|\/|%|<<|>>|<|>|<=|>=|==|!=|\^|\||&&|\|\| 55 punctuator_4 {punctuator_3}|\?|:|::|;|\.\.\. 56 punctuator_5 {punctuator_4}|=|\*=|\/=|%=|\+=|-=|<<=|>>=|&=|\^=|\|= 57 punctuator_6 {punctuator_5}|,|#|## 58 punctuator_7 {punctuator_6}|<:|:>|<%|%>|%:|%:%: 59 punctuator {punctuator_7}|@ 60 61 %pointer 62 %option nounput 63 64 %x preprocessing 65 66 %% 67 68 [_A-Za-z][_A-Za-z0-9]* return lex_name(yytext, yyleng); 69 0[bB][01]+[lLuU]* return lex_integer_constant(yytext, yyleng, 2); 70 0[0-7]*[lLuU]* return lex_integer_constant(yytext, yyleng, 8); 71 [1-9][0-9]*[lLuU]* return lex_integer_constant(yytext, yyleng, 10); 72 0[xX]{HEX}+[lLuU]* return lex_integer_constant(yytext, yyleng, 16); 73 [0-9]+\.[0-9]*{EXP}?{FSUF} | 74 [0-9]+{EXP}{FSUF} | 75 0[xX]{HEX}+\.{HEX}*{PEXP}{FSUF} | 76 0[xX]{HEX}+{PEXP}{FSUF} | 77 \.[0-9]+{EXP}?{FSUF} return lex_floating_constant(yytext, yyleng); 78 "=" return T_ASSIGN; 79 "*=" return lex_operator(T_OPASSIGN, MULASS); 80 "/=" return lex_operator(T_OPASSIGN, DIVASS); 81 "%=" return lex_operator(T_OPASSIGN, MODASS); 82 "+=" return lex_operator(T_OPASSIGN, ADDASS); 83 "-=" return lex_operator(T_OPASSIGN, SUBASS); 84 "<<=" return lex_operator(T_OPASSIGN, SHLASS); 85 ">>=" return lex_operator(T_OPASSIGN, SHRASS); 86 "&=" return lex_operator(T_OPASSIGN, ANDASS); 87 "^=" return lex_operator(T_OPASSIGN, XORASS); 88 "|=" return lex_operator(T_OPASSIGN, ORASS); 89 "||" return T_LOGOR; 90 "&&" return T_LOGAND; 91 "|" return T_BITOR; 92 "&" return T_AMPER; 93 "^" return T_BITXOR; 94 "==" return lex_operator(T_EQUALITY, EQ); 95 "!=" return lex_operator(T_EQUALITY, NE); 96 "<" return lex_operator(T_RELATIONAL, LT); 97 ">" return lex_operator(T_RELATIONAL, GT); 98 "<=" return lex_operator(T_RELATIONAL, LE); 99 ">=" return lex_operator(T_RELATIONAL, GE); 100 "<<" return lex_operator(T_SHIFT, SHL); 101 ">>" return lex_operator(T_SHIFT, SHR); 102 "++" return yylval.y_inc = true, T_INCDEC; 103 "--" return yylval.y_inc = false, T_INCDEC; 104 "->" return T_ARROW; 105 "." return T_POINT; 106 "+" return lex_operator(T_ADDITIVE, PLUS); 107 "-" return lex_operator(T_ADDITIVE, MINUS); 108 "*" return T_ASTERISK; 109 "/" return lex_operator(T_MULTIPLICATIVE, DIV); 110 "%" return lex_operator(T_MULTIPLICATIVE, MOD); 111 "!" return T_LOGNOT; 112 "~" return T_COMPLEMENT; 113 "\"" return lex_string(); 114 "L\"" return lex_wide_string(); 115 ";" return T_SEMI; 116 "{" return T_LBRACE; 117 "}" return T_RBRACE; 118 "," return T_COMMA; 119 ":" return T_COLON; 120 "?" return T_QUEST; 121 "[" return T_LBRACK; 122 "]" return T_RBRACK; 123 "(" return T_LPAREN; 124 ")" return T_RPAREN; 125 "..." return T_ELLIPSIS; 126 "::" return T_DCOLON; 127 "'" return lex_character_constant(); 128 "L'" return lex_wide_character_constant(); 129 \n lex_next_line(); 130 \t|" "|\f|\v ; 131 "/*" lex_comment(); 132 "//" lex_slash_slash_comment(); 133 134 ^# { 135 BEGIN preprocessing; 136 lex_pp_begin(); 137 } 138 <preprocessing>[_A-Za-z][_A-Za-z0-9]* lex_pp_identifier(yytext); 139 <preprocessing>\.?[0-9]('?[_A-Za-z0-9]|[EePp][-+][0-9]+|\.)* lex_pp_number(yytext); 140 <preprocessing>\' lex_pp_character_constant(); 141 <preprocessing>\" lex_pp_string_literal(); 142 <preprocessing>{punctuator} lex_pp_punctuator(yytext); 143 <preprocessing>\/\* lex_pp_comment(); 144 <preprocessing>[ \f\t\v]+ lex_pp_whitespace(); 145 <preprocessing>. lex_unknown_character(yytext[0]); 146 <preprocessing>\n { 147 lex_pp_end(); 148 lex_next_line(); 149 BEGIN INITIAL; 150 } 151 152 . lex_unknown_character(yytext[0]); 153 154 %% 155 156 /* 157 * In the above list of regular expressions, the tokens for character 158 * constants, string literals and comments are incomplete; they only match 159 * a prefix. The remainder of these tokens is scanned by reading bytes 160 * directly from the input stream. 161 */ 162 int 163 lex_input(void) 164 { 165 return input(); 166 } 167
Indexes created Sun Sep 21 20:09:37 GMT 2025