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| /* | ||
| [The "BSD licence"] | ||
| Copyright (c) 2013 Terence Parr, Sam Harwell | ||
| Copyright (c) 2017 Ivan Kochurkin (upgrade to Java 8) | ||
| Copyright (c) 2021 Michał Lorek (upgrade to Java 11) | ||
| Copyright (c) 2022 Michał Lorek (upgrade to Java 17) | ||
| All rights reserved. | ||
| Redistribution and use in source and binary forms, with or without | ||
| modification, are permitted provided that the following conditions | ||
| are met: | ||
| 1. Redistributions of source code must retain the above copyright | ||
| notice, this list of conditions and the following disclaimer. | ||
| 2. Redistributions in binary form must reproduce the above copyright | ||
| notice, this list of conditions and the following disclaimer in the | ||
| documentation and/or other materials provided with the distribution. | ||
| 3. The name of the author may not be used to endorse or promote products | ||
| derived from this software without specific prior written permission. | ||
| THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | ||
| IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | ||
| OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | ||
| IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | ||
| NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | ||
| DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | ||
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | ||
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
||
| // $antlr-format alignTrailingComments true, columnLimit 150, maxEmptyLinesToKeep 1, reflowComments false, useTab false | ||
| // $antlr-format allowShortRulesOnASingleLine true, allowShortBlocksOnASingleLine true, minEmptyLines 0, alignSemicolons ownLine | ||
| // $antlr-format alignColons trailing, singleLineOverrulesHangingColon true, alignLexerCommands true, alignLabels true, alignTrailers true | ||
|
|
||
| lexer grammar JavaLexer; | ||
|
|
||
| // Keywords | ||
|
|
||
| ABSTRACT : 'abstract'; | ||
| ASSERT : 'assert'; | ||
| BOOLEAN : 'boolean'; | ||
| BREAK : 'break'; | ||
| BYTE : 'byte'; | ||
| CASE : 'case'; | ||
| CATCH : 'catch'; | ||
| CHAR : 'char'; | ||
| CLASS : 'class'; | ||
| CONST : 'const'; | ||
| CONTINUE : 'continue'; | ||
| DEFAULT : 'default'; | ||
| DO : 'do'; | ||
| DOUBLE : 'double'; | ||
| ELSE : 'else'; | ||
| ENUM : 'enum'; | ||
| EXTENDS : 'extends'; | ||
| FINAL : 'final'; | ||
| FINALLY : 'finally'; | ||
| FLOAT : 'float'; | ||
| FOR : 'for'; | ||
| IF : 'if'; | ||
| GOTO : 'goto'; | ||
| IMPLEMENTS : 'implements'; | ||
| IMPORT : 'import'; | ||
| INSTANCEOF : 'instanceof'; | ||
| INT : 'int'; | ||
| INTERFACE : 'interface'; | ||
| LONG : 'long'; | ||
| NATIVE : 'native'; | ||
| NEW : 'new'; | ||
| PACKAGE : 'package'; | ||
| PRIVATE : 'private'; | ||
| PROTECTED : 'protected'; | ||
| PUBLIC : 'public'; | ||
| RETURN : 'return'; | ||
| SHORT : 'short'; | ||
| STATIC : 'static'; | ||
| STRICTFP : 'strictfp'; | ||
| SUPER : 'super'; | ||
| SWITCH : 'switch'; | ||
| SYNCHRONIZED : 'synchronized'; | ||
| THIS : 'this'; | ||
| THROW : 'throw'; | ||
| THROWS : 'throws'; | ||
| TRANSIENT : 'transient'; | ||
| TRY : 'try'; | ||
| VOID : 'void'; | ||
| VOLATILE : 'volatile'; | ||
| WHILE : 'while'; | ||
|
|
||
| // Module related keywords | ||
| MODULE : 'module'; | ||
| OPEN : 'open'; | ||
| REQUIRES : 'requires'; | ||
| EXPORTS : 'exports'; | ||
| OPENS : 'opens'; | ||
| TO : 'to'; | ||
| USES : 'uses'; | ||
| PROVIDES : 'provides'; | ||
| WITH : 'with'; | ||
| TRANSITIVE : 'transitive'; | ||
|
|
||
| // Local Variable Type Inference | ||
| VAR: 'var'; // reserved type name | ||
|
|
||
| // Switch Expressions | ||
| YIELD: 'yield'; // reserved type name from Java 14 | ||
|
|
||
| // Records | ||
| RECORD: 'record'; | ||
|
|
||
| // Sealed Classes | ||
| SEALED : 'sealed'; | ||
| PERMITS : 'permits'; | ||
| NON_SEALED : 'non-sealed'; | ||
|
|
||
| // Literals | ||
|
|
||
| DECIMAL_LITERAL : ('0' | [1-9] (Digits? | '_'+ Digits)) [lL]?; | ||
| HEX_LITERAL : '0' [xX] [0-9a-fA-F] ([0-9a-fA-F_]* [0-9a-fA-F])? [lL]?; | ||
| OCT_LITERAL : '0' '_'* [0-7] ([0-7_]* [0-7])? [lL]?; | ||
| BINARY_LITERAL : '0' [bB] [01] ([01_]* [01])? [lL]?; | ||
|
|
||
| FLOAT_LITERAL: | ||
| (Digits '.' Digits? | '.' Digits) ExponentPart? [fFdD]? | ||
| | Digits (ExponentPart [fFdD]? | [fFdD]) | ||
| ; | ||
|
|
||
| HEX_FLOAT_LITERAL: '0' [xX] (HexDigits '.'? | HexDigits? '.' HexDigits) [pP] [+-]? Digits [fFdD]?; | ||
|
|
||
| BOOL_LITERAL: 'true' | 'false'; | ||
|
|
||
| CHAR_LITERAL: '\'' (~['\\\r\n] | EscapeSequence) '\''; | ||
|
|
||
| STRING_LITERAL: '"' (~["\\\r\n] | EscapeSequence)* '"'; | ||
| TEXT_BLOCK: '"""' [ \t]* [\r\n] (. | EscapeSequence)*? '"""'; | ||
| NULL_LITERAL: 'null'; | ||
| // Separators | ||
| LPAREN : '('; | ||
| RPAREN : ')'; | ||
| LBRACE : '{'; | ||
| RBRACE : '}'; | ||
| LBRACK : '['; | ||
| RBRACK : ']'; | ||
| SEMI : ';'; | ||
| COMMA : ','; | ||
| DOT : '.'; | ||
| // Operators | ||
| ASSIGN : '='; | ||
| GT : '>'; | ||
| LT : '<'; | ||
| BANG : '!'; | ||
| TILDE : '~'; | ||
| QUESTION : '?'; | ||
| COLON : ':'; | ||
| EQUAL : '=='; | ||
| LE : '<='; | ||
| GE : '>='; | ||
| NOTEQUAL : '!='; | ||
| AND : '&&'; | ||
| OR : '||'; | ||
| INC : '++'; | ||
| DEC : '--'; | ||
| ADD : '+'; | ||
| SUB : '-'; | ||
| MUL : '*'; | ||
| DIV : '/'; | ||
| BITAND : '&'; | ||
| BITOR : '|'; | ||
| CARET : '^'; | ||
| MOD : '%'; | ||
| ADD_ASSIGN : '+='; | ||
| SUB_ASSIGN : '-='; | ||
| MUL_ASSIGN : '*='; | ||
| DIV_ASSIGN : '/='; | ||
| AND_ASSIGN : '&='; | ||
| OR_ASSIGN : '|='; | ||
| XOR_ASSIGN : '^='; | ||
| MOD_ASSIGN : '%='; | ||
| LSHIFT_ASSIGN : '<<='; | ||
| RSHIFT_ASSIGN : '>>='; | ||
| URSHIFT_ASSIGN : '>>>='; | ||
| // Java 8 tokens | ||
| ARROW : '->'; | ||
| COLONCOLON : '::'; | ||
| // Additional symbols not defined in the lexical specification | ||
| AT : '@'; | ||
| ELLIPSIS : '...'; | ||
| // Whitespace and comments | ||
| WS : [ \t\r\n\u000C]+ -> channel(HIDDEN); | ||
| COMMENT : '/*' .*? '*/' -> channel(HIDDEN); | ||
| LINE_COMMENT : '//' ~[\r\n]* -> channel(HIDDEN); | ||
|
|
||
| // Identifiers | ||
|
|
||
| IDENTIFIER: Letter LetterOrDigit*; | ||
|
|
||
| // Fragment rules | ||
|
|
||
| fragment ExponentPart: [eE] [+-]? Digits; | ||
|
|
||
| fragment EscapeSequence: | ||
| '\\' 'u005c'? [btnfr"'\\] | ||
| | '\\' 'u005c'? ([0-3]? [0-7])? [0-7] | ||
| | '\\' 'u'+ HexDigit HexDigit HexDigit HexDigit | ||
| ; | ||
| fragment HexDigits: HexDigit ((HexDigit | '_')* HexDigit)?; | ||
| fragment HexDigit: [0-9a-fA-F]; | ||
| fragment Digits: [0-9] ([0-9_]* [0-9])?; | ||
| fragment LetterOrDigit: Letter | [0-9]; | ||
| fragment Letter: | ||
| [a-zA-Z$_] // these are the "java letters" below 0x7F | ||
| | ~[\u0000-\u007F\uD800-\uDBFF] // covers all characters above 0x7F which are not a surrogate | ||
| | [\uD800-\uDBFF] [\uDC00-\uDFFF] // covers UTF-16 surrogate pairs encodings for U+10000 to U+10FFFF | ||
| ; |
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