forked from jasder/antlr
87 lines
2.0 KiB
ANTLR
87 lines
2.0 KiB
ANTLR
lexer grammar TLexer;
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// These are all supported lexer sections:
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// Lexer file header. Appears at the top of h + cpp files. Use e.g. for copyrights.
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@lexer::header {/* lexer header section */}
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// Appears before any #include in h + cpp files.
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@lexer::preinclude {/* lexer precinclude section */}
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// Follows directly after the standard #includes in h + cpp files.
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@lexer::postinclude {
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/* lexer postinclude section */
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#ifndef _WIN32
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#pragma GCC diagnostic ignored "-Wunused-parameter"
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#endif
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}
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// Directly preceds the lexer class declaration in the h file (e.g. for additional types etc.).
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@lexer::context {/* lexer context section */}
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// Appears in the public part of the lexer in the h file.
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@lexer::members {/* public lexer declarations section */
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bool canTestFoo() { return true; }
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bool isItFoo() { return true; }
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bool isItBar() { return true; }
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void myFooLexerAction() { /* do something*/ };
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void myBarLexerAction() { /* do something*/ };
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}
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// Appears in the private part of the lexer in the h file.
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@lexer::declarations {/* private lexer declarations/members section */}
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// Appears in line with the other class member definitions in the cpp file.
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@lexer::definitions {/* lexer definitions section */}
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channels { CommentsChannel, DirectiveChannel }
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tokens {
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DUMMY
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}
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Return: 'return';
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Continue: 'continue';
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INT: Digit+;
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Digit: [0-9];
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ID: LETTER (LETTER | '0'..'9')*;
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fragment LETTER : [a-zA-Z\u0080-\u{10FFFF}];
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LessThan: '<';
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GreaterThan: '>';
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Equal: '=';
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And: 'and';
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Colon: ':';
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Semicolon: ';';
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Plus: '+';
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Minus: '-';
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Star: '*';
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OpenPar: '(';
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ClosePar: ')';
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OpenCurly: '{' -> pushMode(Mode1);
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CloseCurly: '}' -> popMode;
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QuestionMark: '?';
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Comma: ',' -> skip;
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Dollar: '$' -> more, mode(Mode1);
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Ampersand: '&' -> type(DUMMY);
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String: '"' .*? '"';
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Foo: {canTestFoo()}? 'foo' {isItFoo()}? { myFooLexerAction(); };
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Bar: 'bar' {isItBar()}? { myBarLexerAction(); };
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Any: Foo Dot Bar? DotDot Baz;
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Comment : '#' ~[\r\n]* '\r'? '\n' -> channel(CommentsChannel);
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WS: [ \t\r\n]+ -> channel(99);
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fragment Baz: 'Baz';
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mode Mode1;
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Dot: '.';
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mode Mode2;
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DotDot: '..';
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