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Diffstat (limited to 'src/Python3Lexer.g4')
| -rw-r--r-- | src/Python3Lexer.g4 | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/Python3Lexer.g4 b/src/Python3Lexer.g4 new file mode 100644 index 0000000..8d53301 --- /dev/null +++ b/src/Python3Lexer.g4 @@ -0,0 +1,131 @@ +/* + La grammatica di Python si trova a + https://docs.python.org/3/reference/grammar.html + + Questa e` stata elaborata da Bart Kiers, bart@big-o.nl + e si trova a https://github.com/bkiers/python3-parser + + Semplificata ai fini del corso di CLP -- Marco Bertoni, Cosimo Laneve +*/ + +// $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 Python3Lexer; + +tokens { + INDENT, + DEDENT +} + +options { + superClass = Python3LexerBase; +} + +STRING : '\'' (STRING_ESCAPE_SEQ | ~[\\\r\n\f'])* '\'' + | '"' ( STRING_ESCAPE_SEQ | ~[\\\r\n\f"])* '"' + ; + +NUMBER : DECIMAL_INTEGER | FLOAT_NUMBER ; + +AND : 'and'; +AS : 'as'; +DEF : 'def'; +ELIF : 'elif'; +ELSE : 'else'; +FALSE : 'False'; +FOR : 'for'; +FROM : 'from'; +IF : 'if'; +IMPORT : 'import'; +IN : 'in'; +IS : 'is'; +NONE : 'None'; +NOT : 'not'; +OR : 'or'; +RETURN : 'return'; +TRUE : 'True'; +UNDERSCORE : '_'; +WHILE : 'while'; + +NEWLINE: ({this.atStartOfInput()}? SPACES | ( '\r'? '\n' | '\r' | '\f') SPACES?) {this.onNewLine();}; + +NAME: ('_' | 'a'..'z' | 'A'..'Z') ('_' | 'a'..'z' | 'A'..'Z' | '0'..'9')* + ; + +DECIMAL_INTEGER: NON_ZERO_DIGIT DIGIT* | '0'+; + +FLOAT_NUMBER: POINT_FLOAT | EXPONENT_FLOAT; + +DOT : '.'; +ELLIPSIS : '...'; +STAR : '*'; +OPEN_PAREN : '(' {this.openBrace();}; +CLOSE_PAREN : ')' {this.closeBrace();}; +COMMA : ','; +COLON : ':'; +SEMI_COLON : ';'; +POWER : '**'; +ASSIGN : '='; +OPEN_BRACK : '[' {this.openBrace();}; +CLOSE_BRACK : ']' {this.closeBrace();}; +OR_OP : '|'; +XOR : '^'; +AND_OP : '&'; +LEFT_SHIFT : '<<'; +RIGHT_SHIFT : '>>'; +ADD : '+'; +MINUS : '-'; +DIV : '/'; +MOD : '%'; +IDIV : '//'; +NOT_OP : '~'; +OPEN_BRACE : '{' {this.openBrace();}; +CLOSE_BRACE : '}' {this.closeBrace();}; +LESS_THAN : '<'; +GREATER_THAN : '>'; +EQUALS : '=='; +GT_EQ : '>='; +LT_EQ : '<='; +NOT_EQ_1 : '<>'; +NOT_EQ_2 : '!='; +AT : '@'; +ARROW : '->'; +ADD_ASSIGN : '+='; +SUB_ASSIGN : '-='; +MULT_ASSIGN : '*='; +AT_ASSIGN : '@='; +DIV_ASSIGN : '/='; +MOD_ASSIGN : '%='; +AND_ASSIGN : '&='; +OR_ASSIGN : '|='; +XOR_ASSIGN : '^='; +LEFT_SHIFT_ASSIGN : '<<='; +RIGHT_SHIFT_ASSIGN : '>>='; +POWER_ASSIGN : '**='; +IDIV_ASSIGN : '//='; + +SKIP_: ( SPACES | COMMENT | LINE_JOINING) -> skip; + +UNKNOWN_CHAR: .; + +fragment STRING_ESCAPE_SEQ: '\\' . | '\\' NEWLINE; + +fragment NON_ZERO_DIGIT: [1-9]; + +fragment DIGIT: [0-9]; + +fragment POINT_FLOAT: INT_PART? '.' DIGIT+ | INT_PART '.'; + +fragment EXPONENT_FLOAT: ( INT_PART | POINT_FLOAT) EXPONENT; + +fragment INT_PART: DIGIT+; + +fragment EXPONENT: [eE] [+-]? DIGIT+; + +fragment SPACES: [ \t]+; + +fragment COMMENT: '#' ~[\r\n\f]*; + +fragment LINE_JOINING: '\\' SPACES? ( '\r'? '\n' | '\r' | '\f');
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