Re: When to use parser rule and when lexer rule?

[alex;]

Hi.

May be so:

grammar MyTest;

myTestFile: line+ EOF;

line: Break Spaces? ((Word | NormalNumbers) Spaces?)+ ;

//Lexer

Word: Prefix? Char Char+ Suffix?;

NormalNumbers
    : Prefix? Numbers Suffix?;  

Numbers
    : LatinNumber | YearNumber | OtherNumber;

Spaces:    (Space)+;

Sign: Prefix | Suffix | Special ;

YearNumber
    : '(' '1' '9' Digit Digit ')'
    | '[' '1' '9' Digit Digit ']'
    | '1' '9' Digit Digit;

OtherNumber
    : [1-9] Digit* ;

LatinNumber
    : 'I' ('I' 'I'?)?  
    | 'I'? 'V' ('I' ('I' 'I'?)?)?  
    | 'I'? 'X' ('I' ('I' 'I'?)?)? 'V'? ('I' ('I' 'I'?)?)? ;

Space:        ' ';
Tab:        '\t';
Break:         '\n';
Digit:        [0-9];
Char:        [A-Z\u00C4\u00D6\u00DCa-z\u00E4\u00F6\u00FC\u00DF];
Prefix:        '"' | '\'' | '(' | '[';
Suffix:        '\u00AF' | '\u002d' | '.' | ',' | ':' | ';' | '!' | '?' | '"' | '\'' | ')' | ']';
Special:    [\u005e\u00ac\u2014\u201e\u2022/><§&{}#*~+\\];Введите код...