[antlr-interest] multiple slashes

[William Lam]

Hi all,

I need to parse a language that treats forward slash '/' as both a 
delimiter and as the divide character.

identifiers can be standalone or have the forward slash joining them 
together

foo

or

/foo/bar/car

so we can have instances of

/foo/bar/car.zoo/a     <---- z/foo/bar/car.oo is being divided by a

or

foo/bar          <---------- foo divided by bar

or

a//foo/bar/car.zoo  <------- a divided by /foo/bar/car.zoo

in my grammar i have a rule

expression
    :    identifier ( DIVIDE identifier)
    ;

in my lexer I have a rule

identifier
    :    alpha
    |    delimited_identifier
    ;

divide
    :    '/' ( {_ttype=delimited_identifier } alpha ( '/' alpha )* )?
    ;

alpha options { testLiterals=true; }
   :    'a' .. 'z' ( 'a' .. 'z' | '0' .. '9' | '_' | '$' | '#' )*
   ;
these rules can match

/a/b//c    <---- /a/b divided by /c

but cannot match simple examples such as a/b

any ideas?

wil



 
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