[antlr-interest] multiple slashes
William Lam
xeenman at yahoo.com
Wed Feb 18 19:03:56 PST 2004
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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