parse just a context of grammar

[wilkerlucio]

Hi, Im implementing an CSS parser with Jison, but sometimes I will need to use just a context of grammar, instead it all.

For example, a full parse works ok with this:

body { background: #fff }

but sometimes I just wanna parse the Attributes context, like:

background: #fff

Will be nice to be able to do something like:

attributes = parser.parse("background: #fff", "Attributes")

[zaach]

This is a challenge of designing any parser based on context free grammars. How it is solved depends on the methods you prefer. You could use two separate parsers in conjunction and it would look similar to your example. You could also try using flags and start conditions, which Jison supports.