Label for separator in AT_LEAST_ONE_SEP/MANY_SEP

[tlrobinson]

As far as I can tell there's no way to label the SEP in AT_LEAST_ONE_SEP/MANY_SEP. Sometimes it would be convenient to do so.

Maybe something like SEP_LABEL or LABEL_SEP?

[bd82]

I am actually interested in deprecating the _SEP variants.

This is because they could now be accomplished by composing the basic building blocks.

• See: User Defined Macros #1004

Maybe something like:

class Foo {
   MANY_SEP_LABEL(idx, {ELEMENT, SEP, LABEL}) {
       this.option(idx + 10, () => {
          ELEMENT();  
       }) 
       this.many(idx + 10, () => {
           this.consume(idx + 10, SEP, {LABEL:LABEL})
           ELEMENT();             
       })
   }
}

• I did not actually try to run this code 😄

The tricky part is that while Chevrotain DSL is now composable the limitation on
having unique suffix indices still exists so collisions (within a single rule) must be avoided (why we do the +10)
There is also a limitation on the max indice size but I will need to locate it...

[bd82]

Seems like the max indice is 255.

• 3785ea9#diff-85d13249c2a81814737ca0e69085acfbR9

[tlrobinson]

That makes sense. Feel free to close this if that's the way forward.

[bd82]

That makes sense. Feel free to close this if that's the way forward.

Feel free to share/consult on your "macros" implementations particularly as there are no docs/examples for this yet.