Bala

Copperbox revision 150.

More work on the SymLilyPond parser.

Yesterdays example for parsing with attributes didn't work when I got round to testing it, chaining attributes with bind (>>=) forces them to be present when we want them to be optional:

pitchA = pPitch >>= pAccidental >>= pMicroTone >>= pOctaveSpec

The new revision uses an alternative to bind (##) that allows the parse to be optional:

pitchA = lexeme $ pPitch ## pAccidental ## pMicroTone ## pOctaveSpec

The parser currently falls down on concatenation - i.e. it cannot handle lists of notes inside a block. I suspect that I'll have to rework how concatenation is handled with in the final-tagless datatypes.