gistfile1.txt

\* PEG js grammar for graphite functions *\


start = EXPRS

TARGET = target:[^\(\), ]+ { 
    return {
        'type': 'target',
        'data': target.join(''),
        'children': null
    }
}

FUNCTION = name:FUNCTION_NAME '(' args:EXPRS ')' { 
    return {
        'type': 'function', 
        'data': name,
        'children': args
    }
}

EXPRS = 
    expr:EXPR ',' exprs:EXPRS { return [expr].concat(exprs) } / 
    expr:EXPR { return expr }

EXPR = func:FUNCTION { return func } / target:TARGET { return target }

FUNCTION_NAME = func_name:[A-Za-z]+
    { return func_name.join('') }