thing

thing.pegjs

start = exps:(expr+) {
	return exps.join('')
}
call = first:((func:function) / (identifier:id)) "(" exp:expr? ")" {
	return first + "(" + exp + ")"
}
id = chars:([a-zA-Z]+) {
	return chars.join('')
}
def = "#" identifier:id {
	return 'var ' + identifier + ';'
}
digit =
    [0-9]

int = val:([1-9] digit*/"0") {
    return parseInt([val[0]].concat(val[1]).join(""));
}
function = "<" exps:(expr+) ">" {
	return "(function(){"+exps+";})"
} / "<>" {
	return "(function(){})"
}
arg = "$" exp:expr {
	return "this.v["+exp+"]"
}
expr = int / arg / function / call / id / def