if tok == '\n' || tok == ';' || (nesting == 0 && (tok == ',' || tok == ':')) {
				if tok == ':' {
					// Remember this location so we can swap the operands below.
					if colon >= 0 {
						p.errorf("invalid ':' in operand")
						return word, cond, operands, true
					}
					colon = len(operands)
				}
				break
			}
			if tok == '(' || tok == '[' {
				nesting++
			}
			if tok == ')' || tok == ']' {