ImmutableList<T> group = groups.get(groupNumber);
      for (int itemNumber = 0; itemNumber < group.size(); itemNumber++) {
        // check related items in same group
        for (int relatedItemNumber = 0; relatedItemNumber < group.size(); relatedItemNumber++) {
          if (itemNumber != relatedItemNumber) {
            assertRelated(groupNumber, itemNumber, relatedItemNumber);
          }
        }

		tLeft,
		mkItem(itemNumber, "1"),
		tSpace,
		mkItem(itemNumber, "02"),
		tSpace,
		mkItem(itemNumber, "0x14"),
		tSpace,
		mkItem(itemNumber, "0X14"),
		tSpace,
		mkItem(itemNumber, "-7.2i"),
		tSpace,
		mkItem(itemNumber, "1e3"),
		tSpace,
		mkItem(itemNumber, "1E3"),
		tSpace,
		mkItem(itemNumber, "+1.2e-4"),
		tSpace,
		mkItem(itemNumber, "4.2i"),

      ImmutableList<T> group = groups.get(groupNumber);
      for (int itemNumber = 0; itemNumber < group.size(); itemNumber++) {
        // check related items in same group
        for (int relatedItemNumber = 0; relatedItemNumber < group.size(); relatedItemNumber++) {
          if (itemNumber != relatedItemNumber) {
            assertRelated(groupNumber, itemNumber, relatedItemNumber);
          }
        }

	itemEOF
	itemField      // alphanumeric identifier starting with '.'
	itemIdentifier // alphanumeric identifier not starting with '.'
	itemLeftDelim  // left action delimiter
	itemLeftParen  // '(' inside action
	itemNumber     // simple number, including imaginary
	itemPipe       // pipe symbol
	itemRawString  // raw quoted string (includes quotes)
	itemRightDelim // right action delimiter
	itemRightParen // ')' inside action

		case end:
			// At this point, the pipeline is complete
			t.checkPipeline(pipe, context)
			return
		case itemBool, itemCharConstant, itemComplex, itemDot, itemField, itemIdentifier,
			itemNumber, itemNil, itemRawString, itemString, itemVariable, itemLeftParen:
			t.backup()
			pipe.append(t.command())
		default:
			t.unexpected(token, context)
		}
	}
}

        new EqualsTester(
            new ItemReporter() {
              @Override
              String reportItem(Item<?> item) {
                List<Object> factoryArgs = argGroups.get(item.groupNumber).get(item.itemNumber);
                return factory.getName()
                    + "("
                    + Joiner.on(", ").useForNull("null").join(factoryArgs)
                    + ")";
              }
            });

        new EqualsTester(
            new ItemReporter() {
              @Override
              String reportItem(Item<?> item) {
                List<Object> factoryArgs = argGroups.get(item.groupNumber).get(item.itemNumber);
                return factory.getName()
                    + "("
                    + Joiner.on(", ").useForNull("null").join(factoryArgs)
                    + ")";
              }
            });

func TestNumberParse(t *testing.T) {
	for _, test := range numberTests {
		// If fmt.Sscan thinks it's complex, it's complex. We can't trust the output
		// because imaginary comes out as a number.
		var c complex128
		typ := itemNumber
		var tree *Tree
		if test.text[0] == '\'' {
			typ = itemCharConstant
		} else {
			_, err := fmt.Sscan(test.text, &c)
			if err == nil {
				typ = itemComplex
			}
		}