* Returns an iterator over the merged contents of all given {@code iterators}, traversing every
   * element of the input iterators. Equivalent entries will not be de-duplicated.
   *
   * <p>Callers must ensure that the source {@code iterators} are in non-descending order as this
   * method does not sort its input.
   *
   * <p>For any equivalent elements across all {@code iterators}, it is undefined which element is
   * returned first.

   * Returns an iterator over the merged contents of all given {@code iterators}, traversing every
   * element of the input iterators. Equivalent entries will not be de-duplicated.
   *
   * <p>Callers must ensure that the source {@code iterators} are in non-descending order as this
   * method does not sort its input.
   *
   * <p>For any equivalent elements across all {@code iterators}, it is undefined which element is
   * returned first.

	spanPara
)

func parseSpans(lines []string) []span {
	var spans []span

	// The loop may process a line twice: once as unindented
	// and again forced indented. So the maximum expected
	// number of iterations is 2*len(lines). The repeating logic
	// can be subtle, though, and to protect against introduction
	// of infinite loops in future changes, we watch to see that
	// we are not looping too much. A panic is better than a

	done <- struct{}{}
	go func() {
		for i := 0; i < 2; i++ {
			_, open := <-ch
			if !open {
				return
			}
		}
		t.Error("expected closed channel after two iterations")
	}()
	<-complete

	if len(errc) != 0 {
		t.Fatal(<-errc)
	}
}

func Test_waitFor(t *testing.T) {
	var invocations int
	testCases := map[string]struct {
		F       ConditionFunc

// and all requested packages are in "all", then loading completes in a single
// iteration.
// TODO(bcmills): We should also be able to load in a single iteration if the
// requested packages all come from modules that are themselves tidy, regardless
// of whether those packages are in "all". Today, that requires two iterations
// if those packages are not found in existing dependencies of the main module.

import (
	"context"

 *  instant.doStuff == operation.doStuff.end
 * </pre>
 */
class Operations {
    private final InstantFactory instantFactory
    private final Object lock = new Object()
    private final Map<String, NamedOperation> operations = [:]
    private final OperationListener listener

    Operations(InstantFactory instantFactory, OperationListener listener) {
        this.listener = listener

  // tensor from A being computed and copied.
  //
  // To choose better maximal clusterings we make multiple iterations over the
  // graph in post-order, where each such iteration is called a "phase".

  // Phase 0: contract metadata operations with their producer.

  VLOG(4) << "Running phase 0";
  TF_RETURN_IF_ERROR(
      ForEachEdgeInPostOrder([&](Cluster* from,

		i <<= levelBits[l]

		// Slice out the block of entries we care about.
		entries := p.summary[l][i : i+entriesPerBlock]

		// Determine j0, the first index we should start iterating from.
		// The searchAddr may help us eliminate iterations if we followed the
		// searchAddr on the previous level or we're on the root level, in which
		// case the searchAddr should be the same as i after levelShift.
		j0 := 0

		if s.vars[i].name == name {
			s.vars[i].value = value
			return
		}
	}
	s.errorf("undefined variable: %s", name)
}

// setTopVar overwrites the top-nth variable on the stack. Used by range iterations.
func (s *state) setTopVar(n int, value reflect.Value) {
	s.vars[len(s.vars)-n].value = value
}

// varValue returns the value of the named variable.
func (s *state) varValue(name string) reflect.Value {

// explains why this choice was made.)
const chainedMutations = 5

// fuzz runs the test function on random variations of the input value in shared
// memory for a limited duration or number of iterations.
//
// fuzz returns early if it finds an input that crashes the fuzz function (with
// fuzzResponse.Err set) or an input that expands coverage (with
// fuzzResponse.InterestingDuration set).
//