public void TestPush()
{
int value = Generator.GetInt32();
var stack = ImmutableTreeStack.Create <int>();
Assert.Empty(stack);
// Push doesn't change the original stack
stack.Push(value);
Assert.Empty(stack);
stack = stack.Push(value);
Assert.Single(stack);
Assert.Equal(value, stack.Peek());
int[] expected = { value };
int[] actual = stack.ToArray();
Assert.Equal(expected, actual);
// Test through the IImmutableStack<T> interface
IImmutableStack <int> immutableStack = stack;
immutableStack.Push(Generator.GetInt32());
Assert.Equal(expected, immutableStack);
int nextValue = Generator.GetInt32();
immutableStack = immutableStack.Push(nextValue);
Assert.Equal(new[] { nextValue, value }, immutableStack);
}
static IImmutableStack <T> GetNextElementInHierarchyCore <T>(IImmutableStack <T> rootStack, Func <T, IList <T> > getChildren, Func <IList <T>, T, int> indedOf, bool skipChildren) where T : class
{
var currentElement = rootStack.Peek();
var children = getChildren(currentElement);
if (!skipChildren && children.Any())
{
return(rootStack.Push(children.First()));
}
var parents = rootStack.Pop();
var parent = parents.FirstOrDefault();
if (parent == null)
{
return(rootStack);
}
var neighbors = getChildren(parent);
var index = indedOf(neighbors, currentElement);
if (index < neighbors.Count - 1)
{
return(parents.Push(neighbors[index + 1]));
}
return(GetNextElementInHierarchyCore(parents, getChildren, indedOf, skipChildren: true));
}
/// <summary>
/// A test for Empty
/// </summary>
/// <typeparam name="T">The type of elements held in the stack.</typeparam>
private void EmptyTestHelper <T>() where T : new()
{
IImmutableStack <T> actual = ImmutableStack <T> .Empty;
Assert.NotNull(actual);
Assert.True(actual.IsEmpty);
AssertAreSame(ImmutableStack <T> .Empty, actual.Clear());
AssertAreSame(ImmutableStack <T> .Empty, actual.Push(new T()).Clear());
}
internal sealed override HarshProvisionerContextBase PushStateCore(Object state)
{
if (state == null)
{
throw Logger.Fatal.ArgumentNull(nameof(state));
}
return(this.With(c => c._stateStack, _stateStack.Push(state)));
}
private static IImmutableStack <object> GetLogicalOperationStack()
{
IImmutableStack <object> empty = (IImmutableStack <object>)CallContext.LogicalGetData(LogicalOperation.CallContextDataSlotName);
if (empty == null)
{
empty = ImmutableLogicalOperationStack <object> .Empty;
if (LogicalOperation.IsRunningInAdapter)
{
empty = empty.Push(new object());
}
LogicalOperation.UpdateImmutableStack(empty);
}
return(empty);
}
private DocumentNode CreateDelegationQuery(
OperationType operation,
IImmutableStack <SelectionPathComponent> path,
FieldNode requestedField)
{
if (!path.Any())
{
path = path.Push(new SelectionPathComponent(
requestedField.Name,
Array.Empty <ArgumentNode>()));
}
FieldNode current = CreateRequestedField(requestedField, ref path);
while (path.Any())
{
path = path.Pop(out SelectionPathComponent component);
current = CreateSelection(current, component);
}
var usedVariables = new HashSet <string>();
_usedVariables.CollectUsedVariables(current, usedVariables);
_usedVariables.CollectUsedVariables(_fragments, usedVariables);
var definitions = new List <IDefinitionNode>();
definitions.Add(CreateOperation(
_operationName,
operation,
new List <FieldNode> {
current
},
_variables.Where(t =>
usedVariables.Contains(t.Variable.Name.Value))
.ToList()));
definitions.AddRange(_fragments);
return(new DocumentNode(null, definitions));
}
public static IImmutableStack <T> push <T>(IImmutableStack <T> stack, T value) => stack.Push(value);
public IImmutableQueue <T> Enqueue(T value)
{
return(new ImmutableQueue <T>(forwards, backwards.Push(value)));
}
public ParserContext AddVariable(ParameterExpression variable)
{
return(new ParserContext(ExpectedType, TypeResolver, nameTable.Add(variable.Name, variable), variables.Push(variable)));
}
public GameState Do(Covers covers)
{
var moves = _moves.Push(covers);
return(new GameState(moves, CursorPosition));
}
public IImmutableStack <Step> AddStep <TStep>(IImmutableStack <Step> steps, TStep step, IGremlinQueryEnvironment environment) where TStep : Step
{
return(TryGetAddHandler(typeof(TStep), step.GetType()) is Func <IImmutableStack <Step>, TStep, IGremlinQueryEnvironment, IAddStepHandler, IImmutableStack <Step> > del
? del(steps, step, environment, this)
: steps.Push(step));
}
public override IImmutableStack <Step> AddStep <TStep>(IImmutableStack <Step> steps, TStep step, IGremlinQueryEnvironment environment) => steps.Push(step);