bool IDfirNodeVisitor <bool> .VisitIterateTunnel(IterateTunnel iterateTunnel)
{
Terminal iteratorInput = iterateTunnel.InputTerminals.ElementAt(0),
itemOutput = iterateTunnel.OutputTerminals.ElementAt(0);
LifetimeTypeVariableGroup lifetimeTypeVariableGroup = LifetimeTypeVariableGroup.CreateFromTerminal(iteratorInput);
TypeVariableReference loopLifetimeReference = _typeVariableSet.CreateReferenceToLifetimeType(itemOutput.GetDiagramLifetime());
TypeVariableReference itemTypeVariable = _typeVariableSet.CreateReferenceToNewTypeVariable();
TypeVariableReference implementsIteratorTypeVariable = _typeVariableSet.CreateReferenceToNewTypeVariable(
new Constraint[] { new IteratorTraitConstraint(itemTypeVariable) });
ReferenceInputTerminalLifetimeGroup group = CreateTerminalLifetimeGroup(InputReferenceMutability.RequireMutable, lifetimeTypeVariableGroup);
group.AddTerminalFacade(iteratorInput, implementsIteratorTypeVariable, default(TypeVariableReference));
_nodeFacade[itemOutput] = new SimpleTerminalFacade(itemOutput, itemTypeVariable);
TypeVariableReference intermediateTypeVariable = _typeVariableSet.CreateReferenceToOptionType(itemTypeVariable);
VariableReference intermediateVariable = iterateTunnel.GetVariableSet().CreateNewVariable(
iterateTunnel.ParentStructure.ParentDiagram.GetLifetimeGraphIdentifier().Id,
intermediateTypeVariable,
false);
intermediateVariable.Name = iterateTunnel.IntermediateValueName;
iterateTunnel.IntermediateValueVariable = intermediateVariable;
iterateTunnel.IteratorNextFunctionType = new FunctionType(
Signatures.IteratorNextType,
new TypeVariableReference[]
{
implementsIteratorTypeVariable,
itemTypeVariable,
group.LifetimeType
});
return(true);
}
bool IDfirNodeVisitor <bool> .VisitDecomposeTupleNode(DecomposeTupleNode decomposeTupleNode)
{
TypeVariableReference[] elementTypes = new TypeVariableReference[decomposeTupleNode.OutputTerminals.Count];
TypeVariableReference mutabilityType = default(TypeVariableReference);
ReferenceInputTerminalLifetimeGroup inputTerminalGroup = null;
if (decomposeTupleNode.DecomposeMode == DecomposeMode.Borrow)
{
mutabilityType = _typeVariableSet.CreateReferenceToMutabilityType();
var lifetimeVariableGroup = LifetimeTypeVariableGroup.CreateFromNode(decomposeTupleNode);
inputTerminalGroup = _nodeFacade.CreateInputLifetimeGroup(
InputReferenceMutability.Polymorphic,
lifetimeVariableGroup.LazyNewLifetime,
lifetimeVariableGroup.LifetimeType);
}
for (int i = 0; i < decomposeTupleNode.OutputTerminals.Count; ++i)
{
Terminal outputTerminal = decomposeTupleNode.OutputTerminals[i];
TypeVariableReference elementType = _typeVariableSet.CreateReferenceToNewTypeVariable();
TypeVariableReference outputTerminalType = decomposeTupleNode.DecomposeMode == DecomposeMode.Borrow
? _typeVariableSet.CreateReferenceToPolymorphicReferenceType(
mutabilityType,
elementType,
inputTerminalGroup.LifetimeType)
: elementType;
_nodeFacade[outputTerminal] = new SimpleTerminalFacade(outputTerminal, outputTerminalType);
elementTypes[i] = elementType;
}
TypeVariableReference tupleType = _typeVariableSet.CreateReferenceToTupleType(elementTypes);
Terminal inputTerminal = decomposeTupleNode.InputTerminals[0];
if (decomposeTupleNode.DecomposeMode == DecomposeMode.Borrow)
{
inputTerminalGroup.AddTerminalFacade(
inputTerminal,
tupleType,
mutabilityType);
}
else
{
_nodeFacade[inputTerminal] = new SimpleTerminalFacade(inputTerminal, tupleType);
}
return(true);
}
bool IDfirNodeVisitor <bool> .VisitStructFieldAccessorNode(StructFieldAccessorNode structFieldAccessorNode)
{
TypeVariableReference mutabilityType = _typeVariableSet.CreateReferenceToMutabilityType();
var lifetimeVariableGroup = LifetimeTypeVariableGroup.CreateFromNode(structFieldAccessorNode);
ReferenceInputTerminalLifetimeGroup inputTerminalGroup = CreateTerminalLifetimeGroup(
InputReferenceMutability.Polymorphic,
lifetimeVariableGroup);
var fieldTypes = new Dictionary <string, TypeVariableReference>();
foreach (var terminalPair in structFieldAccessorNode.OutputTerminals.Zip(structFieldAccessorNode.FieldNames))
{
string fieldName = terminalPair.Value;
TypeVariableReference fieldType;
if (string.IsNullOrEmpty(fieldName))
{
fieldType = _typeVariableSet.CreateReferenceToNewTypeVariable();
}
else if (!fieldTypes.TryGetValue(fieldName, out fieldType))
{
fieldType = _typeVariableSet.CreateReferenceToNewTypeVariable();
fieldTypes[fieldName] = fieldType;
}
TypeVariableReference terminalTypeVariable = _typeVariableSet.CreateReferenceToPolymorphicReferenceType(
mutabilityType,
fieldType,
inputTerminalGroup.LifetimeType);
Terminal outputTerminal = terminalPair.Key;
_nodeFacade[outputTerminal] = new SimpleTerminalFacade(outputTerminal, terminalTypeVariable);
}
TypeVariableReference fieldedType = _typeVariableSet.CreateReferenceToIndefiniteFieldedType(fieldTypes);
inputTerminalGroup.AddTerminalFacade(
structFieldAccessorNode.StructInputTerminal,
fieldedType,
mutabilityType);
return(true);
}