public IteratorFinallyMethodSymbol(IteratorStateMachine stateMachineType, string name) { Debug.Assert((object)stateMachineType != null); Debug.Assert(name != null); _stateMachineType = stateMachineType; _name = name; }
private IteratorRewriter( BoundStatement body, MethodSymbol method, bool isEnumerable, IteratorStateMachine stateMachineType, VariableSlotAllocator slotAllocatorOpt, TypeCompilationState compilationState, DiagnosticBag diagnostics) : base(body, method, stateMachineType, slotAllocatorOpt, compilationState, diagnostics) { // the element type may contain method type parameters, which are now alpha-renamed into type parameters of the generated class _elementType = stateMachineType.ElementType; _isEnumerable = isEnumerable; }
/// <summary> /// Rewrite an iterator method into a state machine class. /// </summary> internal static BoundStatement Rewrite( BoundStatement body, MethodSymbol method, int methodOrdinal, VariableSlotAllocator slotAllocatorOpt, TypeCompilationState compilationState, DiagnosticBag diagnostics, out IteratorStateMachine stateMachineType) { TypeSymbol elementType = method.IteratorElementType; if ((object)elementType == null || method.IsAsync) { stateMachineType = null; return(body); } // Figure out what kind of iterator we are generating. bool isEnumerable; switch (method.ReturnType.TypeSymbol.OriginalDefinition.SpecialType) { case SpecialType.System_Collections_IEnumerable: case SpecialType.System_Collections_Generic_IEnumerable_T: isEnumerable = true; break; case SpecialType.System_Collections_IEnumerator: case SpecialType.System_Collections_Generic_IEnumerator_T: isEnumerable = false; break; default: throw ExceptionUtilities.UnexpectedValue(method.ReturnType.TypeSymbol.OriginalDefinition.SpecialType); } stateMachineType = new IteratorStateMachine(slotAllocatorOpt, compilationState, method, methodOrdinal, isEnumerable, elementType); compilationState.ModuleBuilderOpt.CompilationState.SetStateMachineType(method, stateMachineType); var rewriter = new IteratorRewriter(body, method, isEnumerable, stateMachineType, slotAllocatorOpt, compilationState, diagnostics); if (!rewriter.VerifyPresenceOfRequiredAPIs()) { return(body); } return(rewriter.Rewrite()); }