protected StateMachineRewriter(
BoundStatement body,
MethodSymbol method,
SynthesizedContainer stateMachineType,
VariableSlotAllocator slotAllocatorOpt,
TypeCompilationState compilationState,
DiagnosticBag diagnostics)
{
Debug.Assert(body != null);
Debug.Assert(method != null);
Debug.Assert(stateMachineType != null);
Debug.Assert(compilationState != null);
Debug.Assert(diagnostics != null);
this.body = body;
this.method = method;
this.stateMachineType = stateMachineType;
this.slotAllocatorOpt = slotAllocatorOpt;
this.synthesizedLocalOrdinals = new SynthesizedLocalOrdinalsDispenser();
this.diagnostics = diagnostics;
this.F = new SyntheticBoundNodeFactory(method, body.Syntax, compilationState, diagnostics);
Debug.Assert(F.CurrentType == method.ContainingType);
Debug.Assert(F.Syntax == body.Syntax);
}
internal SynthesizedCapturedVariable(SynthesizedContainer container, Symbol captured, TypeSymbol type)
: base(container,
name: IsThis(captured) ? GeneratedNames.IteratorThisProxyName() : captured.Name,
isPublic: true,
isReadOnly: false,
isStatic: false)
{
// lifted fields do not need to have the CompilerGeneratedAttribute attached to it, the closure is already
// marked as being compiler generated.
this.type = type;
this.isThis = IsThis(captured);
}
internal SynthesizedCapturedVariable(SynthesizedContainer container, Symbol captured, TypeSymbol type)
: base(container,
name: IsThis(captured) ? GeneratedNames.IteratorThisProxyName() : captured.Name,
isPublic: true,
isReadOnly: false,
isStatic: false)
{
// lifted fields do not need to have the CompilerGeneratedAttribute attached to it, the closure is already
// marked as being compiler generated.
this.type = type;
this.isThis = IsThis(captured);
}
private LambdaCapturedVariable(SynthesizedContainer frame, TypeSymbol type, string fieldName, bool isThisParameter)
: base(frame,
fieldName,
isPublic: true,
isReadOnly: false,
isStatic: false)
{
Debug.Assert((object)type != null);
// lifted fields do not need to have the CompilerGeneratedAttribute attached to it, the closure is already
// marked as being compiler generated.
_type = type;
_isThis = isThisParameter;
}
private static TypeSymbol GetType(SynthesizedContainer frame, Symbol captured)
{
var local = captured as LocalSymbol;
if ((object)local != null)
{
// if we're capturing a generic frame pointer, construct it with the new frame's type parameters
var lambdaFrame = local.Type.OriginalDefinition as LambdaFrame;
if ((object)lambdaFrame != null)
{
return lambdaFrame.ConstructIfGeneric(frame.TypeArgumentsNoUseSiteDiagnostics);
}
}
return frame.TypeMap.SubstituteType((object)local != null ? local.Type : ((ParameterSymbol)captured).Type);
}
private static TypeSymbol GetCapturedVariableFieldType(SynthesizedContainer frame, Symbol variable)
{
var local = variable as LocalSymbol;
if ((object)local != null)
{
// if we're capturing a generic frame pointer, construct it with the new frame's type parameters
var lambdaFrame = local.Type.OriginalDefinition as LambdaFrame;
if ((object)lambdaFrame != null)
{
return lambdaFrame.ConstructIfGeneric(frame.TypeArgumentsNoUseSiteDiagnostics.SelectAsArray(TypeMap.TypeSymbolAsTypeWithModifiers));
}
}
return frame.TypeMap.SubstituteType((object)local != null ? local.Type : ((ParameterSymbol)variable).Type).Type;
}
protected StateMachineRewriter(
BoundStatement body,
MethodSymbol method,
SynthesizedContainer stateMachineClass,
TypeCompilationState compilationState,
DiagnosticBag diagnostics)
{
this.body = body;
this.method = method;
this.stateMachineClass = stateMachineClass;
this.compilationState = compilationState;
this.diagnostics = diagnostics;
this.F = new SyntheticBoundNodeFactory(method, body.Syntax, compilationState, diagnostics);
Debug.Assert(F.CurrentClass == method.ContainingType);
Debug.Assert(F.Syntax == body.Syntax);
}
private static TypeSymbol GetCapturedVariableFieldType(SynthesizedContainer frame, Symbol variable)
{
var local = variable as LocalSymbol;
if ((object)local != null)
{
// if we're capturing a generic frame pointer, construct it with the new frame's type parameters
var lambdaFrame = local.Type.OriginalDefinition as LambdaFrame;
if ((object)lambdaFrame != null)
{
// lambdaFrame may have less generic type parameters than frame, so trim them down (the first N will always match)
var typeArguments = frame.TypeArgumentsNoUseSiteDiagnostics;
if (typeArguments.Length > lambdaFrame.Arity)
{
typeArguments = ImmutableArray.Create(typeArguments, 0, lambdaFrame.Arity);
}
return lambdaFrame.ConstructIfGeneric(typeArguments.SelectAsArray(TypeMap.TypeSymbolAsTypeWithModifiers));
}
}
return frame.TypeMap.SubstituteType((object)local != null ? local.Type : ((ParameterSymbol)variable).Type).Type;
}
internal LambdaCapturedVariable(SynthesizedContainer frame, Symbol captured)
: base(frame, captured, GetType(frame, captured))
{
}
private static NamedTypeSymbol CreateCallSiteContainer(SyntheticBoundNodeFactory factory)
{
// TODO (tomat): consider - why do we need to include a method name at all? We could save some metadata bytes by not including it.
// Dev11 uses an empty string for explicit interface method implementation:
var containerName = GeneratedNames.MakeDynamicCallSiteContainerName(
factory.TopLevelMethod.IsExplicitInterfaceImplementation ? "" : factory.TopLevelMethod.Name, factory.CompilationState.GenerateTempNumber());
var synthesizedContainer = new SynthesizedContainer(factory.TopLevelMethod, containerName, TypeKind.Class);
factory.AddNestedType(synthesizedContainer);
if (factory.TopLevelMethod.IsGenericMethod)
{
return synthesizedContainer.Construct(factory.TopLevelMethod.TypeParameters.Cast<TypeParameterSymbol, TypeSymbol>());
}
return synthesizedContainer;
}