private void CreateInitialProxies(MultiDictionary <Symbol, CSharpSyntaxNode> captured)
{
var typeMap = stateMachineClass.TypeMap;
var orderedCaptured =
from local in captured.Keys
orderby local.Name, (local.Locations.Length == 0) ? 0 : local.Locations[0].SourceSpan.Start
select local;
foreach (var sym in orderedCaptured)
{
var local = sym as LocalSymbol;
if ((object)local != null &&
(local.SynthesizedLocalKind == SynthesizedLocalKind.None ||
local.SynthesizedLocalKind == SynthesizedLocalKind.LambdaDisplayClass))
{
// create proxies for user-defined variables and for lambda closures:
Debug.Assert(local.RefKind == RefKind.None);
MakeInitialProxy(typeMap, captured, local);
continue;
}
var parameter = sym as ParameterSymbol;
if ((object)parameter != null)
{
if (parameter.IsThis)
{
var proxyField = F.StateMachineField(method.ContainingType, GeneratedNames.ThisProxyName(), isPublic: true);
variableProxies.Add(parameter, new CapturedToFrameSymbolReplacement(proxyField));
if (PreserveInitialParameterValues)
{
var initialThis = method.ContainingType.IsStructType() ?
F.StateMachineField(method.ContainingType, GeneratedNames.StateMachineThisParameterProxyName(), isPublic: true) : proxyField;
initialParameters.Add(parameter, new CapturedToFrameSymbolReplacement(initialThis));
}
}
else
{
var proxyField = F.StateMachineField(typeMap.SubstituteType(parameter.Type), parameter.Name, isPublic: true);
variableProxies.Add(parameter, new CapturedToFrameSymbolReplacement(proxyField));
if (PreserveInitialParameterValues)
{
string proxyName = GeneratedNames.StateMachineParameterProxyName(parameter.Name);
initialParameters.Add(parameter, new CapturedToFrameSymbolReplacement(
F.StateMachineField(typeMap.SubstituteType(parameter.Type), proxyName, isPublic: true)));
}
if (parameter.Type.IsRestrictedType())
{
// CS4013: Instance of type '{0}' cannot be used inside an anonymous function, query expression, iterator block or async method
diagnostics.Add(ErrorCode.ERR_SpecialByRefInLambda, parameter.Locations[0], parameter.Type);
}
}
}
}
}