private FieldSymbol GetAwaiterField(TypeSymbol awaiterType)
{
FieldSymbol result;
// Awaiters of the same type always share the same slot, regardless of what await expressions they belong to.
// Even in case of nested await expressions only one awaiter is active.
// So we don't need to tie the awaiter variable to a particular await expression and only use its type
// to find the previous awaiter field.
if (!awaiterFields.TryGetValue(awaiterType, out result))
{
int slotIndex = -1;
if (slotAllocatorOpt != null)
{
slotIndex = slotAllocatorOpt.GetPreviousAwaiterSlotIndex((Cci.ITypeReference)awaiterType);
}
if (slotIndex == -1)
{
slotIndex = nextAwaiterId++;
}
string fieldName = GeneratedNames.AsyncAwaiterFieldName(slotIndex);
result = F.StateMachineField(awaiterType, fieldName, SynthesizedLocalKind.AwaiterField, slotIndex);
awaiterFields.Add(awaiterType, result);
}
return(result);
}
private FieldSymbol GetAwaiterField(TypeSymbol awaiterType)
{
FieldSymbol result;
if (!awaiterFields.TryGetValue(awaiterType, out result))
{
result = F.SynthesizeField(awaiterType, GeneratedNames.AsyncAwaiterFieldName(CompilationState.GenerateTempNumber()));
awaiterFields.Add(awaiterType, result);
}
return(result);
}
private FieldSymbol GetAwaiterField(TypeSymbol awaiterType)
{
FieldSymbol result;
// Awaiters of the same type always share the same slot, regardless of what await expressions they belong to.
// Even in case of nested await expressions only one awaiter is active.
// So we don't need to tie the awaiter variable to a particular await expression and only use its type
// to find the previous awaiter field.
if (!_awaiterFields.TryGetValue(awaiterType, out result))
{
int slotIndex;
if (
slotAllocatorOpt == null ||
!slotAllocatorOpt.TryGetPreviousAwaiterSlotIndex(
F.ModuleBuilderOpt.Translate(
awaiterType,
F.Syntax,
F.Diagnostics.DiagnosticBag
),
F.Diagnostics.DiagnosticBag,
out slotIndex
)
)
{
slotIndex = _nextAwaiterId++;
}
string fieldName = GeneratedNames.AsyncAwaiterFieldName(slotIndex);
result = F.StateMachineField(
awaiterType,
fieldName,
SynthesizedLocalKind.AwaiterField,
slotIndex
);
_awaiterFields.Add(awaiterType, result);
}
return(result);
}