public override LocalDefinition GetPreviousLocal(
Cci.ITypeReference currentType,
ILocalSymbolInternal currentLocalSymbol,
string nameOpt,
SynthesizedLocalKind kind,
LocalDebugId id,
LocalVariableAttributes pdbAttributes,
LocalSlotConstraints constraints,
ImmutableArray <bool> dynamicTransformFlags,
ImmutableArray <string> tupleElementNames)
{
if (id.IsNone)
{
return(null);
}
LocalDebugId previousId;
if (!TryGetPreviousLocalId(currentLocalSymbol.GetDeclaratorSyntax(), id, out previousId))
{
return(null);
}
var previousType = _symbolMap.MapReference(currentType);
if (previousType == null)
{
return(null);
}
// TODO (bug #781309): Should report a warning if the type of the local has changed
// and the previous value will be dropped.
var localKey = new EncLocalInfo(new LocalSlotDebugInfo(kind, previousId), previousType, constraints, signature: null);
int slot;
if (!_previousLocalSlots.TryGetValue(localKey, out slot))
{
return(null);
}
return(new LocalDefinition(
currentLocalSymbol,
nameOpt,
currentType,
slot,
kind,
id,
pdbAttributes,
constraints,
dynamicTransformFlags,
tupleElementNames));
}
private static EncHoistedLocalInfo MapHoistedLocalSlot(EncHoistedLocalInfo info, SymbolMatcher map)
{
if (info.IsUnused)
{
return(info);
}
return(new EncHoistedLocalInfo(info.SlotInfo, map.MapReference(info.Type)));
}
private static EncLocalInfo MapLocalInfo(EncLocalInfo info, SymbolMatcher map)
{
Debug.Assert(!info.IsDefault);
if (info.IsUnused)
{
Debug.Assert(info.Signature != null);
return(info);
}
return(new EncLocalInfo(info.SlotInfo, map.MapReference(info.Type), info.Constraints, info.Signature));
}