public override BoundNode VisitScope(BoundScope node)
{
Debug.Assert(!node.Locals.IsEmpty);
var newLocals = ArrayBuilder <LocalSymbol> .GetInstance();
var hoistedLocalsWithDebugScopes = ArrayBuilder <StateMachineFieldSymbol> .GetInstance();
foreach (var local in node.Locals)
{
Debug.Assert(local.SynthesizedKind == SynthesizedLocalKind.UserDefined &&
local.ScopeDesignatorOpt?.Kind() == SyntaxKind.SwitchSection);
if (!NeedsProxy(local))
{
newLocals.Add(local);
continue;
}
hoistedLocalsWithDebugScopes.Add(((CapturedToStateMachineFieldReplacement)proxies[local]).HoistedField);
}
var statements = VisitList(node.Statements);
// wrap the node in an iterator scope for debugging
if (hoistedLocalsWithDebugScopes.Count != 0)
{
BoundStatement translated;
if (newLocals.Count == 0)
{
newLocals.Free();
translated = new BoundStatementList(node.Syntax, statements);
}
else
{
translated = node.Update(newLocals.ToImmutableAndFree(), statements);
}
return(MakeStateMachineScope(hoistedLocalsWithDebugScopes.ToImmutable(), translated));
}
else
{
hoistedLocalsWithDebugScopes.Free();
newLocals.Free();
return(node.Update(node.Locals, statements));
}
}
public override BoundNode VisitScope(BoundScope node)
{
Debug.Assert(!node.Locals.IsEmpty);
var newLocalsBuilder = ArrayBuilder <LocalSymbol> .GetInstance();
var hoistedLocalsWithDebugScopes = ArrayBuilder <StateMachineFieldSymbol> .GetInstance();
bool localsRewritten = false;
foreach (var local in node.Locals)
{
// BoundScope is only used for switch
Debug.Assert(local.SynthesizedKind == SynthesizedLocalKind.UserDefined &&
(local.ScopeDesignatorOpt?.Kind() == SyntaxKind.SwitchSection ||
local.ScopeDesignatorOpt?.Kind() == SyntaxKind.SwitchExpressionArm));
LocalSymbol localToUse;
if (TryRewriteLocal(local, out localToUse))
{
newLocalsBuilder.Add(localToUse);
localsRewritten |= ((object)local != localToUse);
continue;
}
hoistedLocalsWithDebugScopes.Add(((CapturedToStateMachineFieldReplacement)proxies[local]).HoistedField);
}
var statements = VisitList(node.Statements);
// wrap the node in an iterator scope for debugging
if (hoistedLocalsWithDebugScopes.Count != 0)
{
BoundStatement translated;
if (newLocalsBuilder.Count == 0)
{
newLocalsBuilder.Free();
translated = new BoundStatementList(node.Syntax, statements);
}
else
{
translated = node.Update(newLocalsBuilder.ToImmutableAndFree(), statements);
}
return(MakeStateMachineScope(hoistedLocalsWithDebugScopes.ToImmutable(), translated));
}
else
{
hoistedLocalsWithDebugScopes.Free();
ImmutableArray <LocalSymbol> newLocals;
if (localsRewritten)
{
newLocals = newLocalsBuilder.ToImmutableAndFree();
}
else
{
newLocalsBuilder.Free();
newLocals = node.Locals;
}
return(node.Update(newLocals, statements));
}
}
