public override BoundNode VisitPointerElementAccess(BoundPointerElementAccess node)
{
BoundExpression rewrittenExpression = LowerReceiverOfPointerElementAccess(node.Expression);
BoundExpression rewrittenIndex = VisitExpression(node.Index);
return(RewritePointerElementAccess(node, rewrittenExpression, rewrittenIndex));
}
private BoundExpression RewritePointerElementAccess(BoundPointerElementAccess node, BoundExpression rewrittenExpression, BoundExpression rewrittenIndex)
{
// Optimization: p[0] == *p
if (rewrittenIndex.IsDefaultValue())
{
return(new BoundPointerIndirectionOperator(
node.Syntax,
rewrittenExpression,
node.Type));
}
BinaryOperatorKind additionKind = BinaryOperatorKind.Addition;
switch (rewrittenIndex.Type.SpecialType)
{
case SpecialType.System_Int32:
additionKind |= BinaryOperatorKind.PointerAndInt32Addition;
break;
case SpecialType.System_UInt32:
additionKind |= BinaryOperatorKind.PointerAndUInt32Addition;
break;
case SpecialType.System_Int64:
additionKind |= BinaryOperatorKind.PointerAndInt64Addition;
break;
case SpecialType.System_UInt64:
additionKind |= BinaryOperatorKind.PointerAndUInt64Addition;
break;
default:
throw ExceptionUtilities.UnexpectedValue(rewrittenIndex.Type.SpecialType);
}
if (node.Checked)
{
additionKind |= BinaryOperatorKind.Checked;
}
return(new BoundPointerIndirectionOperator(
node.Syntax,
MakeBinaryOperator(
node.Syntax,
additionKind,
rewrittenExpression,
rewrittenIndex,
rewrittenExpression.Type,
method: null,
isPointerElementAccess: true), //see RewriterPointerNumericOperator
node.Type));
}
public override BoundNode VisitPointerElementAccess(BoundPointerElementAccess node)
{
BoundSpillSequenceBuilder builder = null;
var index = VisitExpression(ref builder, node.Index);
BoundExpression expression;
if (builder == null)
{
expression = VisitExpression(ref builder, node.Expression);
}
else
{
var expressionBuilder = new BoundSpillSequenceBuilder();
expression = VisitExpression(ref expressionBuilder, node.Expression);
expression = Spill(expressionBuilder, expression);
expressionBuilder.Include(builder);
builder = expressionBuilder;
}
return(UpdateExpression(builder, node.Update(expression, index, node.Checked, node.Type)));
}
public override BoundNode VisitPointerElementAccess(BoundPointerElementAccess node)
{
NoteUnsafe(node);
return(base.VisitPointerElementAccess(node));
}
private static BoundExpression VisitPointerElementAccess(BoundPointerElementAccess node)
{
// error should have been reported earlier
// Diagnostics.Add(ErrorCode.ERR_ExpressionTreeContainsPointerOp, node.Syntax.Location);
return(new BoundBadExpression(node.Syntax, default(LookupResultKind), ImmutableArray <Symbol> .Empty, ImmutableArray.Create <BoundExpression>(node), node.Type));
}
