private BoundExpression RewriteIntPtrConversion(
BoundConversion oldNode,
SyntaxNode syntax,
BoundExpression rewrittenOperand,
Conversion conversion,
bool @checked,
bool explicitCastInCode,
ConstantValue constantValueOpt,
TypeSymbol rewrittenType)
{
Debug.Assert(rewrittenOperand != null);
Debug.Assert((object)rewrittenType != null);
TypeSymbol source = rewrittenOperand.Type;
TypeSymbol target = rewrittenType;
SpecialMember member = GetIntPtrConversionMethod(source: rewrittenOperand.Type, target: rewrittenType);
MethodSymbol method = GetSpecialTypeMethod(syntax, member);
Debug.Assert(!method.ReturnsVoid);
Debug.Assert(method.ParameterCount == 1);
conversion = conversion.SetConversionMethod(method);
if (source.IsNullableType() && target.IsNullableType())
{
Debug.Assert(target.IsNullableType());
return RewriteLiftedUserDefinedConversion(syntax, rewrittenOperand, conversion, rewrittenType);
}
else if (source.IsNullableType())
{
rewrittenOperand = MakeConversionNode(rewrittenOperand, source.StrippedType(), @checked);
}
rewrittenOperand = MakeConversionNode(rewrittenOperand, method.ParameterTypes[0], @checked);
var returnType = method.ReturnType;
Debug.Assert((object)returnType != null);
if (_inExpressionLambda)
{
return BoundConversion.Synthesized(syntax, rewrittenOperand, conversion, @checked, explicitCastInCode, constantValueOpt, rewrittenType);
}
var rewrittenCall = MakeCall(
syntax: syntax,
rewrittenReceiver: null,
method: method,
rewrittenArguments: ImmutableArray.Create(rewrittenOperand),
type: returnType);
return MakeConversionNode(rewrittenCall, rewrittenType, @checked);
}