protected object AssignIndexer(AssignmentExpression node, object value)
{
var exp = (IndexExpression)node.Left;
var obj = exp.Target.Accept(this);
if (obj == null)
{
ExecutionException.ThrowNullError(exp.Target, node);
}
var args = exp.Arguments.Map(arg => arg.Accept(this)).AddLast(value);
if (exp.Setter is null)
{
var indexer = exp.Target.Type
.FindSetIndexer(args, out ArgumentConversions conversions);
if (indexer is null)
{
ExecutionException.ThrowMissingIndexer(exp.Target.Type, "set", exp.Target, node);
}
exp.Conversions = conversions;
exp.Setter = indexer;
// ok to be node.Right.Type instead of indexer.GetParameters().Last().ParameterType
var valueBind = conversions[args.Length - 1];
node.Type = (valueBind == null) ? node.Right.Type : valueBind.Type;
}
exp.Conversions.Invoke(ref args);
SafeInvoke(exp, exp.Setter, obj, args);
return(value);
}
static void ResolveIndexer(IndexExpression node, object[] args)
{
System.Reflection.MethodInfo indexer;
var type = node.Target.Type;
indexer = type
.FindGetIndexer(args, out ArgumentConversions conversions);
if (indexer is null)
{
ExecutionException.ThrowMissingIndexer(type, "get", node);
}
node.Type = indexer.ReturnType;
node.Conversions = conversions;
node.Getter = indexer;
}