private object EvaluteIndexingExpression(IndexingExpression expression, VariableContext context)
{
object instance = Evaluate(expression.Operand, context);
int index = (int)Evaluate(expression.Indexer, context);
return(((object[])instance)[index]);
}
private void CheckIndexingExpression(IndexingExpression e, TypeCheckingContext context)
{
PerformTypeChecking(e.Operand, context);
PerformTypeChecking(e.Indexer, context);
if (!e.Operand.Type.IsArray)
{
context.ErrorProvider.ThrowException("Only array types can use [] operator.", e);
}
else if (!ReflectionSnippets.Accepts(typeof(int), e.Indexer.Type))
{
context.ErrorProvider.ThrowException("Indexer must be convertiable to int.", e);
}
else
{
e.Type = e.Operand.Type.GetElementType();
}
}
public virtual TReturn Visit(IndexingExpression node, TParam param) => throw new NotImplementedException();
public virtual TReturn Visit(IndexingExpression node, TParam param)
{
node.Array.Accept(this, param);
node.Index.Accept(this, param);
return(DefaultReturn);
}
