public static EXPR Map(this EXPR expr, ExprFactory factory, Func <EXPR, EXPR> f)
{
Debug.Assert(f != null);
Debug.Assert(factory != null);
if (expr == null)
{
return(f(expr));
}
EXPR result = null;
EXPR tail = null;
foreach (EXPR item in expr.ToEnumerable())
{
EXPR mappedItem = f(item);
factory.AppendItemToList(mappedItem, ref result, ref tail);
}
return(result);
}
internal CType chooseArrayIndexType(EXPR args)
{
// first, select the allowable types
for (int ipt = 0; ipt < s_rgptIntOp.Length; ipt++)
{
CType type = GetReqPDT(s_rgptIntOp[ipt]);
foreach (EXPR arg in args.ToEnumerable())
{
if (!canConvert(arg, type))
{
goto NEXTI;
}
}
return type;
NEXTI:
;
}
return null;
}