internal string ExpandString(IEnumerable <object> expandedValues)
{
expandedValues = expandedValues.Reverse();
var exValEnumerator = expandedValues.GetEnumerator();
var resultStr = new StringBuilder();
string rest = Value;
// we expand this string in reversed order so we don't need to adjust start indexes
foreach (var item in NestedExpressions.Reverse())
{
if (!exValEnumerator.MoveNext())
{
break;
}
// first find the relative position of the expandable part inside our string
string value = LanguagePrimitives.ConvertTo <string>(exValEnumerator.Current);
var relStart = item.Extent.StartOffset - Extent.StartOffset - 1;
var relEnd = item.Extent.EndOffset - Extent.StartOffset - 1;
// the end are constant words between this expression and the last resolved expression
// we need to resolve escape constants before adding it
var resolvedEnd = StringExpressionHelper.ResolveEscapeCharacters(rest.Substring(relEnd), StringConstantType);
// as we do it in reverse order: insert at the beginning, in reverse order
resultStr.Insert(0, resolvedEnd).Insert(0, value);
// finally strip the rest which needs to be expanded
rest = rest.Substring(0, relStart);
}
// now insert the rest at the beginning (other constant string)
resultStr.Insert(0, StringExpressionHelper.ResolveEscapeCharacters(rest, StringConstantType));
return(resultStr.ToString());
}
