public static Expression <Func <SortedDictionary <TKey, TValue> > > CreateSortedDictionaryGenerator <TKey, TValue>(this IComparerExpression <TKey> comparerExp, QueryContainer container)
{
if (ComparerExpression <TKey> .IsSimpleDefault(comparerExp))
{
return(() => new SortedDictionary <TKey, TValue>());
}
var expr = comparerExp.GetCompareExpr();
if (container == null)
{
Expression <Func <Comparison <TKey>, SortedDictionary <TKey, TValue> > > template
= (c) => new SortedDictionary <TKey, TValue>(Comparer <TKey> .Create(c));
var replaced = template.ReplaceParametersInBody(expr);
return(Expression.Lambda <Func <SortedDictionary <TKey, TValue> > >(replaced));
}
var expression = expr.ToString();
var vars = VariableFinder.Find(expr).Select(o => o.GetHashCode());
var captures = vars.Aggregate(expression.GetHashCode(), (a, i) => a ^ i);
var key = Tuple.Create(expression + string.Concat(vars.Select(o => o.ToString(CultureInfo.InvariantCulture))), typeof(TKey), typeof(TValue));
Type temp;
lock (sentinel)
{
if (!DictionaryTypes.TryGetValue(key, out temp))
{
string typeName = Prefix
+ captures.ToString(CultureInfo.InvariantCulture)
+ typeof(TKey).ToString().GetHashCode().ToString(CultureInfo.InvariantCulture)
+ typeof(TValue).ToString().GetHashCode().ToString(CultureInfo.InvariantCulture);
typeName = typeName.Replace("-", "_");
var builderCode = new GeneratedSortedDictionary(typeName).TransformText();
var assemblyReferences = Transformer.AssemblyReferencesNeededFor(typeof(SortedDictionary <,>));
var a = Transformer.CompileSourceCode(builderCode, assemblyReferences, out string errorMessages);
temp = a.GetType(typeName + "`2");
temp = temp.MakeGenericType(typeof(TKey), typeof(TValue));
var init = temp.GetTypeInfo().GetMethod("Initialize", BindingFlags.Static | BindingFlags.Public);
init.Invoke(null, new object[] { Comparer <TKey> .Create(expr.Compile()) });
DictionaryTypes.Add(key, temp);
}
if (!container.TryGetSortedDictionaryType(key, out Type other))
{
container.RegisterSortedDictionaryType(key, temp);
}
}
return(Expression.Lambda <Func <SortedDictionary <TKey, TValue> > >(Expression.New(temp)));
}
