private static (bool preCheck, ExpressionSyntax result) TryRewriteSimple(RewriteDesign design, string[] names)
{
if (design.CurrentCollection?.CollectionType == CollectionType.IEnumerable)
{
return(false, null);
}
if (names.Any(x => MethodsModifyingEnumeration.Contains(x)))
{
return(false, null);
}
if (design.Data.CurrentMethodParams.Any(x => x.Modifiers.Any()))
{
return(false, null);
}
if (!MethodsCreateArray.Contains(names.First()))
{
RewriteCollectionEnumeration.Rewrite(design, Array.Empty <RewrittenValueBridge>(), false);
}
for (var i = 0; i < names.Length; i++)
{
ExpressionSyntax rewrittenPart = RewriteSimplePart(names[i], design, i);
if (design.Error)
{
return(true, null);
}
if (!design.SimpleEnumeration)
{
return(true, null);
}
if (rewrittenPart != null)
{
return(true, rewrittenPart);
}
}
if (!MethodsWithResult.Contains(names.Last()))
{
ExpressionSyntax rewrittenPart = RewriteToArray.SimpleRewrite(design, Array.Empty <RewrittenValueBridge>());
if (!design.SimpleEnumeration)
{
return(true, null);
}
if (rewrittenPart != null)
{
return(true, rewrittenPart);
}
}
return(true, null);
}
private static ExpressionSyntax RewriteSimplePart(string last, RewriteDesign design, int i)
{
var args = design.RewriteChain[i].Arguments;
switch (last)
{
case "Aggregate": return(RewriteAggregate.SimpleRewrite(design, args));
case "All": return(RewriteAll.SimpleRewrite(design, args));
case "Any": return(RewriteAny.SimpleRewrite(design, args));
case "Average": return(RewriteAverage.SimpleRewrite(design, args));
case "Sum": return(RewriteSum.SimpleRewrite(design, args));
case "Count": return(RewriteCount.SimpleRewrite(design, args));
case "LongCount": return(RewriteLongCount.SimpleRewrite(design, args));
case "First": return(RewriteFirst.SimpleRewrite(design, args));
case "FirstOrDefault": return(RewriteFirstOrDefault.SimpleRewrite(design, args));
case "Last": return(RewriteLast.SimpleRewrite(design, args));
case "LastOrDefault": return(RewriteLastOrDefault.SimpleRewrite(design, args));
case "Single": return(RewriteSingle.SimpleRewrite(design, args));
case "SingleOrDefault": return(RewriteSingleOrDefault.SimpleRewrite(design, args));
case "ElementAt": return(RewriteElementAt.SimpleRewrite(design, args));
case "ElementAtOrDefault": return(RewriteElementAtOrDefault.SimpleRewrite(design, args));
case "Range": RewriteRange.Rewrite(design, args); return(null);
case "Repeat": RewriteRepeat.Rewrite(design, args); return(null);
case "Empty": RewriteEmpty.Rewrite(design, args, design.RewriteChain[i].Invocation); return(null);
case "Skip": RewriteSkip.Rewrite(design, args); return(null);
case "Take": RewriteTake.Rewrite(design, args); return(null);
case "Reverse": RewriteReverse.Rewrite(design, args); return(null);
case "Select": RewriteSelect.Rewrite(design, args); return(null);
case "Cast": RewriteCast.Rewrite(design, args, design.RewriteChain[i].Invocation); return(null);
case "ToArray": return(RewriteToArray.SimpleRewrite(design, args));
case "ToList": return(RewriteToList.SimpleRewrite(design, args));
case "ToSimpleList": return(RewriteToSimpleList.SimpleRewrite(design, args));
case "Unchecked": design.Unchecked = true; return(null);
default: return(null);
}
}