#1049: add back some decompiler settings

ICSharpCode.Decompiler/CSharp/StatementBuilder.cs

@@ -402,6 +402,10 @@ namespace ICSharpCode.Decompiler.CSharp
 
 		Statement TransformToForeach(UsingInstruction inst, out Expression resource)
 		{
+			if (!settings.ForEachStatement) {
+				resource = null;
+				return null;
+			}
 			// Check if the using resource matches the GetEnumerator pattern.
 			resource = exprBuilder.Translate(inst.ResourceExpression);
 			var m = getEnumeratorPattern.Match(resource);

ICSharpCode.Decompiler/CSharp/Transforms/PatternStatementTransform.cs

@@ -236,6 +236,7 @@ namespace ICSharpCode.Decompiler.CSharp.Transforms
 
 		Statement TransformForeachOnArray(ForStatement forStatement)
 		{
+			if (!context.Settings.ForEachStatement) return null;
 			Match m = forOnArrayPattern.Match(forStatement);
 			if (!m.Success) return null;
 			var itemVariable = m.Get<IdentifierExpression>("itemVariable").Single().GetILVariable();
@@ -363,6 +364,7 @@ namespace ICSharpCode.Decompiler.CSharp.Transforms
 
 		Statement TransformForeachOnMultiDimArray(ExpressionStatement expressionStatement)
 		{
+			if (!context.Settings.ForEachStatement) return null;
 			Match m;
 			Statement stmt = expressionStatement;
 			IL.ILVariable collection = null;

ICSharpCode.Decompiler/IL/Transforms/TransformCollectionAndObjectInitializers.cs

@@ -33,6 +33,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 
 		void IStatementTransform.Run(Block block, int pos, StatementTransformContext context)
 		{
+			if (!context.Settings.ObjectOrCollectionInitializers) return;
 			this.context = context;
 			try {
 				DoTransform(block, pos);

ICSharpCode.Decompiler/IL/Transforms/TransformExpressionTrees.cs

@@ -99,6 +99,7 @@ namespace ICSharpCode.Decompiler.IL.Transforms
 
 		public void Run(Block block, int pos, StatementTransformContext context)
 		{
+			if (!context.Settings.ExpressionTrees) return;
 			this.context = context;
 			this.conversions = CSharpConversions.Get(context.TypeSystem.Compilation);
 			this.resolver = new CSharpResolver(context.TypeSystem.Compilation);