fix scope warnings, fix #196

Author: WebFreak001

src/containers/hashmap.d

@@ -242,9 +242,9 @@ struct HashMap(K, V, Allocator = Mallocator, alias hashFunction = generateHash!K
 	/**
 	 * Returns: a range of the keys in this map.
 	 */
-	auto byKey(this This)() inout @trusted
+	auto byKey(this This)() inout @safe return scope
 	{
-		return MapRange!(This, IterType.key)(cast(Unqual!(This)*) &this);
+		return MapRange!(This, IterType.key)((() @trusted => cast(Unqual!(This)*) &this)());
 	}
 
 	/**
@@ -271,9 +271,9 @@ struct HashMap(K, V, Allocator = Mallocator, alias hashFunction = generateHash!K
 	/**
 	 * Returns: a range of the values in this map.
 	 */
-	auto byValue(this This)() inout @trusted
+	auto byValue(this This)() inout @safe return scope
 	{
-		return MapRange!(This, IterType.value)(cast(Unqual!(This)*) &this);
+		return MapRange!(This, IterType.value)((() @trusted => cast(Unqual!(This)*) &this)());
 	}
 
 	/// ditto
@@ -303,9 +303,9 @@ struct HashMap(K, V, Allocator = Mallocator, alias hashFunction = generateHash!K
 	 * Returns: a range of the kev/value pairs in this map. The element type of
 	 *     this range is a struct with `key` and `value` fields.
 	 */
-	auto byKeyValue(this This)() inout @trusted
+	auto byKeyValue(this This)() inout @safe return scope
 	{
-		return MapRange!(This, IterType.both)(cast(Unqual!(This)*) &this);
+		return MapRange!(This, IterType.both)((() @trusted => cast(Unqual!(This)*) &this)());
 	}
 
 	/**
@@ -431,7 +431,7 @@ private:
 
 	private:
 
-		this(Unqual!(MapType)* hm)
+		this(Unqual!(MapType)* hm) @safe
 		{
 			this.hm = hm;
 			this.bucketIndex = 0;
@@ -665,7 +665,7 @@ version(emsi_containers_unittest) unittest
 
 	void someFunc(const scope ref HashMap!(string,Foo) map) @safe
 	{
-		foreach (kv; map.byKeyValue())
+		foreach (scope kv; map.byKeyValue())
 		{
 			assert (kv.key == "foo");
 			assert (kv.value.name == "Foo");

src/containers/ttree.d

@@ -899,7 +899,7 @@ private:
 			return r;
 		}
 
-		void rotateLeft(ref Node* root, AllocatorType allocator) @safe
+		void rotateLeft(ref Node* root, AllocatorType allocator) @trusted
 		{
 			Node* newRoot;
 			if (right.left !is null && right.right is null)
@@ -927,7 +927,7 @@ private:
 			cleanup(newRoot, root, allocator);
 		}
 
-		void rotateRight(ref Node* root, AllocatorType allocator) @safe
+		void rotateRight(ref Node* root, AllocatorType allocator) @trusted
 		{
 			Node* newRoot;
 			if (left.right !is null && left.left is null)
@@ -959,10 +959,12 @@ private:
 		{
 			if (newRoot.parent !is null)
 			{
-				if (newRoot.parent.right is &this)
-					newRoot.parent.right = newRoot;
-				else
-					newRoot.parent.left = newRoot;
+				(() @trusted {
+					if (newRoot.parent.right is &this)
+						newRoot.parent.right = newRoot;
+					else
+						newRoot.parent.left = newRoot;
+				})();
 			}
 			else
 				root = newRoot;