Add capacity capabilities to the vector

source/tanya/async/event/epoll.d

@@ -48,7 +48,7 @@ class EpollLoop : SelectorLoop
 			throw MmapPool.instance.make!BadLoopException("epoll initialization failed");
 		}
 		super();
-		events = MmapPool.instance.makeArray!epoll_event(maxEvents);
+		MmapPool.instance.resizeArray(events, maxEvents);
 	}
 
 	/**

source/tanya/async/event/kqueue.d

@@ -165,8 +165,8 @@ class KqueueLoop : SelectorLoop
 		{
 			throw MmapPool.instance.make!BadLoopException("epoll initialization failed");
 		}
-		events = MmapPool.instance.makeArray!kevent_t(64);
+		MmapPool.instance.resizeArray(events, 64);
-		changes = MmapPool.instance.makeArray!kevent_t(64);
+		MmapPool.instance.resizeArray(changes, 64);
 	}
 
 	/**

source/tanya/async/event/selector.d

@@ -116,7 +116,7 @@ abstract class SelectorLoop : Loop
 	this() @nogc
 	{
 		super();
-		connections = MmapPool.instance.makeArray!ConnectionWatcher(maxEvents);
+		MmapPool.instance.resizeArray(connections, maxEvents);
 	}
 
 	~this() @nogc

source/tanya/container/vector.d

@@ -10,11 +10,23 @@
  */  
 module tanya.container.vector;
 
+import core.exception;
 import std.algorithm.comparison;
 import std.range.primitives;
 import std.traits;
 import tanya.memory;
 
+version (unittest)
+{
+	import tanya.traits;
+	struct TestA
+	{
+		~this() @nogc
+		{
+		}
+	}
+}
+
 /**
  * One dimensional array.
  *
@@ -26,11 +38,13 @@ template Vector(T)
 	/**
 	 * Defines the container's primary range.
 	 */
-	struct Range
+	struct Range(V)
 	{
-		private Vector* data;
+		private alias E = typeof(data.vector[0]);
 
-		private @property ref inout(Vector) outer() inout return
+		private V* data;
+
+		private @property ref inout(V) outer() inout return
 		{
 			return *data;
 		}
@@ -40,10 +54,15 @@ template Vector(T)
 		invariant
 		{
 			assert(start <= end);
-			assert(start == 0 || end > 0);
 		}
 
-		protected this(ref Vector data, in size_t a, in size_t b)
+		private this(ref inout V data, in size_t a, in size_t b) inout
+		in
+		{
+			assert(a <= b);
+			assert(b <= data.length);
+		}
+		body
 		{
 			this.data = &data;
 			start = a;
@@ -67,22 +86,12 @@ template Vector(T)
 
 		alias opDollar = length;
 
-		@property ref inout(T) front() inout
+		@property ref inout(E) front() inout
-		in
-		{
-			assert(!empty);
-		}
-		body
 		{
 			return outer[start];
 		}
 
-		@property ref inout(T) back() inout
+		@property ref inout(E) back() inout
-		in
-		{
-			assert(!empty);
-		}
-		body
 		{
 			return outer[end - 1];
 		}
@@ -107,12 +116,7 @@ template Vector(T)
 			--end;
 		}
 
-		ref inout(T) opIndex(in size_t i) inout
+		ref inout(E) opIndex(in size_t i) inout
-		in
-		{
-			assert(start + i < end);
-		}
-		body
 		{
 			return outer[start + i];
 		}
@@ -133,60 +137,24 @@ template Vector(T)
 			return typeof(return)(outer, start + i, start + j);
 		}
 
-		Range opIndex()
+		static if (isMutable!V)
 		{
-			return typeof(return)(outer, start, end);
+			Range opIndexAssign(T value)
-		}
-
-		Range opSlice(in size_t i, in size_t j)
-		in
-		{
-			assert(i <= j);
-			assert(start + j <= end);
-		}
-		body
-		{
-			return typeof(return)(outer, start + i, start + j);
-		}
-
-		static if (isMutable!Vector)
-		{
-			Range opIndexAssign(in T value)
-			in
-			{
-				assert(end <= outer.length);
-			}
-			body
 			{
 				return outer[start .. end] = value;
 			}
 
-			Range opSliceAssign(in T value, in size_t i, in size_t j)
+			Range opSliceAssign(T value, in size_t i, in size_t j)
-			in
-			{
-				assert(start + j <= end);
-			}
-			body
 			{
 				return outer[start + i .. start + j] = value;
 			}
 
-			Range opSliceAssign(in Range value, in size_t i, in size_t j)
+			Range opSliceAssign(Range value, in size_t i, in size_t j)
-			in
-			{
-				assert(length == value.length);
-			}
-			body
 			{
 				return outer[start + i .. start + j] = value;
 			}
 
-			Range opSliceAssign(in T[] value, in size_t i, in size_t j)
+			Range opSliceAssign(T[] value, in size_t i, in size_t j)
-			in
-			{
-				assert(j - i == value.length);
-			}
-			body
 			{
 				return outer[start + i .. start + j] = value;
 			}
@@ -205,49 +173,92 @@ template Vector(T)
 		/// Internal representation.
 		private T[] vector;
 
-		/// The allocator.
-		private shared Allocator allocator;
-
-		/**
-		 * Creates an empty $(D_PSYMBOL Vector).
-		 *
-		 * Params:
-		 * 	allocator = The allocator should be used for the element
-		 * 	            allocations.
-		 */
-		this(shared Allocator allocator)
-		{
-			this.allocator = allocator;
-		}
-
 		/**
 		 * Creates a new $(D_PSYMBOL Vector).
 		 *
 		 * Params:
-		 *  U      = Variadic template for the constructor parameters.
+		 * 	U         = Type of the static array with the initial elements.
-		 * 	params = Values to initialize the array with. The last parameter can
+		 * 	params    = Values to initialize the array with. Use $(D_PSYMBOL IL)
-		 * 	         be an allocator, if not, $(D_PSYMBOL defaultAllocator) is used.
+		 * 	            to generate a list.
+		 * 	allocator = Allocator.
 		 */
-		this(U...)(U params)
+		this(U)(U init, shared Allocator allocator = defaultAllocator)
+			if (isStaticArray!U)
+		in
 		{
-			static if (isImplicitlyConvertible!(typeof(params[$ - 1]), Allocator))
+			static assert(init.length > 0);
-			{
-				allocator = params[$ - 1];
-				auto values = params[0 .. $ - 1];
 		}
-			else
+		body
 		{
-				allocator = defaultAllocator;
+			this(allocator);
-				alias values = params;
+			vector = cast(T[]) allocator.allocate(init.length * T.sizeof);
+			if (vector is null)
+			{
+				onOutOfMemoryError();
+			}
+			vector[0 .. $] = init[0 .. $];
+			length_ = init.length;
 		}
 
-			resizeArray!T(allocator, vector, values.length);
+		/// Ditto.
-			length_ = values.length;
+		this(U)(U init, shared Allocator allocator = defaultAllocator) const
-
+			if (isStaticArray!U)
-			foreach (i, v; values)
+		in
 		{
-				vector[i] = v;
+			static assert(init.length > 0);
 		}
+		body
+		{
+			allocator_ = cast(const shared Allocator) allocator;
+			auto buf = cast(T[]) allocator.allocate(init.length * T.sizeof);
+			if (buf is null)
+			{
+				onOutOfMemoryError();
+			}
+			buf[0 .. $] = init[0 .. $];
+			vector = cast(const (T[])) buf;
+			length_ = init.length;
+		}
+
+		/// Ditto.
+		this(U)(U init, shared Allocator allocator = defaultAllocator) immutable
+			if (isStaticArray!U)
+		in
+		{
+			static assert(init.length > 0);
+		}
+		body
+		{
+			allocator_ = cast(immutable Allocator) allocator;
+			auto buf = cast(T[]) allocator.allocate(init.length * T.sizeof);
+			if (buf is null)
+			{
+				onOutOfMemoryError();
+			}
+			buf[0 .. $] = init[0 .. $];
+			vector = cast(immutable(T[])) buf;
+			length_ = init.length;
+		}
+
+		/// Ditto.
+		this(shared Allocator allocator)
+		in
+		{
+			assert(allocator !is null);
+		}
+		body
+		{
+			allocator_ = allocator;
+		}
+
+		///
+		unittest
+		{
+			auto v = Vector!int(IL(3, 8, 2));
+
+			assert(v.capacity == 3);
+			assert(v.length == 3);
+			assert(v[0] == 3 && v[1] == 8 && v[2] == 2);
 		}
 
 		/**
@@ -255,11 +266,7 @@ template Vector(T)
 		 */
 		~this()
 		{
-			if (allocator is null)
+			allocator.dispose(vector);
-			{
-				allocator = defaultAllocator;
-			}
-			dispose(allocator, vector);
 		}
 
 		/**
@@ -267,15 +274,16 @@ template Vector(T)
 		 */
 		void clear()
 		{
-			length_ = 0;
+			length = 0;
 		}
 
 		///
 		unittest
 		{
-			auto v = defaultAllocator.make!(Vector!int)(18, 20, 15);
+			auto v = Vector!int(IL(18, 20, 15));
 			v.clear();
 			assert(v.length == 0);
+			assert(v.capacity == 3);
 		}
 
 		/**
@@ -295,37 +303,7 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		size_t opDollar() inout const
+		alias opDollar = length;
-		{
-			return length;
-		}
-
-		/**
-		 * Reserves space for $(D_PARAM n) elements.
-		 */
-		void reserve(in size_t n)
-		{
-			if (allocator is null)
-			{
-				allocator = defaultAllocator;
-			}
-			if (vector.length < n)
-			{
-				allocator.resizeArray!T(vector, n);
-			}
-		}
-
-		///
-		unittest
-		{
-			Vector!int v;
-			assert(v.capacity == 0);
-			assert(v.length == 0);
-
-			v.reserve(3);
-			assert(v.capacity == 3);
-			assert(v.length == 0);
-		}
 
 		/**
 		 * Expands/shrinks the vector.
@@ -334,8 +312,26 @@ template Vector(T)
 		 * 	len = New length.
 		 */
 		@property void length(in size_t len)
+		{
+			if (len > length)
 			{
 				reserve(len);
+				vector[length .. len] = T.init;
+			}
+			else if (len < length)
+			{
+				static if (hasElaborateDestructor!T)
+				{
+					foreach (ref e; vector[len - 1 .. length_])
+					{
+						destroy(e);
+					}
+				}
+			}
+			else
+			{
+				return;
+			}
 			length_ = len;
 		}
 
@@ -352,11 +348,82 @@ template Vector(T)
 			assert(v.length == 7);
 			assert(v.capacity == 7);
 
+			assert(v[$ - 1] == 0);
+			v[$ - 1] = 3;
+			assert(v[$ - 1] == 3);
+
 			v.length = 0;
 			assert(v.length == 0);
 			assert(v.capacity == 7);
 		}
 
+		/**
+		 * Reserves space for $(D_PARAM size) elements.
+		 *
+		 * Params:
+		 * 	size = Desired size.
+		 */
+		void reserve(in size_t size) @trusted
+		{
+			if (vector.length < size)
+			{
+				void[] buf = vector;
+				allocator.reallocate(buf, size * T.sizeof);
+				vector = cast(T[]) buf;
+			}
+		}
+
+		///
+		unittest
+		{
+			Vector!int v;
+			assert(v.capacity == 0);
+			assert(v.length == 0);
+
+			v.reserve(3);
+			assert(v.capacity == 3);
+			assert(v.length == 0);
+		}
+
+		/**
+		 * Requests the vector to reduce its capacity to fit the $(D_PARAM size).
+		 *
+		 * The request is non-binding. The vector won't become smaller than the
+		 * $(D_PARAM length).
+		 *
+		 * Params:
+		 * 	size = Desired size.
+		 */
+		void shrink(in size_t size) @trusted
+		{
+			auto n = max(length, size);
+			void[] buf = vector;
+			allocator.reallocate(buf, n * T.sizeof);
+			vector = cast(T[]) buf;
+		}
+
+		///
+		unittest
+		{
+			Vector!int v;
+			assert(v.capacity == 0);
+			assert(v.length == 0);
+
+			v.reserve(5);
+			v.insertBack(1);
+			v.insertBack(3);
+			assert(v.capacity == 5);
+			assert(v.length == 2);
+
+			v.shrink(4);
+			assert(v.capacity == 4);
+			assert(v.length == 2);
+
+			v.shrink(1);
+			assert(v.capacity == 2);
+			assert(v.length == 2);
+		}
+
 		/**
 		 * Returns: $(D_KEYWORD true) if the vector is empty.
 		 */
@@ -381,14 +448,7 @@ template Vector(T)
 		{
 			immutable toRemove = min(howMany, length);
 
-			static if (hasElaborateDestructor!T)
+			length = length - toRemove;
-			{
-				foreach (ref e; vector[$ - toRemove ..$])
-				{
-					allocator.dispose(e);
-				}
-			}
-			length_ -= toRemove;
 
 			return toRemove;
 		}
@@ -399,7 +459,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(5, 18, 17);
+			auto v = Vector!int(IL(5, 18, 17));
 
 			assert(v.removeBack(0) == 0);
 			assert(v.removeBack(2) == 2);
@@ -412,7 +472,7 @@ template Vector(T)
 		 *
 		 * Returns: The number of elements inserted.
 		 */
-		size_t insertBack(in T el)
+		size_t insertBack(T el)
 		{
 			reserve(length + 1);
 			vector[length] = el;
@@ -421,12 +481,12 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		size_t insertBack(in Range el)
+		size_t insertBack(Range!Vector el)
 		{
 			immutable newLength = length + el.length;
 
 			reserve(newLength);
-			vector[length .. newLength] = el.data.vector[el.start .. el.end];
+			vector[length .. newLength] = el.outer.vector[el.start .. el.end];
 			length_ = newLength;
 
 			return el.length;
@@ -486,7 +546,7 @@ template Vector(T)
 			assert(v1.capacity == 4);
 			assert(v1[0] == 5 && v1[1] == 6 && v1[2] == 4 && v1[3] == 2);
 
-			auto v2 = Vector!int(34, 234);
+			auto v2 = Vector!int(IL(34, 234));
 			assert(v1.insertBack(v2[]) == 2);
 			assert(v1.length == 6);
 			assert(v1.capacity == 6);
@@ -504,7 +564,7 @@ template Vector(T)
 		 *
 		 * Precondition: $(D_INLINECODE length > pos)
 		 */
-		T opIndexAssign(in T value, in size_t pos)
+		T opIndexAssign(T value, in size_t pos)
 		in
 		{
 			assert(length > pos);
@@ -515,7 +575,7 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		Range opIndexAssign(in T value)
+		Range!Vector opIndexAssign(T value)
 		{
 			vector[0 .. $] = value;
 			return opIndex();
@@ -524,7 +584,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v1 = Vector!int(12, 1, 7);
+			auto v1 = Vector!int(IL(12, 1, 7));
 
 			v1[] = 3;
 			assert(v1[0] == 3);
@@ -549,7 +609,19 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		Range opIndex()
+		Range!Vector opIndex()
+		{
+			return typeof(return)(this, 0, length);
+		}
+
+		/// Ditto.
+		Range!(const Vector) opIndex() const
+		{
+			return typeof(return)(this, 0, length);
+		}
+
+		/// Ditto.
+		Range!(immutable Vector) opIndex() immutable
 		{
 			return typeof(return)(this, 0, length);
 		}
@@ -557,12 +629,18 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(6, 123, 34, 5);
+			const v1 = Vector!int(IL(6, 123, 34, 5));
 
-			assert(v[0] == 6);
+			assert(v1[0] == 6);
-			assert(v[1] == 123);
+			assert(v1[1] == 123);
-			assert(v[2] == 34);
+			assert(v1[2] == 34);
-			assert(v[3] == 5);
+			assert(v1[3] == 5);
+			static assert(is(typeof(v1[0]) == const(int)));
+			static assert(is(typeof(v1[])));
+
+			auto v2 = immutable Vector!int(IL(6, 123, 34, 5));
+			static assert(is(typeof(v2[0]) == immutable(int)));
+			static assert(is(typeof(v2[])));
 		}
 
 		/**
@@ -574,13 +652,13 @@ template Vector(T)
 		 * Returns: $(D_KEYWORD true) if the vectors are equal, $(D_KEYWORD false)
 		 *          otherwise.
 		 */
-		bool opEquals(typeof(this) v)
+		bool opEquals(typeof(this) v) const
 		{
 			return opEquals(v);
 		}
 
 		/// Ditto.
-		bool opEquals(ref typeof(this) v)
+		bool opEquals(ref typeof(this) v) const
 		{
 			return vector == v.vector;
 		}
@@ -673,7 +751,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(5, 15, 8);
+			auto v = Vector!int(IL(5, 15, 8));
 
 			size_t i;
 			foreach (j, ref e; v)
@@ -693,7 +771,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(5, 15, 8);
+			auto v = Vector!int(IL(5, 15, 8));
 			size_t i;
 
 			foreach_reverse (j, ref e; v)
@@ -728,7 +806,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(5);
+			auto v = Vector!int(IL(5));
 
 			assert(v.front == 5);
 
@@ -755,7 +833,7 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v = Vector!int(5);
+			auto v = Vector!int(IL(5));
 
 			assert(v.back == 5);
 
@@ -774,7 +852,7 @@ template Vector(T)
 		 *
 		 * Precondition: $(D_INLINECODE i <= j && j <= length)
 		 */
-		Range opSlice(in size_t i, in size_t j)
+		Range!Vector opSlice(in size_t i, in size_t j)
 		in
 		{
 			assert(i <= j);
@@ -798,7 +876,7 @@ template Vector(T)
 		 * Precondition: $(D_INLINECODE i <= j && j <= length);
 		 *               The lenghts of the ranges and slices match.
 		 */
-		Range opSliceAssign(in T value, in size_t i, in size_t j)
+		Range!Vector opSliceAssign(T value, in size_t i, in size_t j)
 		in
 		{
 			assert(i <= j);
@@ -811,7 +889,7 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		Range opSliceAssign(in Range value, in size_t i, in size_t j)
+		Range!Vector opSliceAssign(Range!Vector value, in size_t i, in size_t j)
 		in
 		{
 			assert(j - i == value.length);
@@ -823,7 +901,7 @@ template Vector(T)
 		}
 
 		/// Ditto.
-		Range opSliceAssign(in T[] value, in size_t i, in size_t j)
+		Range!Vector opSliceAssign(T[] value, in size_t i, in size_t j)
 		in
 		{
 			assert(j - i == value.length);
@@ -837,8 +915,8 @@ template Vector(T)
 		///
 		unittest
 		{
-			auto v1 = Vector!int(3, 3, 3);
+			auto v1 = Vector!int(IL(3, 3, 3));
-			auto v2 = Vector!int(1, 2);
+			auto v2 = Vector!int(IL(1, 2));
 
 			v1[0 .. 2] = 286;
 			assert(v1[0] == 286);
@@ -849,20 +927,69 @@ template Vector(T)
 			assert(v2[0] == 286);
 			assert(v2[1] == 3);
 		}
+
+		mixin DefaultAllocator;
 	}
 }
 
 ///
 unittest
 {
-	auto v = Vector!int(5, 15, 8);
+	auto v = Vector!int(IL(5, 15, 8));
 
 	assert(v.front == 5);
 	assert(v[1] == 15);
 	assert(v.back == 8);
 }
 
-private unittest
+private @nogc unittest
 {
-//	const Vector!int v;
+	// Test the destructor can be called at the end of the scope.
+	auto a = Vector!A();
+
+	// Test that structs can be members of the vector.
+	static assert(is(typeof(Vector!TestA())));
+	static assert(is(typeof(immutable Vector!TestA(IL(TestA())))));
+	static assert(is(typeof(const Vector!TestA(IL(TestA())))));
+}
+
+private @nogc unittest
+{
+	const v1 = Vector!int();
+	const Vector!int v2;
+	const v3 = Vector!int(IL(1, 5, 8));
+	static assert(is(typeof(v3.vector) == const(int[])));
+	static assert(is(typeof(v3.vector[0]) == const(int)));
+
+	immutable v4 = immutable Vector!int();
+	immutable v5 = immutable Vector!int(IL(2, 5, 8));
+	static assert(is(typeof(v4.vector) == immutable(int[])));
+	static assert(is(typeof(v4.vector[0]) == immutable(int)));
+}
+
+private @nogc unittest
+{
+	// Test that immutable/const vectors return usable ranges.
+	auto v = immutable Vector!int(IL(1, 2, 4));
+	auto r = v[];
+
+	assert(r.back == 4);
+	r.popBack();
+	assert(r.back == 2);
+	r.popBack();
+	assert(r.back == 1);
+	r.popBack();
+}
+
+private @nogc unittest
+{
+	Vector!int v1;
+	const Vector!int v2;
+
+	auto r1 = v1[];
+	auto r2 = v1[];
+
+	assert(r1.length == 0);
+	assert(r2.empty);
+	assert(r1 == r2);
 }

source/tanya/math/mp.d

@@ -26,12 +26,6 @@ struct Integer
 {
 	private ubyte[] rep;
 	private bool sign;
-	private shared Allocator allocator;
-
-	pure nothrow @safe @nogc invariant
-	{
-		assert(rep.length || !sign, "0 should be positive.");
-	}
 
 	/**
 	 * Creates a multiple precision integer.
@@ -52,25 +46,29 @@ struct Integer
 		{
 			assignInt(value);
 		}
-		else
+		else if (value.length > 0)
 		{
 			rep = () @trusted {
-				return cast(ubyte[]) allocator.allocate(value.length);
+				return cast(ubyte[]) allocator_.allocate(value.length);
 			}();
+			if (rep is null)
+			{
+				onOutOfMemoryError();
+			}
 			value.rep.copy(rep);
 			sign = value.sign;
 		}
 	}
 
 	/// Ditto.
-	this(shared Allocator allocator) nothrow @safe @nogc
+	this(shared Allocator allocator) pure nothrow @safe @nogc
 	in
 	{
 		assert(allocator !is null);
 	}
 	body
 	{
-		this.allocator = allocator;
+		allocator_ = allocator;
 	}
 
 	private @nogc unittest
@@ -86,23 +84,13 @@ struct Integer
 		assert(h2.sign);
 	}
 
+	/**
+	 * Destroys the internal representation.
+	 */
 	~this() nothrow @safe @nogc
-	in
-	{
-		assert(allocator !is null || !rep.length);
-	}
-	body
-	{
-		if (allocator !is null)
 	{
 		allocator.dispose(rep);
 	}
-	}
-
-	private @nogc unittest
-	{
-		Integer h; // allocator isn't set, but the destructor should work
-	}
 
 	/*
 	 * Figures out the minimum amount of space this value will take
@@ -113,7 +101,6 @@ struct Integer
 	in
 	{
 		static assert(isIntegral!T);
-		assert(allocator !is null);
 	}
 	body
 	{
@@ -169,7 +156,6 @@ struct Integer
 	ref Integer opAssign(T)(in auto ref T value) nothrow @safe @nogc
 		if (isIntegral!T || is(T == Integer))
 	{
-		initialize();
 		static if (isIntegral!T)
 		{
 			assignInt(value);
@@ -292,16 +278,22 @@ struct Integer
 		assert(h1 > h2);
 	}
 
-	private void add(in ref ubyte[] h) nothrow @safe @nogc
+	private void add(in ref ubyte[] h) nothrow @trusted @nogc
 	{
 		uint sum;
 		uint carry = 0;
+		ubyte[] tmp;
 
 		if (h.length > length)
 		{
-			auto tmp = allocator.makeArray!ubyte(h.length);
+			tmp = cast(ubyte[]) allocator.allocate(h.length);
+			if (tmp is null)
+			{
+				onOutOfMemoryError();
+			}
+			tmp[0 .. h.length] = 0;
 			tmp[h.length - length .. $] = rep[0 .. length];
-			rep = tmp;
+			swap(rep, tmp);
 		}
 
 		auto i = length;
@@ -327,15 +319,16 @@ struct Integer
 		if (carry)
 		{
 			// Still overflowed; allocate more space
-			auto tmp = allocator.makeArray!ubyte(length + 1);
+			void[]* vtmp = cast(void[]*) &tmp;
+			allocator.reallocate(*vtmp, length + 1);
 			tmp[1 .. $] = rep[0 .. length];
 			tmp[0] = 0x01;
-			rep = tmp;
+			swap(rep, tmp);
+		}
+		allocator.deallocate(tmp);
 	}
 
-	}
+	private void subtract(in ref ubyte[] h) nothrow @trusted @nogc
-
-	private void subtract(in ref ubyte[] h) nothrow @safe @nogc
 	{
 		auto i = rep.length;
 		auto j = h.length;
@@ -369,13 +362,14 @@ struct Integer
 		immutable offset = rep.countUntil!((const ref a) => a != 0);
 		if (offset > 0)
 		{
-			ubyte[] tmp = allocator.makeArray!ubyte(rep.length - offset);
+			ubyte[] tmp = cast(ubyte[]) allocator.allocate(rep.length - offset);
 			rep[offset .. $].copy(tmp);
+			allocator.deallocate(rep);
 			rep = tmp;
 		}
 		else if (offset == -1)
 		{
-			allocator.resizeArray(rep, 0);
+			allocator.dispose(rep);
 		}
 	}
 
@@ -392,11 +386,11 @@ struct Integer
 		if ((op == "+") || (op == "-"))
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
 	{
-		initialize();
 		static if (op == "+")
 		{
 			if (h.sign == sign)
@@ -505,6 +499,7 @@ struct Integer
 		if (op == "*")
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
@@ -550,8 +545,6 @@ struct Integer
 	}
 	body
 	{
-		initialize();
-
 		auto divisor = Integer(h, allocator);
 		size_t bitSize;
 
@@ -562,7 +555,9 @@ struct Integer
 		}
 		static if (op == "/")
 		{
-			auto quotient = allocator.makeArray!ubyte(bitSize / 8 + 1);
+			auto quotient = (() @trusted =>
+				cast(ubyte[]) allocator.allocate(bitSize / 8 + 1)
+			)();
 		}
 
 		// "bitPosition" keeps track of which bit, of the quotient,
@@ -592,8 +587,8 @@ struct Integer
 
 		static if (op == "/")
 		{
-			swap(rep, quotient);
+			() @trusted { allocator.deallocate(rep); }();
-			allocator.dispose(quotient);
+			rep = quotient;
 			sign = sign == h.sign ? false : true;
 		}
 		return this;
@@ -628,6 +623,7 @@ struct Integer
 		if (op == "^^")
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
@@ -683,7 +679,6 @@ struct Integer
 	Integer opUnary(string op)() nothrow @safe @nogc
 		if ((op == "+") || (op == "-") || (op == "~"))
 	{
-		initialize();
 		auto h = Integer(this, allocator);
 		static if (op == "-")
 		{
@@ -772,12 +767,11 @@ struct Integer
 		if ((op == "++") || (op == "--"))
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
 	{
-		initialize();
-
 		static if (op == "++")
 		{
 			if (sign)
@@ -848,14 +842,6 @@ struct Integer
 		assert(h.rep[0] == 0x01);
 	}
 
-	private void initialize() nothrow @safe @nogc
-	{
-		if (allocator is null)
-		{
-			allocator = defaultAllocator;
-		}
-	}
-
 	/**
 	 * Casting.
 	 *
@@ -917,13 +903,13 @@ struct Integer
 		if (op == ">>")
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
 	{
 		immutable step = n / 8;
 
-		initialize();
 		if (step >= rep.length)
 		{
 			allocator.resizeArray(rep, 0);
@@ -994,6 +980,7 @@ struct Integer
 		if (op == "<<")
 	out
 	{
+		assert(rep.length || !sign, "0 should be positive.");
 		assert(!rep.length || rep[0]);
 	}
 	body
@@ -1004,7 +991,6 @@ struct Integer
 		immutable bit = n % 8;
 		immutable delta = 8 - bit;
 
-		initialize();
 		if (cast(ubyte) (rep[0] >> delta))
 		{
 			allocator.resizeArray(rep, i + n / 8 + 1);
@@ -1043,7 +1029,6 @@ struct Integer
 		if (op == "<<" || op == ">>" || op == "+" || op == "-" || op == "/"
 		 || op == "*" || op == "^^" || op == "%")
 	{
-		initialize();
 		auto ret = Integer(this, allocator);
 		mixin("ret " ~ op ~ "= n;");
 		return ret;
@@ -1065,9 +1050,10 @@ struct Integer
 		if (op == "+" || op == "-" || op == "/"
 		 || op == "*" || op == "^^" || op == "%")
 	{
-		initialize();
 		auto ret = Integer(this, allocator);
 		mixin("ret " ~ op ~ "= h;");
 		return ret;
 	}
+
+	mixin DefaultAllocator;
 }

source/tanya/memory/allocator.d

@@ -28,7 +28,7 @@ interface Allocator
 	 *
 	 * Returns: Pointer to the new allocated memory.
 	 */
-	void[] allocate(size_t size) shared nothrow @safe @nogc;
+	void[] allocate(size_t size) shared nothrow @nogc;
 
 	/**
 	 * Deallocates a memory block.
@@ -38,7 +38,7 @@ interface Allocator
 	 *
 	 * Returns: Whether the deallocation was successful.
 	 */
-	bool deallocate(void[] p) shared nothrow @safe @nogc;
+	bool deallocate(void[] p) shared nothrow @nogc;
 
 	/**
 	 * Increases or decreases the size of a memory block.
@@ -49,5 +49,32 @@ interface Allocator
 	 *
 	 * Returns: Pointer to the allocated memory.
 	 */
-	bool reallocate(ref void[] p, size_t size) shared nothrow @safe @nogc;
+	bool reallocate(ref void[] p, size_t size) shared nothrow @nogc;
+}
+
+/**
+ * The mixin generates common methods for classes and structs using
+ * allocators. It provides a protected member and a read-only property,
+ * that checks if an allocator was already set and sets it to the default
+ * one, if not (useful for structs which don't have a default constructor).
+ */
+mixin template DefaultAllocator()
+{
+	/// Allocator.
+	protected shared Allocator allocator_;
+
+	/**
+	 * This property checks if the allocator was set in the constructor
+	 * and sets it to the default one, if not.
+	 *
+	 * Returns: Used allocator.
+	 */
+	@property shared(Allocator) allocator() nothrow @safe @nogc
+	{
+		if (allocator_ is null)
+		{
+			allocator_ = defaultAllocator;
+		}
+		return allocator_;
+	}
 }

source/tanya/memory/mmappool.d

@@ -73,7 +73,7 @@ final class MmapPool : Allocator
 	 *
 	 * Returns: Pointer to the new allocated memory.
 	 */
-	void[] allocate(size_t size) shared nothrow @trusted
+	void[] allocate(size_t size) shared nothrow
 	{
 		if (!size)
 		{
@@ -91,7 +91,7 @@ final class MmapPool : Allocator
 	}
 
 	///
-	@safe nothrow unittest
+	nothrow unittest
 	{
 		auto p = MmapPool.instance.allocate(20);
 
@@ -167,7 +167,7 @@ final class MmapPool : Allocator
 	 *
 	 * Returns: Whether the deallocation was successful.
 	 */
-	bool deallocate(void[] p) shared nothrow @trusted
+	bool deallocate(void[] p) shared nothrow
 	{
 		if (p is null)
 		{
@@ -207,7 +207,7 @@ final class MmapPool : Allocator
 	}
 
 	///
-	@safe nothrow unittest
+	nothrow unittest
 	{
 		auto p = MmapPool.instance.allocate(20);
 
@@ -223,7 +223,7 @@ final class MmapPool : Allocator
 	 *
 	 * Returns: Whether the reallocation was successful.
 	 */
-	bool reallocate(ref void[] p, size_t size) shared nothrow @trusted
+	bool reallocate(ref void[] p, size_t size) shared nothrow
 	{
 		void[] reallocP;
 
@@ -291,7 +291,7 @@ final class MmapPool : Allocator
 	 *
 	 * Returns: Global $(D_PSYMBOL MmapPool) instance.
 	 */
-	static @property ref shared(MmapPool) instance() nothrow @trusted
+	static @property ref shared(MmapPool) instance() nothrow
 	{
 		if (instance_ is null)
 		{
@@ -310,7 +310,7 @@ final class MmapPool : Allocator
 	}
 
 	///
-	@safe nothrow unittest
+	nothrow unittest
 	{
 		assert(instance is instance);
 	}

source/tanya/memory/package.d

@@ -20,7 +20,7 @@ private extern (C) void _d_monitordelete(Object h, bool det) nothrow @nogc;
 
 shared Allocator allocator;
 
-shared static this() nothrow @safe @nogc
+shared static this() nothrow @trusted @nogc
 {
 	import tanya.memory.mmappool;
 	allocator = MmapPool.instance;
@@ -75,17 +75,20 @@ bool resizeArray(T)(shared Allocator allocator,
 	void[] buf = array;
 	immutable oldLength = array.length;
 
+	auto result = () @trusted {
 		if (!allocator.reallocate(buf, length * T.sizeof))
 		{
 			return false;
 		}
-	// Casting from void[] is unsafe, but we know we cast to the original type
+		// Casting from void[] is unsafe, but we know we cast to the original type.
-	array = () @trusted { return cast(T[]) buf; }();
+		array = cast(T[]) buf;
-	if (oldLength < length)
+		return true;
+	}();
+	if (result && oldLength < length)
 	{
 		array[oldLength .. $] = init;
 	}
-	return true;
+	return result;
 }
 
 ///
@@ -106,26 +109,6 @@ unittest
 	assert(p is null);
 }
 
-private void deStruct(T)(ref T s)
-	if (is(T == struct))
-{
-	static if (__traits(hasMember, T, "__xdtor")
-	      &&   __traits(isSame, T, __traits(parent, s.__xdtor)))
-	{
-		s.__xdtor();
-	}
-	auto buf = (cast(ubyte*) &s)[0 .. T.sizeof];
-	auto init = cast(ubyte[])typeid(T).initializer();
-	if (init.ptr is null) // null ptr means initialize to 0s
-	{
-		buf[] = 0;
-	}
-	else
-	{
-		buf[] = init[];
-	}
-}
-
 /**
  * Destroys and deallocates $(D_PARAM p) of type $(D_PARAM T).
  * It is assumed the respective entities had been allocated with the same
@@ -136,17 +119,18 @@ private void deStruct(T)(ref T s)
  * 	allocator = Allocator the $(D_PARAM p) was allocated with.
  * 	p         = Object or array to be destroyed.
  */
-void dispose(T)(shared Allocator allocator, T* p)
+void dispose(T)(shared Allocator allocator, auto ref T* p)
 {
 	static if (hasElaborateDestructor!T)
 	{
-		deStruct(*p);
+		destroy(*p);
 	}
-    allocator.deallocate((cast(void*) p)[0 .. T.sizeof]);
+	() @trusted { allocator.deallocate((cast(void*) p)[0 .. T.sizeof]); }();
+	p = null;
 }
 
 /// Ditto.
-void dispose(T)(shared Allocator allocator, T p)
+void dispose(T)(shared Allocator allocator, auto ref T p)
 	if (is(T == class) || is(T == interface))
 {
 	if (p is null)
@@ -172,7 +156,8 @@ void dispose(T)(shared Allocator allocator, T p)
 	auto support = ptr[0 .. typeid(ob).initializer.length];
 	scope (success)
 	{
-		allocator.deallocate(support);
+		() @trusted { allocator.deallocate(support); }();
+		p = null;
 	}
 
 	auto ppv = cast(void**) ptr;
@@ -193,7 +178,7 @@ void dispose(T)(shared Allocator allocator, T p)
 		// shouldn't throw and if it does, it is an error anyway.
 		if (c.destructor)
 		{
-			(cast(void function (Object) nothrow @nogc) c.destructor)(ob);
+			(cast(void function (Object) nothrow @safe @nogc) c.destructor)(ob);
 		}
 	}
 	while ((c = c.base) !is null);
@@ -202,19 +187,18 @@ void dispose(T)(shared Allocator allocator, T p)
 	{
 		_d_monitordelete(cast(Object) ptr, true);
 	}
-	auto w = (*pc).initializer;
-	ptr[0 .. w.length] = w[];
 }
 
 /// Ditto.
-void dispose(T)(shared Allocator allocator, T[] array)
+void dispose(T)(shared Allocator allocator, auto ref T[] array)
 {
 	static if (hasElaborateDestructor!(typeof(array[0])))
 	{
 	foreach (ref e; array)
 	{
-            deStruct(e);
+	    destroy(e);
 	}
 	}
-    allocator.deallocate(array);
+	() @trusted { allocator.deallocate(array); }();
+	array = null;
 }

source/tanya/network/socket.d

@@ -425,9 +425,10 @@ else version (Windows)
 			DWORD dwBytes;
 			overlapped.handle = cast(HANDLE) socket;
 			overlapped.event = OverlappedSocketEvent.accept;
-			overlapped.buffer.len = (sockaddr_in.sizeof + 16) * 2;
+
-			overlapped.buffer.buf = makeArray!char(defaultAllocator,
+			immutable len = (sockaddr_in.sizeof + 16) * 2;
-			                                       overlapped.buffer.len).ptr;
+			overlapped.buffer.len = len;
+			overlapped.buffer.buf = cast(char*) defaultAllocator.allocate(len).ptr;
 
 			// We don't want to get any data now, but only start to accept the connections
 			BOOL result = acceptExtension(handle_,
@@ -1267,12 +1268,12 @@ class InternetAddress : Address
 		port_ = port;
 
 		// Make C-string from host.
-		char[] node = defaultAllocator.makeArray!char(host.length + 1);
+		auto node = cast(char[]) allocator.allocate(host.length + 1);
 		node[0.. $ - 1] = host;
 		node[$ - 1] = '\0';
 		scope (exit)
 		{
-			defaultAllocator.dispose(node);
+			allocator.deallocate(node);
 		}
 
 		// Convert port to a C-string.

source/tanya/traits.d

@@ -11,6 +11,7 @@
 module tanya.traits;
 
 import std.traits;
+import std.meta;
 
 /**
  * Params:
@@ -21,3 +22,36 @@ import std.traits;
  */
 enum bool isReference(T) = isDynamicArray!T || isPointer!T
                         || is(T == class) || is(T == interface);
+
+/**
+ * Initializer list.
+ *
+ * Generates a static array with elements from $(D_PARAM args). All elements
+ * should have the same type. It can be used in constructors which accept a
+ * list of the elements of the same type in the situations where variadic
+ * functions and templates can't be used.
+ *
+ * Params:
+ * 	Args = Argument type.
+ * 	args = Arguments.
+ */
+static enum IL(Args...)(Args args)
+	if (Args.length > 0)
+{
+	alias BaseType = typeof(args[0]);
+
+	BaseType[args.length] result;
+
+	foreach (i, a; args)
+	{
+		static assert(isImplicitlyConvertible!(typeof(a), BaseType));
+		result[i] = a;
+	}
+	return result;
+}
+
+///
+unittest
+{
+	static assert(IL(1, 5, 8).length == 3);
+}