From ad46afb10bca80086b11b998bf4c992dc96f577e Mon Sep 17 00:00:00 2001
From: Eugen Wissner <belka@caraus.de>
Date: Fri, 22 Mar 2019 08:18:01 +0100
Subject: [PATCH] Move memory/package.d into memory.allocator

---
 .travis.yml                         |   1 -
 README.md                           |  10 +-
 appveyor.yml                        |   6 -
 middle/tanya/memory/allocator.d     | 416 ++++++++++++++++++++++++++++
 middle/tanya/memory/lifetime.d      | 309 +--------------------
 middle/tanya/memory/op.d            |  46 +--
 middle/tanya/memory/package.d       | 112 --------
 middle/tanya/memory/smartref.d      |   3 +-
 source/tanya/async/event/epoll.d    |   4 +-
 source/tanya/async/event/iocp.d     |   4 +-
 source/tanya/async/event/kqueue.d   |   4 +-
 source/tanya/async/event/selector.d |   4 +-
 source/tanya/async/iocp.d           |   2 +-
 source/tanya/async/loop.d           |   4 +-
 source/tanya/async/package.d        |   2 +-
 source/tanya/async/protocol.d       |   2 +-
 source/tanya/async/transport.d      |   2 +-
 source/tanya/async/watcher.d        |   4 +-
 source/tanya/container/array.d      |   3 +-
 source/tanya/container/buffer.d     |   2 +-
 source/tanya/container/hashtable.d  |   3 +-
 source/tanya/container/list.d       |   3 +-
 source/tanya/container/set.d        |   3 +-
 source/tanya/container/string.d     |   3 +-
 source/tanya/conv.d                 |  10 +-
 source/tanya/exception.d            |   4 +-
 source/tanya/format.d               |  18 +-
 source/tanya/math/mp.d              |   3 +-
 source/tanya/math/random.d          |   2 +-
 source/tanya/net/uri.d              |   2 +-
 source/tanya/network/package.d      |   2 +-
 source/tanya/network/socket.d       |   4 +-
 source/tanya/typecons.d             |   6 +-
 test/tanya/test/assertion.d         |   4 +-
 test/tanya/test/package.d           |   2 +-
 test/tanya/test/stub.d              |   2 +-
 tests/tanya/async/tests/loop.d      |   2 +-
 tests/tanya/container/tests/array.d |   2 +-
 tests/tanya/container/tests/set.d   |   2 +-
 tests/tanya/math/tests/random.d     |   2 +-
 tests/tanya/memory/tests/lifetime.d |   3 +-
 tests/tanya/memory/tests/smartref.d |   2 +-
 tests/tanya/tests/format.d          |   2 +-
 43 files changed, 489 insertions(+), 537 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 5ac104b..1871bd1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,6 @@ language: d
 
 d:
 - dmd-2.085.0
-- dmd-2.084.1
 - dmd-2.082.1
 
 env:
diff --git a/README.md b/README.md
index a1b7ece..5232a57 100644
--- a/README.md
+++ b/README.md
@@ -172,12 +172,10 @@ parameter is used)
 
 ### Supported compilers
 
-| DMD     | GCC             |
-|:-------:|:---------------:|
-| 2.085.0 | gdc-8 (2.081.2) |
-| 2.084.1 | gdc-7 (2.081.2) |
-| 2.083.1 |                 |
-| 2.082.1 |                 |
+| DMD               | GCC             |
+|:-----------------:|:---------------:|
+| 2.081.2 — 2.085.0 | gdc-8 (2.081.2) |
+|                   | gdc-7 (2.081.2) |
 
 ### Release management
 
diff --git a/appveyor.yml b/appveyor.yml
index 2b15380..1437042 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,12 +9,6 @@ environment:
     - DC: dmd
       DVersion: 2.085.0
       arch: x86
-    - DC: dmd
-      DVersion: 2.084.1
-      arch: x64
-    - DC: dmd
-      DVersion: 2.084.1
-      arch: x86
     - DC: dmd
       DVersion: 2.082.1
       arch: x64
diff --git a/middle/tanya/memory/allocator.d b/middle/tanya/memory/allocator.d
index bf356af..96f3a29 100644
--- a/middle/tanya/memory/allocator.d
+++ b/middle/tanya/memory/allocator.d
@@ -17,6 +17,9 @@
  */
 module tanya.memory.allocator;
 
+import tanya.memory.lifetime;
+import tanya.meta.trait;
+
 /**
  * Abstract class implementing a basic allocator.
  */
@@ -79,3 +82,416 @@ package template GetPureInstance(T : Allocator)
     alias GetPureInstance = shared(T) function()
                             pure nothrow @nogc;
 }
+
+/**
+ * The mixin generates common methods for classes and structs using
+ * allocators. It provides a protected member, constructor 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_;
+
+    /**
+     * Params:
+     *  allocator = The allocator should be used.
+     *
+     * Precondition: $(D_INLINECODE allocator_ !is null)
+     */
+    this(shared Allocator allocator) @nogc nothrow pure @safe
+    in (allocator !is null)
+    {
+        this.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.
+     *
+     * Postcondition: $(D_INLINECODE allocator !is null)
+     */
+    @property shared(Allocator) allocator() @nogc nothrow pure @safe
+    out (allocator; allocator !is null)
+    {
+        if (allocator_ is null)
+        {
+            allocator_ = defaultAllocator;
+        }
+        return allocator_;
+    }
+
+    /// ditto
+    @property shared(Allocator) allocator() const @nogc nothrow pure @trusted
+    out (allocator; allocator !is null)
+    {
+        if (allocator_ is null)
+        {
+            return defaultAllocator;
+        }
+        return cast(shared Allocator) allocator_;
+    }
+}
+
+shared Allocator allocator;
+
+private shared(Allocator) getAllocatorInstance() @nogc nothrow
+{
+    if (allocator is null)
+    {
+        version (TanyaNative)
+        {
+            import tanya.memory.mmappool : MmapPool;
+            defaultAllocator = MmapPool.instance;
+        }
+        else
+        {
+            import tanya.memory.mallocator : Mallocator;
+            defaultAllocator = Mallocator.instance;
+        }
+    }
+    return allocator;
+}
+
+/**
+ * Returns: Default allocator.
+ *
+ * Postcondition: $(D_INLINECODE allocator !is null).
+ */
+@property shared(Allocator) defaultAllocator() @nogc nothrow pure @trusted
+out (allocator; allocator !is null)
+{
+    return (cast(GetPureInstance!Allocator) &getAllocatorInstance)();
+}
+
+/**
+ * Sets the default allocator.
+ *
+ * Params:
+ *  allocator = $(D_PSYMBOL Allocator) instance.
+ *
+ * Precondition: $(D_INLINECODE allocator !is null).
+ */
+@property void defaultAllocator(shared(Allocator) allocator) @nogc nothrow @safe
+in (allocator !is null)
+{
+    .allocator = allocator;
+}
+
+/**
+ * Params:
+ *  size      = Raw size.
+ *  alignment = Alignment.
+ *
+ * Returns: Aligned size.
+ */
+size_t alignedSize(const size_t size, const size_t alignment = 8)
+pure nothrow @safe @nogc
+{
+    return (size - 1) / alignment * alignment + alignment;
+}
+
+/**
+ * Error thrown if memory allocation fails.
+ */
+final class OutOfMemoryError : Error
+{
+    /**
+     * Constructs new error.
+     *
+     * Params:
+     *  msg  = The message for the exception.
+     *  file = The file where the exception occurred.
+     *  line = The line number where the exception occurred.
+     *  next = The previous exception in the chain of exceptions, if any.
+     */
+    this(string msg = "Out of memory",
+         string file = __FILE__,
+         size_t line = __LINE__,
+         Throwable next = null) @nogc nothrow pure @safe
+    {
+        super(msg, file, line, next);
+    }
+
+    /// ditto
+    this(string msg,
+         Throwable next,
+         string file = __FILE__,
+         size_t line = __LINE__) @nogc nothrow pure @safe
+    {
+        super(msg, file, line, next);
+    }
+}
+
+/**
+ * Destroys and deallocates $(D_PARAM p) of type $(D_PARAM T).
+ * It is assumed the respective entities had been allocated with the same
+ * allocator.
+ *
+ * Params:
+ *  T         = Type of $(D_PARAM p).
+ *  allocator = Allocator the $(D_PARAM p) was allocated with.
+ *  p         = Object or array to be destroyed.
+ */
+void dispose(T)(shared Allocator allocator, auto ref T p)
+{
+    () @trusted { allocator.deallocate(finalize(p)); }();
+    p = null;
+}
+
+/**
+ * Constructs a new class instance of type $(D_PARAM T) using $(D_PARAM args)
+ * as the parameter list for the constructor of $(D_PARAM T).
+ *
+ * Params:
+ *  T         = Class type.
+ *  A         = Types of the arguments to the constructor of $(D_PARAM T).
+ *  allocator = Allocator.
+ *  args      = Constructor arguments of $(D_PARAM T).
+ *
+ * Returns: Newly created $(D_PSYMBOL T).
+ *
+ * Precondition: $(D_INLINECODE allocator !is null)
+ */
+T make(T, A...)(shared Allocator allocator, auto ref A args)
+if (is(T == class))
+in (allocator !is null)
+{
+    auto mem = (() @trusted => allocator.allocate(stateSize!T))();
+    if (mem is null)
+    {
+        onOutOfMemoryError();
+    }
+    scope (failure)
+    {
+        () @trusted { allocator.deallocate(mem); }();
+    }
+
+    return emplace!T(mem[0 .. stateSize!T], args);
+}
+
+/**
+ * Constructs a value object of type $(D_PARAM T) using $(D_PARAM args)
+ * as the parameter list for the constructor of $(D_PARAM T) and returns a
+ * pointer to the new object.
+ *
+ * Params:
+ *  T         = Object type.
+ *  A         = Types of the arguments to the constructor of $(D_PARAM T).
+ *  allocator = Allocator.
+ *  args      = Constructor arguments of $(D_PARAM T).
+ *
+ * Returns: Pointer to the created object.
+ *
+ * Precondition: $(D_INLINECODE allocator !is null)
+ */
+T* make(T, A...)(shared Allocator allocator, auto ref A args)
+if (!isPolymorphicType!T && !isAssociativeArray!T && !isArray!T)
+in (allocator !is null)
+{
+    auto mem = (() @trusted => allocator.allocate(stateSize!T))();
+    if (mem is null)
+    {
+        onOutOfMemoryError();
+    }
+    scope (failure)
+    {
+        () @trusted { allocator.deallocate(mem); }();
+    }
+    return emplace!T(mem[0 .. stateSize!T], args);
+}
+
+///
+@nogc nothrow pure @safe unittest
+{
+    int* i = defaultAllocator.make!int(5);
+    assert(*i == 5);
+    defaultAllocator.dispose(i);
+}
+
+/**
+ * Constructs a new array with $(D_PARAM n) elements.
+ *
+ * Params:
+ *  T         = Array type.
+ *  E         = Array element type.
+ *  allocator = Allocator.
+ *  n         = Array size.
+ *
+ * Returns: Newly created array.
+ *
+ * Precondition: $(D_INLINECODE allocator !is null
+ *                           && n <= size_t.max / E.sizeof)
+ */
+T make(T : E[], E)(shared Allocator allocator, size_t n)
+in (allocator !is null)
+in (n <= size_t.max / E.sizeof)
+{
+    auto ret = allocator.resize!E(null, n);
+
+    static if (hasElaborateDestructor!E)
+    {
+        for (auto range = ret; range.length != 0; range = range[1 .. $])
+        {
+            emplace!E(cast(void[]) range[0 .. 1], E.init);
+        }
+    }
+    else
+    {
+        ret[] = E.init;
+    }
+
+    return ret;
+}
+
+///
+@nogc nothrow pure @safe unittest
+{
+    int[] i = defaultAllocator.make!(int[])(2);
+    assert(i.length == 2);
+    assert(i[0] == int.init && i[1] == int.init);
+    defaultAllocator.dispose(i);
+}
+
+/*
+ * Destroys the object.
+ * Returns the memory should be freed.
+ */
+package void[] finalize(T)(ref T* p)
+{
+    if (p is null)
+    {
+        return null;
+    }
+    static if (hasElaborateDestructor!T)
+    {
+        destroy(*p);
+    }
+    return (cast(void*) p)[0 .. T.sizeof];
+}
+
+package void[] finalize(T)(ref T p)
+if (isPolymorphicType!T)
+{
+    if (p is null)
+    {
+        return null;
+    }
+    static if (is(T == interface))
+    {
+        version(Windows)
+        {
+            import core.sys.windows.unknwn : IUnknown;
+            static assert(!is(T : IUnknown), "COM interfaces can't be destroyed in "
+                                           ~ __PRETTY_FUNCTION__);
+        }
+        auto ob = cast(Object) p;
+    }
+    else
+    {
+        alias ob = p;
+    }
+    auto ptr = cast(void*) ob;
+    auto support = ptr[0 .. typeid(ob).initializer.length];
+
+    auto ppv = cast(void**) ptr;
+    if (!*ppv)
+    {
+        return null;
+    }
+    auto pc = cast(ClassInfo*) *ppv;
+    scope (exit)
+    {
+        *ppv = null;
+    }
+
+    auto c = *pc;
+    do
+    {
+        // Assume the destructor is @nogc. Leave it nothrow since the destructor
+        // shouldn't throw and if it does, it is an error anyway.
+        if (c.destructor)
+        {
+            alias DtorType = void function(Object) pure nothrow @safe @nogc;
+            (cast(DtorType) c.destructor)(ob);
+        }
+    }
+    while ((c = c.base) !is null);
+
+    if (ppv[1]) // if monitor is not null
+    {
+        _d_monitordelete(cast(Object) ptr, true);
+    }
+    return support;
+}
+
+package void[] finalize(T)(ref T[] p)
+{
+    destroyAllImpl!(T[], T)(p);
+    return p;
+}
+
+/**
+ * Allocates $(D_PSYMBOL OutOfMemoryError) in a static storage and throws it.
+ *
+ * Params:
+ *  msg = Custom error message.
+ *
+ * Throws: $(D_PSYMBOL OutOfMemoryError).
+ */
+void onOutOfMemoryError(string msg = "Out of memory")
+@nogc nothrow pure @trusted
+{
+    static ubyte[stateSize!OutOfMemoryError] memory;
+    alias PureType = OutOfMemoryError function(string) @nogc nothrow pure;
+    throw (cast(PureType) () => emplace!OutOfMemoryError(memory))(msg);
+}
+
+// From druntime
+extern (C)
+private void _d_monitordelete(Object h, bool det) @nogc nothrow pure;
+
+/*
+ * Internal function used to create, resize or destroy a dynamic array. It
+ * may throw $(D_PSYMBOL OutOfMemoryError). The new
+ * allocated part of the array isn't initialized. This function can be trusted
+ * only in the data structures that can ensure that the array is
+ * allocated/rellocated/deallocated with the same allocator.
+ *
+ * Params:
+ *  T         = Element type of the array being created.
+ *  allocator = The allocator used for getting memory.
+ *  array     = A reference to the array being changed.
+ *  length    = New array length.
+ *
+ * Returns: $(D_PARAM array).
+ */
+package(tanya) T[] resize(T)(shared Allocator allocator,
+                             auto ref T[] array,
+                             const size_t length) @trusted
+{
+    if (length == 0)
+    {
+        if (allocator.deallocate(array))
+        {
+            return null;
+        }
+        else
+        {
+            onOutOfMemoryError();
+        }
+    }
+
+    void[] buf = array;
+    if (!allocator.reallocate(buf, length * T.sizeof))
+    {
+        onOutOfMemoryError();
+    }
+    // Casting from void[] is unsafe, but we know we cast to the original type.
+    array = cast(T[]) buf;
+
+    return array;
+}
diff --git a/middle/tanya/memory/lifetime.d b/middle/tanya/memory/lifetime.d
index 9bdc786..50a1b02 100644
--- a/middle/tanya/memory/lifetime.d
+++ b/middle/tanya/memory/lifetime.d
@@ -14,183 +14,10 @@
  */
 module tanya.memory.lifetime;
 
-import tanya.memory : defaultAllocator;
 import tanya.memory.allocator;
 import tanya.meta.metafunction;
 import tanya.meta.trait;
 
-/**
- * Error thrown if memory allocation fails.
- */
-final class OutOfMemoryError : Error
-{
-    /**
-     * Constructs new error.
-     *
-     * Params:
-     *  msg  = The message for the exception.
-     *  file = The file where the exception occurred.
-     *  line = The line number where the exception occurred.
-     *  next = The previous exception in the chain of exceptions, if any.
-     */
-    this(string msg = "Out of memory",
-         string file = __FILE__,
-         size_t line = __LINE__,
-         Throwable next = null) @nogc nothrow pure @safe
-    {
-        super(msg, file, line, next);
-    }
-
-    /// ditto
-    this(string msg,
-         Throwable next,
-         string file = __FILE__,
-         size_t line = __LINE__) @nogc nothrow pure @safe
-    {
-        super(msg, file, line, next);
-    }
-}
-
-/**
- * Allocates $(D_PSYMBOL OutOfMemoryError) in a static storage and throws it.
- *
- * Params:
- *  msg = Custom error message.
- *
- * Throws: $(D_PSYMBOL OutOfMemoryError).
- */
-void onOutOfMemoryError(string msg = "Out of memory")
-@nogc nothrow pure @trusted
-{
-    static ubyte[stateSize!OutOfMemoryError] memory;
-    alias PureType = OutOfMemoryError function(string) @nogc nothrow pure;
-    throw (cast(PureType) () => emplace!OutOfMemoryError(memory))(msg);
-}
-
-// From druntime
-extern (C)
-private void _d_monitordelete(Object h, bool det) @nogc nothrow pure;
-
-/*
- * Internal function used to create, resize or destroy a dynamic array. It
- * may throw $(D_PSYMBOL OutOfMemoryError). The new
- * allocated part of the array isn't initialized. This function can be trusted
- * only in the data structures that can ensure that the array is
- * allocated/rellocated/deallocated with the same allocator.
- *
- * Params:
- *  T         = Element type of the array being created.
- *  allocator = The allocator used for getting memory.
- *  array     = A reference to the array being changed.
- *  length    = New array length.
- *
- * Returns: $(D_PARAM array).
- */
-package(tanya) T[] resize(T)(shared Allocator allocator,
-                             auto ref T[] array,
-                             const size_t length) @trusted
-{
-    if (length == 0)
-    {
-        if (allocator.deallocate(array))
-        {
-            return null;
-        }
-        else
-        {
-            onOutOfMemoryError();
-        }
-    }
-
-    void[] buf = array;
-    if (!allocator.reallocate(buf, length * T.sizeof))
-    {
-        onOutOfMemoryError();
-    }
-    // Casting from void[] is unsafe, but we know we cast to the original type.
-    array = cast(T[]) buf;
-
-    return array;
-}
-
-/*
- * Destroys the object.
- * Returns the memory should be freed.
- */
-package(tanya.memory) void[] finalize(T)(ref T* p)
-{
-    if (p is null)
-    {
-        return null;
-    }
-    static if (hasElaborateDestructor!T)
-    {
-        destroy(*p);
-    }
-    return (cast(void*) p)[0 .. T.sizeof];
-}
-
-package(tanya.memory) void[] finalize(T)(ref T p)
-if (isPolymorphicType!T)
-{
-    if (p is null)
-    {
-        return null;
-    }
-    static if (is(T == interface))
-    {
-        version(Windows)
-        {
-            import core.sys.windows.unknwn : IUnknown;
-            static assert(!is(T : IUnknown), "COM interfaces can't be destroyed in "
-                                           ~ __PRETTY_FUNCTION__);
-        }
-        auto ob = cast(Object) p;
-    }
-    else
-    {
-        alias ob = p;
-    }
-    auto ptr = cast(void*) ob;
-    auto support = ptr[0 .. typeid(ob).initializer.length];
-
-    auto ppv = cast(void**) ptr;
-    if (!*ppv)
-    {
-        return null;
-    }
-    auto pc = cast(ClassInfo*) *ppv;
-    scope (exit)
-    {
-        *ppv = null;
-    }
-
-    auto c = *pc;
-    do
-    {
-        // Assume the destructor is @nogc. Leave it nothrow since the destructor
-        // shouldn't throw and if it does, it is an error anyway.
-        if (c.destructor)
-        {
-            alias DtorType = void function(Object) pure nothrow @safe @nogc;
-            (cast(DtorType) c.destructor)(ob);
-        }
-    }
-    while ((c = c.base) !is null);
-
-    if (ppv[1]) // if monitor is not null
-    {
-        _d_monitordelete(cast(Object) ptr, true);
-    }
-    return support;
-}
-
-package(tanya.memory) void[] finalize(T)(ref T[] p)
-{
-    destroyAllImpl!(T[], T)(p);
-    return p;
-}
-
 package(tanya) void destroyAllImpl(R, E)(R p)
 {
     static if (hasElaborateDestructor!E)
@@ -202,136 +29,6 @@ package(tanya) void destroyAllImpl(R, E)(R p)
     }
 }
 
-/**
- * Destroys and deallocates $(D_PARAM p) of type $(D_PARAM T).
- * It is assumed the respective entities had been allocated with the same
- * allocator.
- *
- * Params:
- *  T         = Type of $(D_PARAM p).
- *  allocator = Allocator the $(D_PARAM p) was allocated with.
- *  p         = Object or array to be destroyed.
- */
-void dispose(T)(shared Allocator allocator, auto ref T p)
-{
-    () @trusted { allocator.deallocate(finalize(p)); }();
-    p = null;
-}
-
-/**
- * Constructs a new class instance of type $(D_PARAM T) using $(D_PARAM args)
- * as the parameter list for the constructor of $(D_PARAM T).
- *
- * Params:
- *  T         = Class type.
- *  A         = Types of the arguments to the constructor of $(D_PARAM T).
- *  allocator = Allocator.
- *  args      = Constructor arguments of $(D_PARAM T).
- *
- * Returns: Newly created $(D_PSYMBOL T).
- *
- * Precondition: $(D_INLINECODE allocator !is null)
- */
-T make(T, A...)(shared Allocator allocator, auto ref A args)
-if (is(T == class))
-in (allocator !is null)
-{
-    auto mem = (() @trusted => allocator.allocate(stateSize!T))();
-    if (mem is null)
-    {
-        onOutOfMemoryError();
-    }
-    scope (failure)
-    {
-        () @trusted { allocator.deallocate(mem); }();
-    }
-
-    return emplace!T(mem[0 .. stateSize!T], args);
-}
-
-/**
- * Constructs a value object of type $(D_PARAM T) using $(D_PARAM args)
- * as the parameter list for the constructor of $(D_PARAM T) and returns a
- * pointer to the new object.
- *
- * Params:
- *  T         = Object type.
- *  A         = Types of the arguments to the constructor of $(D_PARAM T).
- *  allocator = Allocator.
- *  args      = Constructor arguments of $(D_PARAM T).
- *
- * Returns: Pointer to the created object.
- *
- * Precondition: $(D_INLINECODE allocator !is null)
- */
-T* make(T, A...)(shared Allocator allocator, auto ref A args)
-if (!isPolymorphicType!T && !isAssociativeArray!T && !isArray!T)
-in (allocator !is null)
-{
-    auto mem = (() @trusted => allocator.allocate(stateSize!T))();
-    if (mem is null)
-    {
-        onOutOfMemoryError();
-    }
-    scope (failure)
-    {
-        () @trusted { allocator.deallocate(mem); }();
-    }
-    return emplace!T(mem[0 .. stateSize!T], args);
-}
-
-///
-@nogc nothrow pure @safe unittest
-{
-    int* i = defaultAllocator.make!int(5);
-    assert(*i == 5);
-    defaultAllocator.dispose(i);
-}
-
-/**
- * Constructs a new array with $(D_PARAM n) elements.
- *
- * Params:
- *  T         = Array type.
- *  E         = Array element type.
- *  allocator = Allocator.
- *  n         = Array size.
- *
- * Returns: Newly created array.
- *
- * Precondition: $(D_INLINECODE allocator !is null
- *                           && n <= size_t.max / E.sizeof)
- */
-T make(T : E[], E)(shared Allocator allocator, size_t n)
-in (allocator !is null)
-in (n <= size_t.max / E.sizeof)
-{
-    auto ret = allocator.resize!E(null, n);
-
-    static if (hasElaborateDestructor!E)
-    {
-        for (auto range = ret; range.length != 0; range = range[1 .. $])
-        {
-            emplace!E(cast(void[]) range[0 .. 1], E.init);
-        }
-    }
-    else
-    {
-        ret[] = E.init;
-    }
-
-    return ret;
-}
-
-///
-@nogc nothrow pure @safe unittest
-{
-    int[] i = defaultAllocator.make!(int[])(2);
-    assert(i.length == 2);
-    assert(i[0] == int.init && i[1] == int.init);
-    defaultAllocator.dispose(i);
-}
-
 /**
  * Constructs a new object of type $(D_PARAM T) in $(D_PARAM memory) with the
  * given arguments.
@@ -594,11 +291,7 @@ private void deinitialize(bool zero, T)(ref T value)
  * Precondition: `&source !is &target`.
  */
 void moveEmplace(T)(ref T source, ref T target) @system
-in
-{
-    assert(&source !is &target, "Source and target must be different");
-}
-do
+in (&source !is &target, "Source and target must be different")
 {
     static if (is(T == struct) || isStaticArray!T)
     {
diff --git a/middle/tanya/memory/op.d b/middle/tanya/memory/op.d
index 55a0676..e5702a3 100644
--- a/middle/tanya/memory/op.d
+++ b/middle/tanya/memory/op.d
@@ -52,13 +52,9 @@ private enum alignMask = size_t.sizeof - 1;
  * Precondition: $(D_INLINECODE source.length <= target.length).
  */
 void copy(const void[] source, void[] target) @nogc nothrow pure @trusted
-in
-{
-    assert(source.length <= target.length);
-    assert(source.length == 0 || source.ptr !is null);
-    assert(target.length == 0 || target.ptr !is null);
-}
-do
+in (source.length <= target.length)
+in (source.length == 0 || source.ptr !is null)
+in (target.length == 0 || target.ptr !is null)
 {
     version (TanyaNative)
     {
@@ -102,11 +98,7 @@ private template filledBytes(ubyte Byte, ubyte I = 0)
  *  memory = Memory block.
  */
 void fill(ubyte c = 0)(void[] memory) @trusted
-in
-{
-    assert(memory.length == 0 || memory.ptr !is null);
-}
-do
+in (memory.length == 0 || memory.ptr !is null)
 {
     version (TanyaNative)
     {
@@ -152,13 +144,9 @@ do
  * Precondition: $(D_INLINECODE source.length <= target.length).
  */
 void copyBackward(const void[] source, void[] target) @nogc nothrow pure @trusted
-in
-{
-    assert(source.length <= target.length);
-    assert(source.length == 0 || source.ptr !is null);
-    assert(target.length == 0 || target.ptr !is null);
-}
-do
+in (source.length <= target.length)
+in (source.length == 0 || source.ptr !is null)
+in (target.length == 0 || target.ptr !is null)
 {
     version (TanyaNative)
     {
@@ -194,11 +182,7 @@ do
  */
 inout(void[]) find(return inout void[] haystack, ubyte needle)
 @nogc nothrow pure @trusted
-in
-{
-    assert(haystack.length == 0 || haystack.ptr !is null);
-}
-do
+in (haystack.length == 0 || haystack.ptr !is null)
 {
     auto length = haystack.length;
     const size_t needleWord = size_t.max * needle;
@@ -276,11 +260,7 @@ do
  */
 inout(char[]) findNullTerminated(return inout char[] haystack)
 @nogc nothrow pure @trusted
-in
-{
-    assert(haystack.length == 0 || haystack.ptr !is null);
-}
-do
+in (haystack.length == 0 || haystack.ptr !is null)
 {
     auto length = haystack.length;
     enum size_t highBits = filledBytes!(0x01, 0);
@@ -347,12 +327,8 @@ do
  *          $(D_KEYWORD false) otherwise.
  */
 bool equal(const void[] r1, const void[] r2) @nogc nothrow pure @trusted
-in
-{
-    assert(r1.length == 0 || r1.ptr !is null);
-    assert(r2.length == 0 || r2.ptr !is null);
-}
-do
+in (r1.length == 0 || r1.ptr !is null)
+in (r2.length == 0 || r2.ptr !is null)
 {
     version (TanyaNative)
     {
diff --git a/middle/tanya/memory/package.d b/middle/tanya/memory/package.d
index c87eeb9..d2c051a 100644
--- a/middle/tanya/memory/package.d
+++ b/middle/tanya/memory/package.d
@@ -16,117 +16,5 @@ module tanya.memory;
 
 public import tanya.memory.allocator;
 public import tanya.memory.lifetime;
-import tanya.meta.trait;
 deprecated("Use tanya.meta.trait.stateSize instead")
 public import tanya.meta.trait : stateSize;
-
-/**
- * The mixin generates common methods for classes and structs using
- * allocators. It provides a protected member, constructor 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_;
-
-    /**
-     * Params:
-     *  allocator = The allocator should be used.
-     *
-     * Precondition: $(D_INLINECODE allocator_ !is null)
-     */
-    this(shared Allocator allocator) @nogc nothrow pure @safe
-    in (allocator !is null)
-    {
-        this.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.
-     *
-     * Postcondition: $(D_INLINECODE allocator !is null)
-     */
-    @property shared(Allocator) allocator() @nogc nothrow pure @safe
-    out (allocator; allocator !is null)
-    {
-        if (allocator_ is null)
-        {
-            allocator_ = defaultAllocator;
-        }
-        return allocator_;
-    }
-
-    /// ditto
-    @property shared(Allocator) allocator() const @nogc nothrow pure @trusted
-    out (allocator; allocator !is null)
-    {
-        if (allocator_ is null)
-        {
-            return defaultAllocator;
-        }
-        return cast(shared Allocator) allocator_;
-    }
-}
-
-shared Allocator allocator;
-
-private shared(Allocator) getAllocatorInstance() @nogc nothrow
-{
-    if (allocator is null)
-    {
-        version (TanyaNative)
-        {
-            import tanya.memory.mmappool;
-            defaultAllocator = MmapPool.instance;
-        }
-        else
-        {
-            import tanya.memory.mallocator;
-            defaultAllocator = Mallocator.instance;
-        }
-    }
-    return allocator;
-}
-
-/**
- * Returns: Default allocator.
- *
- * Postcondition: $(D_INLINECODE allocator !is null).
- */
-@property shared(Allocator) defaultAllocator() @nogc nothrow pure @trusted
-out (allocator; allocator !is null)
-{
-    return (cast(GetPureInstance!Allocator) &getAllocatorInstance)();
-}
-
-/**
- * Sets the default allocator.
- *
- * Params:
- *  allocator = $(D_PSYMBOL Allocator) instance.
- *
- * Precondition: $(D_INLINECODE allocator !is null).
- */
-@property void defaultAllocator(shared(Allocator) allocator) @nogc nothrow @safe
-in (allocator !is null)
-{
-    .allocator = allocator;
-}
-
-/**
- * Params:
- *  size      = Raw size.
- *  alignment = Alignment.
- *
- * Returns: Aligned size.
- */
-size_t alignedSize(const size_t size, const size_t alignment = 8)
-pure nothrow @safe @nogc
-{
-    return (size - 1) / alignment * alignment + alignment;
-}
diff --git a/middle/tanya/memory/smartref.d b/middle/tanya/memory/smartref.d
index 953513e..ddde63b 100644
--- a/middle/tanya/memory/smartref.d
+++ b/middle/tanya/memory/smartref.d
@@ -23,7 +23,8 @@
  */
 module tanya.memory.smartref;
 
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 
 private template Payload(T)
diff --git a/source/tanya/async/event/epoll.d b/source/tanya/async/event/epoll.d
index 718e5e8..291950e 100644
--- a/source/tanya/async/event/epoll.d
+++ b/source/tanya/async/event/epoll.d
@@ -5,7 +5,7 @@
 /**
  * Event loop implementation for Linux.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -30,7 +30,7 @@ import tanya.async.protocol;
 import tanya.async.transport;
 import tanya.async.watcher;
 import tanya.container.array;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 
 extern (C) nothrow @nogc
diff --git a/source/tanya/async/event/iocp.d b/source/tanya/async/event/iocp.d
index acd37a5..a32e04c 100644
--- a/source/tanya/async/event/iocp.d
+++ b/source/tanya/async/event/iocp.d
@@ -5,7 +5,7 @@
 /**
  * Event loop implementation for Windows.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -26,7 +26,7 @@ import tanya.async.protocol;
 import tanya.async.transport;
 import tanya.async.watcher;
 import tanya.container.buffer;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 import tanya.sys.windows.winbase;
 
diff --git a/source/tanya/async/event/kqueue.d b/source/tanya/async/event/kqueue.d
index 683befa..563601a 100644
--- a/source/tanya/async/event/kqueue.d
+++ b/source/tanya/async/event/kqueue.d
@@ -5,7 +5,7 @@
 /*
  * Event loop implementation for *BSD.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -58,7 +58,7 @@ import tanya.async.loop;
 import tanya.async.transport;
 import tanya.async.watcher;
 import tanya.container.array;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 
 void EV_SET(kevent_t* kevp, typeof(kevent_t.tupleof) args) pure nothrow @nogc
diff --git a/source/tanya/async/event/selector.d b/source/tanya/async/event/selector.d
index 9e83261..1cc4515 100644
--- a/source/tanya/async/event/selector.d
+++ b/source/tanya/async/event/selector.d
@@ -5,7 +5,7 @@
 /*
  * This module contains base implementations for reactor event loops.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -25,7 +25,7 @@ import tanya.async.transport;
 import tanya.async.watcher;
 import tanya.container.array;
 import tanya.container.buffer;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 
 /**
diff --git a/source/tanya/async/iocp.d b/source/tanya/async/iocp.d
index 2887c4a..26c99fe 100644
--- a/source/tanya/async/iocp.d
+++ b/source/tanya/async/iocp.d
@@ -7,7 +7,7 @@
  *
  * Note: Available only on Windows.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/loop.d b/source/tanya/async/loop.d
index 3fba090..2c13397 100644
--- a/source/tanya/async/loop.d
+++ b/source/tanya/async/loop.d
@@ -62,7 +62,7 @@
  * }
  * ---
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -77,7 +77,7 @@ import tanya.async.watcher;
 import tanya.bitmanip;
 import tanya.container.buffer;
 import tanya.container.list;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 
 version (DisableBackends)
diff --git a/source/tanya/async/package.d b/source/tanya/async/package.d
index 140206e..ef30b2d 100644
--- a/source/tanya/async/package.d
+++ b/source/tanya/async/package.d
@@ -5,7 +5,7 @@
 /**
  * This package provides asynchronous capabilities.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/protocol.d b/source/tanya/async/protocol.d
index 2795c16..035afaa 100644
--- a/source/tanya/async/protocol.d
+++ b/source/tanya/async/protocol.d
@@ -9,7 +9,7 @@
  * When an event from the network arrives, a protocol method gets
  * called and can respond to the event.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/transport.d b/source/tanya/async/transport.d
index 108a295..c516ae2 100644
--- a/source/tanya/async/transport.d
+++ b/source/tanya/async/transport.d
@@ -6,7 +6,7 @@
  * This module contains transports which are responsible for data dilvery
  * between two parties of an asynchronous communication.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/async/watcher.d b/source/tanya/async/watcher.d
index b257b5b..9feb1df 100644
--- a/source/tanya/async/watcher.d
+++ b/source/tanya/async/watcher.d
@@ -5,7 +5,7 @@
 /**
  * Watchers register user's interest in some event.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -19,7 +19,7 @@ import tanya.async.protocol;
 import tanya.async.transport;
 import tanya.container.buffer;
 import tanya.container.list;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.network.socket;
 
 /**
diff --git a/source/tanya/container/array.d b/source/tanya/container/array.d
index 1bad819..0afd2ac 100644
--- a/source/tanya/container/array.d
+++ b/source/tanya/container/array.d
@@ -17,7 +17,8 @@ module tanya.container.array;
 import core.checkedint;
 import tanya.algorithm.comparison;
 import tanya.algorithm.mutation;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range;
diff --git a/source/tanya/container/buffer.d b/source/tanya/container/buffer.d
index 1bb0c4d..c5e8327 100644
--- a/source/tanya/container/buffer.d
+++ b/source/tanya/container/buffer.d
@@ -14,7 +14,7 @@
  */
 module tanya.container.buffer;
 
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.meta.trait;
 
 version (unittest)
diff --git a/source/tanya/container/hashtable.d b/source/tanya/container/hashtable.d
index 4df8af0..f458ca5 100644
--- a/source/tanya/container/hashtable.d
+++ b/source/tanya/container/hashtable.d
@@ -18,7 +18,8 @@ import tanya.algorithm.mutation;
 import tanya.container.array;
 import tanya.container.entry;
 import tanya.hash.lookup;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range.primitive;
diff --git a/source/tanya/container/list.d b/source/tanya/container/list.d
index bb1870c..279ebc4 100644
--- a/source/tanya/container/list.d
+++ b/source/tanya/container/list.d
@@ -17,7 +17,8 @@ module tanya.container.list;
 
 import tanya.algorithm.comparison;
 import tanya.container.entry;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range.array;
diff --git a/source/tanya/container/set.d b/source/tanya/container/set.d
index 3c9c362..7bfa6aa 100644
--- a/source/tanya/container/set.d
+++ b/source/tanya/container/set.d
@@ -18,7 +18,8 @@ module tanya.container.set;
 import tanya.container.array;
 import tanya.container.entry;
 import tanya.hash.lookup;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range.primitive;
diff --git a/source/tanya/container/string.d b/source/tanya/container/string.d
index 4263b1c..383ee7c 100644
--- a/source/tanya/container/string.d
+++ b/source/tanya/container/string.d
@@ -29,7 +29,8 @@ module tanya.container.string;
 import tanya.algorithm.comparison;
 import tanya.algorithm.mutation;
 import tanya.hash.lookup;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range.array;
diff --git a/source/tanya/conv.d b/source/tanya/conv.d
index 13e9235..2efeda2 100644
--- a/source/tanya/conv.d
+++ b/source/tanya/conv.d
@@ -15,7 +15,7 @@
 module tanya.conv;
 
 import tanya.container.string;
-import tanya.memory;
+import tanya.memory.allocator;
 deprecated("Use tanya.memory.lifetime.emplace instead")
 public import tanya.memory.lifetime : emplace;
 import tanya.meta.trait;
@@ -64,12 +64,8 @@ if (isInputRange!R
  && isSomeChar!(ElementType!R)
  && isIntegral!T
  && isUnsigned!T)
-in
-{
-    assert(base >= 2);
-    assert(base <= 36);
-}
-do
+in (base >= 2)
+in (base <= 36)
 {
     T boundary = cast(T) (T.max / base);
     if (range.empty)
diff --git a/source/tanya/exception.d b/source/tanya/exception.d
index b65efd1..e8b94af 100644
--- a/source/tanya/exception.d
+++ b/source/tanya/exception.d
@@ -10,7 +10,7 @@
  * Source: $(LINK2 https://github.com/caraus-ecms/tanya/blob/master/source/tanya/exception.d,
  *                 tanya/exception.d)
  */
-deprecated("Use tanya.memory.lifetimeinstead")
+deprecated("Use tanya.memory.allocator instead")
 module tanya.exception;
 
-public import tanya.memory.lifetime : onOutOfMemoryError, OutOfMemoryError;
+public import tanya.memory.allocator : onOutOfMemoryError, OutOfMemoryError;
diff --git a/source/tanya/format.d b/source/tanya/format.d
index 5c63a5e..806fc1f 100644
--- a/source/tanya/format.d
+++ b/source/tanya/format.d
@@ -1175,11 +1175,7 @@ private struct uint128
     }
 
     Tuple!(uint128, uint128) divMod(ulong rhs) const @nogc nothrow pure @safe
-    in
-    {
-        assert(rhs != uint128(), "Division by 0");
-    }
-    do
+    in (rhs != uint128(), "Division by 0")
     {
         if (rhs == 1)
         {
@@ -1279,11 +1275,7 @@ private int indexMismatch(ulong low, ulong high) @nogc nothrow pure @safe
 private char[] errol2(double value,
                       return ref char[512] buffer,
                       out int exponent) @nogc nothrow pure @safe
-in
-{
-    assert(value > 9.007199254740992e15 && value < 3.40282366920938e38);
-}
-do
+in (value > 9.007199254740992e15 && value < 3.40282366920938e38)
 {
     auto v = uint128(value);
     auto leftBoundary = v + raise2ToExp((value - previous(value)) / 2.0);
@@ -1368,11 +1360,7 @@ do
 private char[] errolFixed(double value,
                           return ref char[512] buffer,
                           out int exponent) @nogc nothrow pure @safe
-in
-{
-    assert(value >= 16.0 && value <= 9.007199254740992e15);
-}
-do
+in (value >= 16.0 && value <= 9.007199254740992e15)
 {
     auto decimal = cast(ulong) value;
     auto n = cast(double) decimal;
diff --git a/source/tanya/math/mp.d b/source/tanya/math/mp.d
index 88a3fe6..f47177d 100644
--- a/source/tanya/math/mp.d
+++ b/source/tanya/math/mp.d
@@ -19,7 +19,8 @@ import tanya.algorithm.iteration;
 import tanya.algorithm.mutation;
 import tanya.container.array;
 import tanya.encoding.ascii;
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.meta.transform;
 import tanya.range;
diff --git a/source/tanya/math/random.d b/source/tanya/math/random.d
index 7423c23..8974d7b 100644
--- a/source/tanya/math/random.d
+++ b/source/tanya/math/random.d
@@ -14,7 +14,7 @@
  */
 module tanya.math.random;
 
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.typecons;
 
 /// Maximum amount gathered from the entropy sources.
diff --git a/source/tanya/net/uri.d b/source/tanya/net/uri.d
index 00db019..6e72b45 100644
--- a/source/tanya/net/uri.d
+++ b/source/tanya/net/uri.d
@@ -16,7 +16,7 @@ module tanya.net.uri;
 
 import tanya.conv;
 import tanya.encoding.ascii;
-import tanya.memory;
+import tanya.memory.allocator;
 
 /**
  * Thrown if an invalid URI was specified.
diff --git a/source/tanya/network/package.d b/source/tanya/network/package.d
index 185d27c..6437845 100644
--- a/source/tanya/network/package.d
+++ b/source/tanya/network/package.d
@@ -5,7 +5,7 @@
 /**
  * Network programming.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/source/tanya/network/socket.d b/source/tanya/network/socket.d
index 1b2d058..2bcab68 100644
--- a/source/tanya/network/socket.d
+++ b/source/tanya/network/socket.d
@@ -41,7 +41,7 @@
  * For an example of an asynchronous server refer to the documentation of the
  * $(D_PSYMBOL tanya.async.loop) module.
  *
- * Copyright: Eugene Wissner 2016-2018.
+ * Copyright: Eugene Wissner 2016-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -55,7 +55,7 @@ import core.time;
 public import std.socket : SocketOption, SocketOptionLevel;
 import tanya.algorithm.comparison;
 import tanya.bitmanip;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.meta.trait;
 import tanya.os.error;
 
diff --git a/source/tanya/typecons.d b/source/tanya/typecons.d
index 507cd3c..02f5e72 100644
--- a/source/tanya/typecons.d
+++ b/source/tanya/typecons.d
@@ -296,11 +296,7 @@ struct Option(T)
     /// ditto
     bool opEquals(U)(auto ref const U that) const
     if (ifTestable!(U, a => a == T.init) && !is(U == Option))
-    in
-    {
-        assert(!isNothing);
-    }
-    do
+    in (!isNothing)
     {
         return get == that;
     }
diff --git a/test/tanya/test/assertion.d b/test/tanya/test/assertion.d
index 10105d7..daef334 100644
--- a/test/tanya/test/assertion.d
+++ b/test/tanya/test/assertion.d
@@ -13,7 +13,7 @@
  * The functions can cause segmentation fault if the module is compiled
  * in production mode and the condition fails.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
@@ -22,7 +22,7 @@
  */
 module tanya.test.assertion;
 
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.meta.trait;
 
 /**
diff --git a/test/tanya/test/package.d b/test/tanya/test/package.d
index ab6f861..f924833 100644
--- a/test/tanya/test/package.d
+++ b/test/tanya/test/package.d
@@ -5,7 +5,7 @@
 /**
  * Test suite for $(D_KEYWORD unittest)-blocks.
  *
- * Copyright: Eugene Wissner 2017-2018.
+ * Copyright: Eugene Wissner 2017-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/test/tanya/test/stub.d b/test/tanya/test/stub.d
index e1f8dcb..8756f95 100644
--- a/test/tanya/test/stub.d
+++ b/test/tanya/test/stub.d
@@ -5,7 +5,7 @@
 /**
  * Range and generic type generators.
  *
- * Copyright: Eugene Wissner 2018.
+ * Copyright: Eugene Wissner 2018-2019.
  * License: $(LINK2 https://www.mozilla.org/en-US/MPL/2.0/,
  *                  Mozilla Public License, v. 2.0).
  * Authors: $(LINK2 mailto:info@caraus.de, Eugene Wissner)
diff --git a/tests/tanya/async/tests/loop.d b/tests/tanya/async/tests/loop.d
index 60841b1..afee3bf 100644
--- a/tests/tanya/async/tests/loop.d
+++ b/tests/tanya/async/tests/loop.d
@@ -6,7 +6,7 @@ module tanya.async.tests.loop;
 import core.time;
 import tanya.async.loop;
 import tanya.async.watcher;
-import tanya.memory;
+import tanya.memory.allocator;
 
 private final class DummyWatcher : Watcher
 {
diff --git a/tests/tanya/container/tests/array.d b/tests/tanya/container/tests/array.d
index f551fb9..c8fb914 100644
--- a/tests/tanya/container/tests/array.d
+++ b/tests/tanya/container/tests/array.d
@@ -5,7 +5,7 @@ module tanya.container.tests.array;
 
 import tanya.algorithm.comparison;
 import tanya.container.array;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.test.stub;
 
 // const arrays return usable ranges
diff --git a/tests/tanya/container/tests/set.d b/tests/tanya/container/tests/set.d
index 187869f..67259d9 100644
--- a/tests/tanya/container/tests/set.d
+++ b/tests/tanya/container/tests/set.d
@@ -4,7 +4,7 @@
 module tanya.container.tests.set;
 
 import tanya.container.set;
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.test.stub;
 
 // Basic insertion logic.
diff --git a/tests/tanya/math/tests/random.d b/tests/tanya/math/tests/random.d
index 85ae3d0..2fe9f91 100644
--- a/tests/tanya/math/tests/random.d
+++ b/tests/tanya/math/tests/random.d
@@ -4,7 +4,7 @@
 module tanya.math.tests.random;
 
 import tanya.math.random;
-import tanya.memory;
+import tanya.memory.allocator;
 
 static if (is(PlatformEntropySource)) @nogc @system unittest
 {
diff --git a/tests/tanya/memory/tests/lifetime.d b/tests/tanya/memory/tests/lifetime.d
index ff7020c..332b3d2 100644
--- a/tests/tanya/memory/tests/lifetime.d
+++ b/tests/tanya/memory/tests/lifetime.d
@@ -3,7 +3,8 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 module tanya.memory.tests.lifetime;
 
-import tanya.memory;
+import tanya.memory.allocator;
+import tanya.memory.lifetime;
 import tanya.test.stub;
 
 @nogc nothrow pure @safe unittest
diff --git a/tests/tanya/memory/tests/smartref.d b/tests/tanya/memory/tests/smartref.d
index ced8553..63308d8 100644
--- a/tests/tanya/memory/tests/smartref.d
+++ b/tests/tanya/memory/tests/smartref.d
@@ -3,7 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 module tanya.memory.tests.smartref;
 
-import tanya.memory;
+import tanya.memory.allocator;
 import tanya.memory.smartref;
 import tanya.meta.trait;
 import tanya.test.stub;
diff --git a/tests/tanya/tests/format.d b/tests/tanya/tests/format.d
index b4a019d..f080a67 100644
--- a/tests/tanya/tests/format.d
+++ b/tests/tanya/tests/format.d
@@ -175,7 +175,7 @@ import tanya.range;
 // Aggregate types
 @system unittest // Object.toString has no attributes.
 {
-    import tanya.memory;
+    import tanya.memory.allocator;
     import tanya.memory.smartref;
 
     interface I