Initial commit of library files.

.gitignore

@@ -0,0 +1 @@
+tests/unittest-cpp

CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required(VERSION 3.2.2)
+
+project(GSL)
+
+include_directories(
+    ${CMAKE_CURRENT_BINARY_DIR}
+)
+
+enable_testing()
+
+add_subdirectory(tests)

LICENSE

@@ -0,0 +1,11 @@
+Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+ 
+This code is licensed under the MIT License (MIT). 
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+THE SOFTWARE. 

README.md

@@ -1,2 +1,62 @@
-# GSL
+# GSL: Guidelines Support Library
-Guidelines Support Library
+
+This library contains functions and types that are suggested for use by the
+[C++ Coding Guidelines](https://github.com/Microsoft/CppCodingStandards/).
+
+These include types like `array_view<>`, `string_view<>`, `owner<>` and others.
+
+The entire implementation is provided inline in the headers under the [include](./include) directory.
+
+While some types have been broken out into their own headers (e.g. [include/array_view.h](./include/array_view.h)),
+it is simplest to just include [gsl.h](./include/gsl.h) and gain access to the entire library.
+
+> NOTE: We encourage contributions that improve or refine any of the types in this library.
+
+# Quick Start
+## Supported Platforms
+The test suite that exercises GSL has been built and passes successfully on the following platforms:
+
+* Windows using Visual Studio 2013
+* Windows using Visual Studio 2015
+* Windows using Clang\LLVM 3.6
+* Windows using GCC 5.1
+* Linux using Clang\LLVM 3.6
+* Linux using GCC 5.1
+
+> If you successfully port GSL to another platform, we would love to hear from you. Please consider contributing
+any changes that were necessary back to this project to benefit the wider community. 
+
+## Building the tests
+To build the tests, you will require the following:
+
+* [CMake](http://cmake.org), version 3.3 or later to be installed and in your PATH.
+* [UnitTest-cpp](https://github.com/Microsoft/unittest-cpp), to be cloned under the [tests/unittest-cpp](./tests/unittest-cpp) directory
+of your GSL source.
+
+These steps assume the source code of this repository has been cloned into a directory named `c:\GSL`.
+
+1. Create a directory to contain the build outputs for a particular architecture (we name it c:\GSL\vs14-x86 in this example).
+
+        cd GSL
+        md build-x86
+        cd build-x86
+
+2. Configure CMake to use the compiler of your choice (you can see a list by running `cmake --help`).
+    
+        cmake -G "Visual Studio 14 2015" c:\GSL
+    
+3. Build the test suite (in this case, in the Debug configuration, Release is another good choice).    
+
+        cmake --build . --config Debug
+ 
+4. Run the test suite.    
+
+        ctest -C Debug
+
+All tests should pass - indicating your platform is fully supported and you are ready to use the GSL types!
+
+## Using the libraries
+As the types are entirely implemented inline in headers, there are no linking requirements.
+
+Just place the contents of the [include](./include) directory within your source tree so it is available
+to your compiler, then include the appropriate headers in your program, and away you go!

include/fail_fast.h

@@ -0,0 +1,39 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include <exception>
+
+namespace Guide
+{
+
+//
+// Having "fail fast" result in an exception makes unit testing
+// the GSL classes that rely upon it much simpler. 
+//
+#if defined(SAFER_CPP_TESTING)
+
+struct fail_fast : public std::exception {};
+inline void fail_fast_assert(bool cond) { if (!cond) throw fail_fast(); }
+
+#else
+
+inline void fail_fast_assert(bool cond) { if (!cond) std::terminate(); }
+
+#endif // SAFER_CPP_TESTING
+
+}

include/gsl.h

@@ -0,0 +1,284 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "array_view.h"     // array_view, strided_array_view...
+#include "string_view.h"    // zstring, string_view, zstring_builder...
+#include <memory>
+
+namespace Guide
+{
+
+//
+// GSL.owner: ownership pointers 
+//
+using std::unique_ptr;
+using std::shared_ptr;
+
+//
+// GSL.assert: assertions
+//
+#define Expects(x)  Guide::fail_fast_assert((x))
+#define Ensures(x)  Guide::fail_fast_assert((x))
+
+//
+// GSL.util: utilities
+//
+
+// Final_act allows you to ensure something gets run at the end of a scope
+template <class F>
+class Final_act
+{
+public:
+    explicit Final_act(F f) : f_(f) {}
+    
+    Final_act(const Final_act&& other) : f_(other.f_) {}
+    Final_act(const Final_act&) = delete;
+    Final_act& operator=(const Final_act&) = delete;
+    
+    ~Final_act() { f_(); }
+
+private:
+    F f_;
+};
+
+// finally() - convenience function to generate a Final_act
+template <class F>
+Final_act<F> finally(F f) { return Final_act<F>(f); }
+
+// narrow_cast(): a searchable way to do narrowing casts of values
+template<class T, class U>
+T narrow_cast(U u) { return static_cast<T>(u); }
+
+struct narrowing_error : public std::exception {};
+// narrow() : a checked version of narrow_cast() that throws if the cast changed the value
+template<class T, class U>
+T narrow(U u) { T t = narrow_cast<T>(u); if (static_cast<U>(t) != u) throw narrowing_error(); return t; }
+
+//
+// at() - Bounds-checked way of accessing static arrays, std::array, std::vector
+//
+template <class T, size_t N>
+T& at(T(&arr)[N], size_t index) { fail_fast_assert(index < N); return arr[index]; }
+
+template <class T, size_t N>
+T& at(std::array<T, N>& arr, size_t index) { fail_fast_assert(index < N); return arr[index]; }
+
+template <class Cont>
+typename Cont::value_type& at(Cont& cont, size_t index) { fail_fast_assert(index < cont.size()); return cont[index]; }
+
+
+//
+// not_null
+//
+// Restricts a pointer or smart pointer to only hold non-null values.
+// 
+// Has zero size overhead over T.
+//
+// If T is a pointer (i.e. T == U*) then 
+// - allow construction from U* or U& 
+// - disallow construction from nullptr_t
+// - disallow default construction
+// - ensure construction from U* fails with nullptr
+// - allow implicit conversion to U*
+//
+template<class T>
+class not_null
+{
+public:
+    not_null(T t) : ptr_(t) { ensure_invariant(); }
+
+    // deleting these two prevents compilation when initialized with a nullptr or literal 0
+    not_null(std::nullptr_t) = delete;
+    not_null(int) = delete;
+
+    not_null(const not_null &other) = default;
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    not_null(const not_null<U> &other) : ptr_(other.get())
+    {
+    }
+
+    not_null<T>& operator=(const T& t) { ptr_ = t; ensure_invariant(); return *this; }
+
+    // prevents compilation when someone attempts to assign a nullptr 
+    not_null<T>& operator=(std::nullptr_t) = delete;
+	not_null<T>& operator=(int) = delete;
+    
+    T get() const {
+#ifdef _MSC_VER
+        __assume(ptr_ != nullptr);
+#endif
+        return ptr_;
+    } // the assume() should help the optimizer
+
+    operator T() const {  return get(); }
+    T operator->() const { return get(); }
+
+	bool operator==(const T& rhs) const { return ptr_ == rhs; }
+	bool operator!=(const T& rhs) const { return !(*this == rhs); }
+private:
+    T ptr_;
+
+    // we assume that the compiler can hoist/prove away most of the checks inlined from this function
+    // if not, we could make them optional via conditional compilation
+    void ensure_invariant() const { fail_fast_assert(ptr_ != nullptr); }
+
+    // unwanted operators...pointers only point to single objects!
+    // TODO ensure all arithmetic ops on this type are unavailable
+    not_null<T>& operator++() = delete;
+    not_null<T>& operator--() = delete;
+    not_null<T> operator++(int) = delete;
+    not_null<T> operator--(int) = delete;
+    not_null<T>& operator+(size_t) = delete;
+    not_null<T>& operator+=(size_t) = delete;
+    not_null<T>& operator-(size_t) = delete;
+    not_null<T>& operator-=(size_t) = delete;
+};
+
+
+// 
+// maybe_null
+//
+// Describes an optional pointer - provides symmetry with not_null
+//
+template<class T>
+class maybe_null_dbg
+{
+public:
+    maybe_null_dbg() : ptr_(nullptr), tested_(false) {}
+
+    maybe_null_dbg(const T& p) : ptr_(p), tested_(false) {}
+    maybe_null_dbg(const maybe_null_dbg& rhs) : ptr_(rhs.ptr_), tested_(false) {}
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    maybe_null_dbg(const not_null<U> &other) : ptr_(other.get()), tested_(false)
+    {
+    }
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    maybe_null_dbg(const maybe_null_dbg<U> &other) : ptr_(other.get()), tested_(false)
+    {
+    }
+
+    maybe_null_dbg& operator=(const T& p)
+    {
+        if (ptr_ != p)
+        {
+            ptr_ = p;
+            tested_ = false;
+        }
+        return *this;
+    }
+
+    maybe_null_dbg& operator=(const maybe_null_dbg& rhs)
+    {
+        if (this != &rhs)
+        {
+            ptr_ = rhs.ptr_;
+            tested_ = false;
+        }
+        return *this;
+    }
+
+    bool present() const { tested_ = true; return ptr_ != nullptr; }
+
+    bool operator==(const T& rhs) const { tested_ = true; return ptr_ == rhs; }
+    bool operator!=(const T& rhs) const { return !(*this == rhs); }
+
+    T get() const {
+        fail_fast_assert(tested_);
+#ifdef _MSC_VER
+        __assume(ptr_ != nullptr);
+#endif
+        return ptr_; 
+    }
+
+    operator T() const { return get(); }
+    T operator->() const { return get(); }
+
+private:
+    const size_t ptee_size_ = sizeof(*ptr_);  // T must be a pointer type
+
+    // unwanted operators...pointers only point to single objects!
+    // TODO ensure all arithmetic ops on this type are unavailable
+    maybe_null_dbg<T>& operator++() = delete;
+    maybe_null_dbg<T>& operator--() = delete;
+    maybe_null_dbg<T> operator++(int) = delete;
+    maybe_null_dbg<T> operator--(int) = delete;
+    maybe_null_dbg<T>& operator+(size_t) = delete;
+    maybe_null_dbg<T>& operator+=(size_t) = delete;
+    maybe_null_dbg<T>& operator-(size_t) = delete;
+    maybe_null_dbg<T>& operator-=(size_t) = delete;
+
+    T ptr_;
+    mutable bool tested_;
+};
+
+template<class T>
+class maybe_null_ret
+{
+public:
+    maybe_null_ret() : ptr_(nullptr) {}
+    maybe_null_ret(std::nullptr_t) : ptr_(nullptr) {}
+    maybe_null_ret(const T& p) : ptr_(p) {}
+    maybe_null_ret(const maybe_null_ret& rhs) = default;
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    maybe_null_ret(const not_null<U> &other) : ptr_(other.get())
+    {
+    }
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    maybe_null_ret(const maybe_null_ret<U> &other) : ptr_(other.get())
+    {
+    }
+
+    template <typename U, typename Dummy = std::enable_if_t<std::is_convertible<U, T>::value>>
+    maybe_null_ret(const maybe_null_dbg<U> &other) : ptr_(other.get())
+    {
+    }
+
+    maybe_null_ret& operator=(const T& p) { if (ptr_ != p) { ptr_ = p; } return *this; }
+    maybe_null_ret& operator=(const maybe_null_ret& rhs) = default;
+
+    bool present() const { return ptr_ != nullptr; }
+
+    T get() const { return ptr_; }
+
+    operator T() const { return get(); }
+    T operator->() const { return get(); }
+
+private:
+    // unwanted operators...pointers only point to single objects!
+    // TODO ensure all arithmetic ops on this type are unavailable
+    maybe_null_ret<T>& operator++() = delete;
+    maybe_null_ret<T>& operator--() = delete;
+    maybe_null_ret<T> operator++(int) = delete;
+    maybe_null_ret<T> operator--(int) = delete;
+    maybe_null_ret<T>& operator+(size_t) = delete;
+    maybe_null_ret<T>& operator+=(size_t) = delete;
+    maybe_null_ret<T>& operator-(size_t) = delete;
+    maybe_null_ret<T>& operator-=(size_t) = delete;
+
+    const size_t ptee_size_ = sizeof(*ptr_);  // T must be a pointer type
+    T ptr_;
+};
+
+template<class T> using maybe_null = maybe_null_ret<T>;
+
+} // namespace Guide

include/string_view.h

@@ -0,0 +1,178 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#pragma once
+
+#include "array_view.h"
+#include <cstring>
+
+namespace Guide
+{
+//
+// czstring and wzstring
+//
+// These are "tag" typedef's for C-style strings (i.e. null-terminated character arrays) 
+// that allow static analysis to help find bugs.
+//
+// There are no additional features/semantics that we can find a way to add inside the
+// type system for these types that will not either incur significant runtime costs or
+// (sometimes needlessly) break existing programs when introduced.
+//
+template<size_t Max = dynamic_range>
+using czstring = const char*;
+
+template<size_t Max = dynamic_range>
+using cwzstring = const wchar_t*;
+
+template<size_t Max = dynamic_range>
+using zstring = char*;
+
+template<size_t Max = dynamic_range>
+using wzstring = wchar_t*;
+
+//
+// string_view and relatives
+//
+// Note that Extent is always single-dimension only
+// Note that SizeType is defaulted to be smaller than size_t which is the array_view default
+//
+// TODO (neilmac) once array_view regains configurable size_type, update these typedef's
+//
+template <class CharT, size_t Extent = dynamic_range>
+using basic_string_view = array_view<CharT, Extent>;
+
+template<size_t Extent = dynamic_range>
+using string_view = basic_string_view<char, Extent>;
+
+template<size_t Extent = dynamic_range>
+using cstring_view = basic_string_view<const char, Extent>;
+
+template<size_t Extent = dynamic_range>
+using wstring_view = basic_string_view<wchar_t, Extent>;
+
+template<size_t Extent = dynamic_range>
+using cwstring_view = basic_string_view<const wchar_t, Extent>;
+
+
+//
+// ensure_sentinel() 
+//
+// Provides a way to obtain an array_view from a contiguous sequence
+// that ends with a (non-inclusive) sentinel value.
+//
+// Will fail-fast if sentinel cannot be found before max elements are examined.
+//
+template<class T, class SizeType, const T Sentinel>
+array_view<T, dynamic_range> ensure_sentinel(const T* seq, SizeType max = std::numeric_limits<SizeType>::max())
+{
+    auto cur = seq;
+    while ((cur - seq) < max && *cur != Sentinel) ++cur;
+    fail_fast_assert(*cur == Sentinel);
+    return{ seq, cur - seq };
+}
+
+
+//
+// ensure_z - creates a string_view for a czstring or cwzstring.
+// Will fail fast if a null-terminator cannot be found before
+// the limit of size_type.
+//
+template<class T>
+inline basic_string_view<T, dynamic_range> ensure_z(T* const & sz, size_t max = std::numeric_limits<size_t>::max())
+{
+    return ensure_sentinel<0>(sz, max);
+}
+
+// TODO (neilmac) there is probably a better template-magic way to get the const and non-const overloads to share an implementation
+inline basic_string_view<char, dynamic_range> ensure_z(char* const & sz, size_t max)
+{
+    auto len = strnlen(sz, max);
+    fail_fast_assert(sz[len] == 0); return{ sz, len };
+}
+
+inline basic_string_view<const char, dynamic_range> ensure_z(const char* const& sz, size_t max)
+{
+    auto len = strnlen(sz, max);
+    fail_fast_assert(sz[len] == 0); return{ sz, len };
+}
+
+inline basic_string_view<wchar_t, dynamic_range> ensure_z(wchar_t* const & sz, size_t max)
+{
+    auto len = wcsnlen(sz, max);
+    fail_fast_assert(sz[len] == 0); return{ sz, len };
+}
+
+inline basic_string_view<const wchar_t, dynamic_range> ensure_z(const wchar_t* const & sz, size_t max)
+{
+    auto len = wcsnlen(sz, max);
+    fail_fast_assert(sz[len] == 0); return{ sz, len };
+}
+
+template<class T, size_t N>
+basic_string_view<T, dynamic_range> ensure_z(T(&sz)[N]) { return ensure_z(&sz[0], N); }
+
+template<class Cont>
+basic_string_view<typename std::remove_pointer<typename Cont::pointer>::type, dynamic_range> ensure_z(Cont& cont)
+{
+    return ensure_z(cont.data(), cont.length());
+}
+
+//
+// to_string() allow (explicit) conversions from string_view to string
+//
+template<class CharT, size_t Extent>
+std::basic_string<typename std::remove_const<CharT>::type> to_string(const basic_string_view<CharT, Extent>& view)
+{
+    return{ view.data(), view.length() };
+}
+
+
+template<class CharT, size_t Extent = dynamic_range>
+class basic_zstring_builder
+{
+public:
+    using string_view_type = basic_string_view<CharT, Extent>;
+    using value_type = CharT;
+    using pointer = CharT*;
+    using size_type = typename string_view_type::size_type;
+    using iterator = typename string_view_type::iterator;
+
+    basic_zstring_builder(CharT* data, size_type length) : sv_(data, length) {}
+
+    template<size_t Size>
+    basic_zstring_builder(CharT(&arr)[Size]) : sv_(arr) {}
+
+    pointer data() const { return sv_.data(); }
+    string_view_type view() const { return sv_; }
+
+    size_type length() const { return sv_.length(); }
+
+    pointer assume0() const { return data(); }
+    string_view_type ensure_z() const { return Guide::ensure_z(sv_); }
+
+    iterator begin() const { return sv_.begin(); }
+    iterator end() const { return sv_.end(); }
+
+private:
+    string_view_type sv_;
+};
+
+template <size_t Max = dynamic_range>
+using zstring_builder = basic_zstring_builder<char, Max>;
+
+template <size_t Max = dynamic_range>
+using wzstring_builder = basic_zstring_builder<wchar_t, Max>;
+}

tests/CMakeLists.txt

@@ -0,0 +1,143 @@
+cmake_minimum_required(VERSION 3.2.2)
+
+project(GSLTests)
+
+add_subdirectory(unittest-cpp)
+
+include_directories(
+    ../include
+    ./unittest-cpp
+)
+
+add_definitions(-DSAFER_CPP_TESTING)
+
+if(MSVC14 OR MSVC12)
+    # has the support we need
+else()
+    include(CheckCXXCompilerFlag)
+    CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
+    CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
+    if(COMPILER_SUPPORTS_CXX14)
+    	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
+    elseif(COMPILER_SUPPORTS_CXX11)
+    	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+    else()
+            message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
+    endif()
+endif()
+
+if (NOT EXISTS tests/unittest-cpp)
+  message(FATAL_ERROR "Could not find unittest-cpp enlistment. Please run 'git clone https://github.com/Microsoft/unittest-cpp.git unittest-cpp' in the tests directory")
+endif()
+
+add_executable(array_view_tests
+    array_view_tests.cpp    
+)
+target_link_libraries(array_view_tests
+    UnitTest++
+)
+install(TARGETS array_view_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME array_view_tests
+    COMMAND array_view_tests
+)
+
+add_executable(string_view_tests
+    string_view_tests.cpp    
+)
+target_link_libraries(string_view_tests
+    UnitTest++
+)
+install(TARGETS string_view_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME string_view_tests
+    COMMAND string_view_tests
+)
+
+add_executable(at_tests
+    at_tests.cpp
+)
+target_link_libraries(at_tests
+    UnitTest++
+)
+install(TARGETS at_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME at_tests
+    COMMAND at_tests
+)
+
+add_executable(bounds_tests
+    bounds_tests.cpp
+)
+target_link_libraries(bounds_tests
+    UnitTest++
+)
+install(TARGETS bounds_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME bounds_tests
+    COMMAND bounds_tests
+)
+
+add_executable(maybenull_tests
+    maybenull_tests.cpp
+)
+target_link_libraries(maybenull_tests
+    UnitTest++
+)
+install(TARGETS maybenull_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME maybenull_tests
+    COMMAND maybenull_tests
+)
+
+add_executable(notnull_tests
+    notnull_tests.cpp
+)
+target_link_libraries(notnull_tests
+    UnitTest++
+)
+install(TARGETS notnull_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME notnull_tests
+    COMMAND notnull_tests
+)
+
+add_executable(assertion_tests
+    assertion_tests.cpp
+)
+target_link_libraries(assertion_tests
+    UnitTest++
+)
+install(TARGETS assertion_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME assertion_tests
+    COMMAND assertion_tests
+)
+
+add_executable(utils_tests
+    utils_tests.cpp
+)
+target_link_libraries(utils_tests
+    UnitTest++
+)
+install(TARGETS utils_tests
+    RUNTIME DESTINATION bin
+)
+add_test(
+    NAME utils_tests
+    COMMAND utils_tests
+)

tests/array_view_tests.cpp

@@ -0,0 +1,648 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <array_view.h>
+#include <numeric>
+#include <array>
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <functional>
+#include <algorithm>
+
+
+using namespace std;
+using namespace Guide;
+
+namespace 
+{
+	void use(int&) {}
+	struct BaseClass {};
+	struct DerivedClass : BaseClass {};
+}
+
+SUITE(array_view_tests)
+{
+	TEST(basics)
+	{
+		auto ptr = as_array_view(new int[10], 10);
+		fill(ptr.begin(), ptr.end(), 99);
+		for (int num : ptr)
+		{
+			CHECK(num == 99);
+		}
+
+		delete[] ptr.data();
+
+
+		static_bounds<size_t, 4, dynamic_range, 2> bounds{ 3 };
+	
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view<int, 4, dynamic_range, 2> av(nullptr, bounds);
+		av.extent();
+		av.extent<2>();
+		av[8][4][3];
+#endif
+	}
+
+	TEST (array_view_convertible)
+	{
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view<int, 7, 4, 2> av1(nullptr, b1);
+#endif
+	
+		auto f = [&]() { array_view<int, 7, 4, 2> av1(nullptr); };
+		CHECK_THROW(f(), fail_fast); 
+		
+		array_view<int, 7, dynamic_range, 2> av1(nullptr);
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		static_bounds<size_t, 7, dynamic_range, 2> b12(b11);
+		b12 = b11;
+		b11 = b12;
+	
+		array_view<int, dynamic_range> av1 = nullptr;
+		array_view<int, 7, dynamic_range, 2> av2(av1);
+		array_view<int, 7, 4, 2> av2(av1);
+#endif
+
+		array_view<DerivedClass> avd;
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view<BaseClass> avb = avd;
+#endif
+		array_view<const DerivedClass> avcd = avd;
+	}
+
+	TEST(boundary_checks)
+	{
+		int arr[10][2];
+		auto av = as_array_view(arr);
+
+		fill(begin(av), end(av), 0);
+
+		av[2][0] = 1;
+		av[1][1] = 3;
+
+		// out of bounds
+		CHECK_THROW(av[1][3] = 3, fail_fast);
+		CHECK_THROW((av[{1, 3}] = 3), fail_fast);
+
+		CHECK_THROW(av[10][2], fail_fast);
+		CHECK_THROW((av[{10,2}]), fail_fast);
+	}
+
+	void overloaded_func(array_view<const int, dynamic_range, 3, 5> exp, int expected_value) {
+		for (auto val : exp)
+		{
+			CHECK(val == expected_value);
+		}
+	}
+
+	void overloaded_func(array_view<const char, dynamic_range, 3, 5> exp, char expected_value) {
+		for (auto val : exp)
+		{
+			CHECK(val == expected_value);
+		}
+	}
+
+	void fixed_func(array_view<int, 3, 3, 5> exp, int expected_value) {
+		for (auto val : exp)
+		{
+			CHECK(val == expected_value);
+		}
+	}
+
+	TEST(array_view_parameter_test)
+	{
+		auto data = new int[4][3][5];
+
+		auto av = as_array_view(data, 4);
+
+		CHECK(av.size() == 60);
+
+		fill(av.begin(), av.end(), 34);
+					
+		int count = 0;
+		for_each(av.rbegin(), av.rend(), [&](int val) { count += val; });
+		CHECK(count == 34 * 60);
+		overloaded_func(av, 34);
+
+		overloaded_func(av.as_array_view(dim<>(4), dim<>(3), dim<>(5)), 34);
+
+		//fixed_func(av, 34);
+		delete[] data;
+	}
+
+
+	TEST(md_access)
+	{
+		unsigned int width = 5, height = 20;
+
+		unsigned int imgSize = width * height;
+		auto image_ptr = new int[imgSize][3];
+
+		// size check will be done
+		auto image_view = as_array_view(image_ptr, imgSize).as_array_view(dim<>(height), dim<>(width), dim<3>());
+
+		iota(image_view.begin(), image_view.end(), 1);
+
+		int expected = 0;
+		for (unsigned int i = 0; i < height; i++)
+		{
+			for (unsigned int j = 0; j < width; j++)
+			{
+				CHECK(expected + 1 == image_view[i][j][0]);
+				CHECK(expected + 2 == image_view[i][j][1]);
+				CHECK(expected + 3 == image_view[i][j][2]);
+				
+				auto val = image_view[{i, j, 0}];
+				CHECK(expected + 1 == val);
+				val = image_view[{i, j, 1}];
+				CHECK(expected + 2 == val);
+				val = image_view[{i, j, 2}];
+				CHECK(expected + 3 == val);
+
+				expected += 3;
+			}
+		}
+	}
+
+	TEST(array_view_factory_test)
+	{
+		{
+			int * arr = new int[150];
+
+			auto av = as_array_view(arr, dim<10>(), dim<>(3), dim<5>());
+
+			fill(av.begin(), av.end(), 24);
+			overloaded_func(av, 24);
+
+			delete[] arr;
+
+
+			array<int, 15> stdarr{ 0 };
+			auto av2 = as_array_view(stdarr);
+			overloaded_func(av2.as_array_view(dim<>(1), dim<3>(), dim<5>()), 0);
+
+
+			string str = "ttttttttttttttt"; // size = 15
+			auto t = str.data();
+			auto av3 = as_array_view(str);
+			overloaded_func(av3.as_array_view(dim<>(1), dim<3>(), dim<5>()), 't');
+		}
+
+		{
+			int a[3][4][5];
+			auto av = as_array_view(a);
+			const int (*b)[4][5];
+			b = a;
+			auto bv = as_array_view(b, 3);
+
+			CHECK(av == bv);
+
+			const std::array<double, 3> arr = {0.0, 0.0, 0.0};
+			auto cv = as_array_view(arr);
+
+			vector<float> vec(3);
+			auto dv = as_array_view(vec);
+			
+#ifdef CONFIRM_COMPILATION_ERRORS
+			auto dv2 = as_array_view(std::move(vec));
+#endif
+		}
+	}
+
+	TEST (array_view_reshape_test)
+	{
+		int a[3][4][5];
+		auto av = as_array_view(a);
+		auto av2 = av.as_array_view(dim<60>());
+		auto av3 = av2.as_array_view(dim<3>(), dim<4>(), dim<5>());
+		auto av4 = av3.as_array_view(dim<4>(), dim<>(3), dim<5>());
+		auto av5 = av4.as_array_view(dim<3>(), dim<4>(), dim<5>());
+		auto av6 = av5.as_array_view(dim<12>(), dim<>(5));
+		
+		fill(av6.begin(), av6.end(), 1);
+		
+		auto av7 = av6.as_bytes();
+		
+		auto av8 = av7.as_array_view<int>();
+
+		CHECK(av8.size() == av6.size());
+		for (size_t i = 0; i < av8.size(); i++)
+		{
+			CHECK(av8[i] == 1);
+		}
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		struct Foo {char c[11];};
+		auto av9 = av7.as_array_view<Foo>();
+#endif
+	}
+
+
+	TEST (array_view_section_test)
+	{
+		int a[30][4][5];
+		
+		auto av = as_array_view(a);
+		auto sub = av.section({15, 0, 0}, Guide::index<3>{2, 2, 2});
+		auto subsub = sub.section({1, 0, 0}, Guide::index<3>{1, 1, 1});
+	}
+
+
+	TEST(constructors)
+	{
+		array_view<int, dynamic_range> av(nullptr);
+		CHECK(av.length() == 0);
+
+		array_view<int, dynamic_range> av2;
+		CHECK(av2.length() == 0);
+
+		array_view<int, dynamic_range> av3(nullptr, 0);
+		CHECK(av3.length() == 0);
+
+		// Constructing from a nullptr + length is specifically disallowed
+		auto f = [&]() {array_view<int, dynamic_range> av4(nullptr, 2);};
+		CHECK_THROW(f(), fail_fast);
+
+		int arr1[2][3];
+		array_view<int, 2, dynamic_range> av5(arr1);
+
+		array<int, 15> arr2;
+		array_view<int, 15> av6(arr2);
+
+		vector<int> vec1(19);
+		array_view<int> av7(vec1);
+		CHECK(av7.length() == 19);
+
+
+		array_view<int> av8;
+		CHECK(av8.length() == 0);
+		array_view<int> av9(arr2);
+		CHECK(av9.length() == 15);
+
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view<int, 4> av10;
+		DerivedClass *p = nullptr;
+		array_view<BaseClass> av11(p, 0);
+#endif
+
+
+	}
+
+	TEST(copyandassignment)
+	{
+		array_view<int, dynamic_range> av1;
+
+		int arr[] = {3, 4, 5};
+		av1 = arr;
+		array_view<array_view_options<const int, unsigned char>, dynamic_range> av2;
+		av2 = av1;
+	}
+
+	TEST(array_view_first)
+	{
+		int arr[5] = { 1, 2, 3, 4, 5 };
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.first<2>().bounds() == static_bounds<size_t, 2>()));
+			CHECK(av.first<2>().length() == 2);
+			CHECK(av.first(2).length() == 2);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.first<0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK(av.first<0>().length() == 0);
+			CHECK(av.first(0).length() == 0);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.first<5>().bounds() == static_bounds<size_t, 5>()));
+			CHECK(av.first<5>().length() == 5);
+			CHECK(av.first(5).length() == 5);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+#ifdef CONFIRM_COMPILATION_ERRORS
+			CHECK(av.first<6>().bounds() == static_bounds<size_t, 6>());
+			CHECK(av.first<6>().length() == 6);
+#endif
+			CHECK_THROW(av.first(6).length(), fail_fast);
+		}
+
+		{
+			array_view<int, dynamic_range> av;
+			CHECK((av.first<0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK(av.first<0>().length() == 0);
+			CHECK(av.first(0).length() == 0);
+		}
+	}
+
+	TEST(array_view_last)
+	{
+		int arr[5] = { 1, 2, 3, 4, 5 };
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.last<2>().bounds() == static_bounds<size_t, 2>()));
+			CHECK(av.last<2>().length() == 2);
+			CHECK(av.last(2).length() == 2);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.last<0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK(av.last<0>().length() == 0);
+			CHECK(av.last(0).length() == 0);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.last<5>().bounds() == static_bounds<size_t, 5>()));
+			CHECK(av.last<5>().length() == 5);
+			CHECK(av.last(5).length() == 5);
+		}
+
+		
+		{
+			array_view<int, 5> av = arr;
+#ifdef CONFIRM_COMPILATION_ERRORS
+			CHECK((av.last<6>().bounds() == static_bounds<size_t, 6>()));
+			CHECK(av.last<6>().length() == 6);
+#endif
+			CHECK_THROW(av.last(6).length(), fail_fast);
+		}
+
+		{
+			array_view<int, dynamic_range> av;
+			CHECK((av.last<0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK(av.last<0>().length() == 0);
+			CHECK(av.last(0).length() == 0);
+		}
+	}
+
+	TEST(custmized_array_view_size)
+	{
+		double (*arr)[3][4] = new double[100][3][4];
+		array_view<array_view_options<double, char>, dynamic_range, 3, 4> av1(arr, (char)10);
+
+		struct EffectiveStructure
+		{
+			double* v1;
+			char v2;
+		};
+		CHECK(sizeof(av1) == sizeof(EffectiveStructure));
+
+		CHECK_THROW(av1[10][3][4], fail_fast);
+
+		array_view<const double, dynamic_range, 6, 4> av2 = av1.as_array_view(dim<>(5), dim<6>(), dim<4>());
+		
+	}
+
+	TEST(array_view_sub)
+	{
+		int arr[5] = { 1, 2, 3, 4, 5 };
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.sub<2,2>().bounds() == static_bounds<size_t, 2>()));
+			CHECK((av.sub<2,2>().length() == 2));
+			CHECK(av.sub(2,2).length() == 2);
+		}
+
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.sub<0,0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK((av.sub<0,0>().length() == 0));
+			CHECK(av.sub(0,0).length() == 0);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+			CHECK((av.sub<0,5>().bounds() == static_bounds<size_t, 5>()));
+			CHECK((av.sub<0,5>().length() == 5));
+			CHECK(av.sub(0,5).length() == 5);
+		}
+
+		{
+			array_view<int, 5> av = arr;
+#ifdef CONFIRM_COMPILATION_ERRORS
+			CHECK((av.sub<5,0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK((av.sub<5,0>().length() == 0));
+#endif
+			CHECK_THROW(av.sub(5,0).length(), fail_fast);
+		}
+
+		{
+			array_view<int, dynamic_range> av;
+			CHECK((av.sub<0,0>().bounds() == static_bounds<size_t, 0>()));
+			CHECK((av.sub<0,0>().length() == 0));
+			CHECK(av.sub(0,0).length() == 0);
+		}
+	}
+
+	void AssertNullEmptyProperties(array_view<int, dynamic_range>& av)
+	{
+		CHECK(av.length() == 0);
+		CHECK(av.data() == nullptr);
+		CHECK(!av);
+	}
+
+	template <class T, class U>
+	void AssertContentsMatch(T a1, U a2)
+	{
+		CHECK(a1.length() == a2.length());
+		for (size_t i = 0; i < a1.length(); ++i)
+			CHECK(a1[i] == a2[i]);
+	}
+
+	TEST(TestNullConstruction)
+	{
+		array_view<int, dynamic_range> av;
+		AssertNullEmptyProperties(av);
+
+		array_view<int, dynamic_range> av2(nullptr);
+		AssertNullEmptyProperties(av2);
+	}
+
+	TEST(ArrayConstruction)
+	{
+		int a[] = { 1, 2, 3, 4 };
+
+		array_view<int, dynamic_range> av = { &a[1], 3 };
+		CHECK(av.length() == 3);
+
+		array_view<int, dynamic_range> av3 = { a, 2 };
+		CHECK(av3.length() == 2);
+
+		array_view<int, dynamic_range> av2 = a;
+		CHECK(av2.length() == 4);
+	}
+
+	TEST(NonConstConstConversions)
+	{
+		int a[] = { 1, 2, 3, 4 };
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view<const int, dynamic_range> cav = a;
+		array_view<int, dynamic_range> av = cav;
+#else
+		array_view<int, dynamic_range> av = a;
+		array_view<const int, dynamic_range> cav = av;             
+#endif
+		AssertContentsMatch(av, cav);
+	}
+
+	TEST(FixedSizeConversions)
+	{            
+		int arr[] = { 1, 2, 3, 4 };
+	
+		// converting to an array_view from an equal size array is ok
+		array_view<int, 4> av4 = arr;
+		CHECK(av4.length() == 4);
+
+		// converting to dynamic_range a_v is always ok
+		{
+			array_view<int, dynamic_range> av = av4;
+		}
+		{
+			array_view<int, dynamic_range> av = arr;
+		}
+
+		// initialization or assignment to static array_view that REDUCES size is NOT ok
+#ifdef CONFIRM_COMPILATION_ERRORS
+		{
+			array_view<int, 2> av2 = arr;
+		}
+		{
+			array_view<int, 2> av2 = av4;
+		}
+#endif
+
+		{
+			array_view<int, dynamic_range> av = arr;
+			array_view<int, 2> av2 = av;
+		}
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		{
+			array_view<int, dynamic_range> av = arr;
+			array_view<int, 2, 1> av2 = av.as_array_view(dim<2>(), dim<2>());
+		}
+#endif
+
+		{
+			array_view<int, dynamic_range> av = arr;
+			auto f = [&]() {array_view<int, 2, 1> av2 = av.as_array_view(dim<>(2), dim<>(2));};
+			CHECK_THROW(f(), fail_fast);
+		}
+
+		// but doing so explicitly is ok
+			
+		// you can convert statically
+		{
+			array_view<int, 2> av2 = {arr, 2};
+		}
+		{
+			array_view<int, 1> av2 = av4.first<1>();
+		}
+			
+		// ...or dynamically
+		{
+			// NB: implicit conversion to array_view<int,2> from array_view<int,dynamic_range>
+			array_view<int, 1> av2 = av4.first(1); 
+		}
+
+		// initialization or assignment to static array_view that requires size INCREASE is not ok.
+		int arr2[2]  = { 1, 2 };
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+		{
+			array_view<int, 4> av4 = arr2;
+		}
+		{
+			array_view<int, 2> av2 = arr2;
+			array_view<int, 4> av4 = av2;
+		}
+#endif
+		{
+			auto f = [&]() {array_view<int, 4> av4 = {arr2, 2};};
+			CHECK_THROW(f(), fail_fast);
+		}
+
+		// this should fail - we are trying to assign a small dynamic a_v to a fixed_size larger one
+		array_view<int, dynamic_range> av = arr2;
+		auto f = [&](){ array_view<int, 4> av2 = av; };
+		CHECK_THROW(f(), fail_fast);
+	}
+
+	TEST(AsWriteableBytes)        
+	{
+		int a[] = { 1, 2, 3, 4 };
+
+		{
+#ifdef CONFIRM_COMPILATION_ERRORS
+			// you should not be able to get writeable bytes for const objects
+			array_view<const int, dynamic_range> av = a;
+			auto wav = av.as_writeable_bytes();
+#endif
+		}
+
+		{
+			array_view<int, dynamic_range> av;
+			auto wav = av.as_writeable_bytes();
+			CHECK(wav.length() == av.length());
+			CHECK(wav.length() == 0);
+			CHECK(wav.bytes() == 0);
+		}
+
+		{
+			array_view<int, dynamic_range> av = a;
+			auto wav = av.as_writeable_bytes();
+			CHECK(wav.data() == (byte*)&a[0]);
+			CHECK(wav.length() == sizeof(a));
+		}
+
+	}
+
+
+	TEST(ArrayViewComparison)
+	{
+		int arr[10][2];
+		auto av1 = as_array_view(arr);
+		array_view<const int, dynamic_range, 2> av2 = av1;
+
+		CHECK(av1 == av2);
+
+		array_view<array_view_options<int, char>, 20> av3 = av1.as_array_view(dim<>(20));
+		CHECK(av3 == av2 && av3 == av1);
+
+	}
+}
+
+int main(int, const char *[])
+{
+	return UnitTest::RunAllTests();
+}

tests/assertion_tests.cpp

@@ -0,0 +1,53 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <gsl.h>
+
+using namespace Guide;
+
+SUITE(assertion_tests)
+{
+    int f(int i)
+    {
+        Expects(i > 0 && i < 10);
+        return i;
+    }
+
+    TEST(expects)
+    {
+        CHECK(f(2) == 2);
+        CHECK_THROW(f(10), fail_fast);
+    }
+
+    int g(int i)
+    {        
+        i++;
+        Ensures(i > 0 && i < 10);
+        return i;
+    }
+
+    TEST(ensures)
+    {
+        CHECK(g(2) == 3);
+        CHECK_THROW(g(9), fail_fast);
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}

tests/at_tests.cpp

@@ -0,0 +1,60 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <gsl.h>
+#include <vector>
+
+using namespace std;
+using namespace Guide;
+
+SUITE(at_tests)
+{
+    TEST(static_array)
+    {
+        int a[] = { 1, 2, 3, 4 };
+
+        for (int i = 0; i < 4; ++i)
+            CHECK(at(a, i) == i+1);
+
+        CHECK_THROW(at(a, 4), fail_fast);
+    }
+
+    TEST(std_array)
+    {
+        std::array<int,4> a = { 1, 2, 3, 4 };
+
+        for (int i = 0; i < 4; ++i)
+            CHECK(at(a, i) == i+1);
+
+        CHECK_THROW(at(a, 4), fail_fast);
+    }
+
+    TEST(StdVector)
+    {
+        std::vector<int> a = { 1, 2, 3, 4 };
+
+        for (int i = 0; i < 4; ++i)
+            CHECK(at(a, i) == i+1);
+
+        CHECK_THROW(at(a, 4), fail_fast);
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}

tests/bounds_tests.cpp

@@ -0,0 +1,99 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <array_view.h>
+#include <vector>
+
+using namespace std;
+using namespace Guide;;
+
+namespace 
+{
+	void use(unsigned int&) {}
+}
+
+SUITE(bounds_test)
+{
+	TEST(basic_bounds)
+	{
+		for (auto point : static_bounds <unsigned int, dynamic_range, 3, 4 > { 2 })
+		{
+			for (unsigned int j = 0; j < decltype(point)::rank; j++)
+			{
+				use(j);
+				use(point[j]);
+			}
+		}
+	}
+	
+	TEST(bounds_basic)
+	{
+		static_bounds<size_t, 3, 4, 5> b;
+		auto a = b.slice();
+		static_bounds<size_t, 4, dynamic_range, 2> x{ 4 };
+		x.slice().slice();
+	}
+	
+	TEST (arrayview_iterator)
+	{
+		static_bounds<size_t, 4, dynamic_range, 2> bounds{ 3 };
+		
+		auto itr = bounds.begin();
+	
+#ifdef CONFIRM_COMPILATION_ERRORS
+		array_view< int, 4, dynamic_range, 2> av(nullptr, bounds);
+	
+		auto itr2 = av.cbegin();
+	
+		for (auto & v : av) {
+			v = 4;
+		}
+		fill(av.begin(), av.end(), 0);
+#endif			
+	}
+	
+	TEST (bounds_convertible)
+	{
+		static_bounds<size_t, 7, 4, 2> b1;
+		static_bounds<size_t, 7, dynamic_range, 2> b2 = b1;
+	
+#ifdef CONFIRM_COMPILATION_ERRORS
+		static_bounds<size_t, 7, dynamic_range, 1> b4 = b2; 
+#endif
+	
+		static_bounds<size_t, dynamic_range, dynamic_range, dynamic_range> b3 = b1;
+		static_bounds<int, 7, 4, 2> b4 = b3; 
+
+		static_bounds<size_t, dynamic_range> b11;
+	
+		static_bounds<size_t, dynamic_range> b5;
+		static_bounds<size_t, 34> b6;
+		
+		b5 = static_bounds<size_t, 20>();
+		CHECK_THROW(b6 = b5, fail_fast);
+		b5 = static_bounds<size_t, 34>();
+		b6 = b5;
+
+		CHECK(b5 == b6);
+		CHECK(b5.size() == b6.size());
+	}                                 
+}
+
+int main(int, const char *[])
+{
+	return UnitTest::RunAllTests();
+}

tests/maybenull_tests.cpp

@@ -0,0 +1,197 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <gsl.h>
+
+using namespace Guide;
+
+struct MyBase { bool foo() { return true; } };
+struct MyDerived : public MyBase {};
+struct Unrelated {};
+
+SUITE(MaybeNullTests)
+{
+    TEST(TestMaybeNull1)
+    {
+        int n = 5;
+        maybe_null_dbg<int *> opt_n(&n);
+        int result = 0;
+        bool threw = false;
+
+        CHECK_THROW(result = *opt_n, fail_fast);
+    }
+
+    TEST(TestMaybeNull2)
+    {
+        int n = 5;
+        maybe_null<int *> opt_n(&n);
+        int result = 0;
+        if (opt_n.present())
+	        result = *opt_n;
+    }
+
+    TEST(TestMaybeNull3)
+    {
+        int n = 5;
+        maybe_null<int *> opt_n(&n);
+        int result = 0;
+        if (opt_n != nullptr) 
+		    result = *opt_n;
+    }
+
+    int test4_helper(maybe_null<int *> p)
+    {
+        if (p != nullptr)
+            return *p;
+        return -1;
+    }
+
+    TEST(TestMaybeNull4)
+    {
+        int n = 5;
+        int result = 0;
+        result = test4_helper(&n);
+    }
+
+    int test5_helper(maybe_null_dbg<int *> p)
+    {
+        return *p;
+    }
+
+    TEST(TestMaybeNull5)
+    {
+        int n = 5;
+        int result = 0;
+        bool threw = false;
+
+        CHECK_THROW(result = test5_helper(&n), fail_fast);
+    }
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+    int TestMaybeNull6()
+    {
+        int n;
+        maybe_null<int> o(n);
+    }
+#endif
+
+    int g_int;
+    void test7_helper(maybe_null<maybe_null<int *> *> outptr)
+    {
+        g_int = 5;
+
+        if (outptr.present())
+	        *outptr = &g_int;
+    }
+
+    void test7b_helper(maybe_null_dbg<maybe_null_dbg<int *> *> outptr)
+    {
+        g_int = 5;
+
+        if (outptr.present())
+            *outptr = &g_int;
+    }
+
+    TEST(TestMaybeNull7a)
+    {
+        maybe_null<int *> outval;
+        test7_helper(&outval);
+        CHECK(outval.present() && *outval == 5);
+    }
+
+    TEST(TestMaybeNull7b)
+    {
+        maybe_null_dbg<int *> outval;
+        test7b_helper(&outval);
+	CHECK_THROW((void)*outval, fail_fast);
+    }
+
+    int test8_helper1(maybe_null_dbg<int *> opt)
+    {
+        return *opt;
+    }
+
+    int test8_helper2a(maybe_null_dbg<int *> opt)
+    {
+        if (!opt.present())
+	        return 0;
+        return test8_helper1(opt);
+    }
+
+    TEST(TestMaybeNull8a)
+    {
+        int n = 5;
+        maybe_null_dbg<int *> opt(&n);
+	    CHECK_THROW(test8_helper2a(opt), fail_fast);
+    }
+
+#ifdef CONVERT_TO_PTR_TO_CONST
+    int test9_helper(maybe_null<const int *> copt)
+    {
+        if (copt.present())
+	        return *copt;
+        return 0;
+    }
+
+    void TestMaybeNull9()
+    {
+        int n = 5;
+        maybe_null<int *> opt(&n);
+	    CHECK_THROW(test9_helper(opt), fail_fast);
+    }
+#endif
+
+    TEST(TestMaybeNullCasting)
+    {
+        MyDerived derived;
+        maybe_null<MyDerived*> p = &derived;
+        CHECK(p.present());
+
+        maybe_null<MyBase*> q = p;
+        CHECK(q == p);
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+        maybe_null<Unrelated*> r = p;
+        maybe_null<Unrelated*> s = reinterpret_cast<Unrelated*>(p);
+#endif
+        maybe_null_dbg<Unrelated*> t = reinterpret_cast<Unrelated*>(p.get());
+
+	CHECK_THROW((void)(void*)t.get(), fail_fast);
+        maybe_null_dbg<Unrelated*> u = reinterpret_cast<Unrelated*>(p.get());
+        CHECK(u.present());
+        CHECK((void*)p.get() == (void*)u.get());
+    }
+
+    TEST(TestMaybeNullArrow)
+    {
+        MyDerived derived;
+        maybe_null_dbg<MyDerived*> p = &derived;
+
+        CHECK_THROW(p->foo(), fail_fast);
+        CHECK(p.present());
+        CHECK(p->foo());
+
+        maybe_null<MyBase*> q = p;
+        CHECK(q.present());
+        CHECK(q->foo());
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}

tests/notnull_tests.cpp

@@ -0,0 +1,87 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <gsl.h>
+
+using namespace Guide;
+
+struct MyBase {};
+struct MyDerived : public MyBase {};
+struct Unrelated {};
+
+// stand-in for a user-defined ref-counted class
+template<typename T>
+struct RefCounted
+{
+    RefCounted(T* p) : p_(p) {}
+    operator T*() { return p_; }
+    T* p_;
+};
+
+SUITE(NotNullTests)
+{
+
+    bool helper(not_null<int*> p)
+    {
+        return *p == 12;
+    }
+
+    TEST(TestNotNullConstructors)
+    {
+#ifdef CONFIRM_COMPILATION_ERRORS
+        not_null<int*> p = nullptr; // yay...does not compile!
+        not_null<std::vector<char>*> p = 0; // yay...does not compile!
+        not_null<int*> p; // yay...does not compile!
+        std::unique_ptr<int> up = std::make_unique<int>(120);
+        not_null<int*> p = up;
+#endif
+      int i = 12; 
+      auto rp = RefCounted<int>(&i);
+      not_null<int*> p(rp);
+      CHECK(p.get() == &i);
+    }
+
+    TEST(TestNotNullCasting)
+    {
+        MyDerived derived;
+        not_null<MyDerived*> p = &derived;
+        not_null<MyBase*> q = p;
+        CHECK(q == p);
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+        not_null<Unrelated*> r = p;
+        not_null<Unrelated*> s = reinterpret_cast<Unrelated*>(p);
+#endif
+        not_null<Unrelated*> t = reinterpret_cast<Unrelated*>(p.get());
+        CHECK((void*)p.get() == (void*)t.get());
+    }
+
+    TEST(TestNotNullAssignment)
+    {
+        int i = 12;
+        not_null<int*> p = &i; 
+        CHECK(helper(p));
+
+        int* q = nullptr;
+        CHECK_THROW(p = q, fail_fast);
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}

tests/string_view_tests.cpp

@@ -0,0 +1,104 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <string_view.h>
+#include <vector>
+#include <cstdlib>
+
+using namespace std;
+using namespace Guide;
+
+SUITE(string_view_tests)
+{
+
+    TEST(TestLiteralConstruction)
+	{
+        cwstring_view<> v = ensure_z(L"Hello");
+
+        CHECK(5 == v.length());
+
+#ifdef CONFIRM_COMPILATION_ERRORS
+        wstring_view<> v2 = ensure0(L"Hello");
+#endif
+	}
+
+    TEST(TestConstructFromStdString)
+    {
+        std::string s = "Hello there world";
+        cstring_view<> v = s;
+        CHECK(v.length() == s.length());
+    }
+
+    TEST(TestConstructFromStdVector)
+    {
+        std::vector<char> vec('h', 5);
+        string_view<> v = vec;
+        CHECK(v.length() == vec.size());
+    }
+
+	TEST(TestStackArrayConstruction)
+	{
+        wchar_t stack_string[] = L"Hello";
+
+        {
+            cwstring_view<> v = ensure_z(stack_string);
+            CHECK(v.length() == 5);
+            CHECK(v.used_length() == v.length());
+        }
+
+        {
+            cwstring_view<> v = stack_string;
+            CHECK(v.length() == 6);
+            CHECK(v.used_length() == v.length());
+        }
+
+        {
+            wstring_view<> v = ensure_z(stack_string);
+            CHECK(v.length() == 5);
+            CHECK(v.used_length() == v.length());
+        }
+
+        {
+            wstring_view<> v = stack_string;
+            CHECK(v.length() == 6);
+            CHECK(v.used_length() == v.length());
+        }
+	}
+
+    TEST(TestConversionToConst)
+    {
+        char stack_string[] = "Hello";
+        string_view<> v = ensure_z(stack_string);
+        cstring_view<> v2 = v; 
+        CHECK(v.length() == v2.length());
+    }
+
+    TEST(TestConversionFromConst)
+    {
+        char stack_string[] = "Hello";
+        cstring_view<> v = ensure_z(stack_string);
+#ifdef CONFIRM_COMPILATION_ERRORS
+        string_view<> v2 = v;
+        string_view<> v3 = "Hello";
+#endif
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}

tests/utils_tests.cpp

@@ -0,0 +1,87 @@
+/////////////////////////////////////////////////////////////////////////////// 
+// 
+// Copyright (c) 2015 Microsoft Corporation. All rights reserved. 
+// 
+// This code is licensed under the MIT License (MIT). 
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+// THE SOFTWARE. 
+// 
+///////////////////////////////////////////////////////////////////////////////
+
+#include <UnitTest++/UnitTest++.h> 
+#include <gsl.h>
+#include <functional>
+
+using namespace Guide;
+
+SUITE(utils_tests)
+{
+    void f(int& i)
+    {
+        i += 1;
+    }
+
+    TEST(finally_lambda)
+    {
+        int i = 0;
+        {
+            auto _ = finally([&]() {f(i);});
+            CHECK(i == 0);
+        }
+        CHECK(i == 1);
+    }
+
+    TEST(finally_function_with_bind)
+    {
+        int i = 0;
+        {
+            auto _ = finally(std::bind(&f, std::ref(i)));
+            CHECK(i == 0);
+        }
+        CHECK(i == 1);
+    }
+
+    int j = 0;
+    void g() { j += 1; };
+    TEST(finally_function_ptr)
+    {
+        j = 0;
+        {
+            auto _ = finally(&g);
+            CHECK(j == 0);
+        }
+        CHECK(j == 1);
+    }
+
+    TEST(narrow_cast)
+    {
+        int n = 120;
+        char c = narrow_cast<char>(n);
+        CHECK(c == 120);
+
+        n = 300;
+        unsigned char uc = narrow_cast<unsigned char>(n);
+        CHECK(uc == 44);
+    }
+
+    TEST(narrow)
+    {
+        int n = 120;
+        char c = narrow<char>(n);
+        CHECK(c == 120);
+
+        n = 300;        
+        CHECK_THROW(narrow<char>(n), narrowing_error);
+    }
+}
+
+int main(int, const char *[])
+{
+    return UnitTest::RunAllTests();
+}