Added std::array<>

.editorconfig

@@ -1,6 +1,6 @@
 root = true
 
-[*.{c,h,d,di,dd}]
+[*.{c,cpp,h,d,di,dd}]
 insert_final_newline = true
 indent_style = space
 indent_size = 4

changelog/array.dd

@@ -0,0 +1,3 @@
+Added `core.stdcpp.array`.
+
+Added `core.stdcpp.array`, which links against C++ `std::array`

mak/COPY

@@ -48,8 +48,10 @@ COPY=\
 	$(IMPDIR)\core\stdc\wchar_.d \
 	$(IMPDIR)\core\stdc\wctype.d \
 	\
-	$(IMPDIR)\core\stdcpp\typeinfo.d \
+	$(IMPDIR)\core\stdcpp\array.d \
 	$(IMPDIR)\core\stdcpp\exception.d \
+	$(IMPDIR)\core\stdcpp\typeinfo.d \
+	$(IMPDIR)\core\stdcpp\xutility.d \
 	\
 	$(IMPDIR)\core\sys\darwin\execinfo.d \
 	$(IMPDIR)\core\sys\darwin\pthread.d \

mak/DOCS

@@ -38,6 +38,7 @@ DOCS=\
 	$(DOCDIR)\core_stdc_wchar_.html \
 	$(DOCDIR)\core_stdc_wctype.html \
 	\
+	$(DOCDIR)\core_stdcpp_array.html \
 	$(DOCDIR)\core_stdcpp_exception.html \
 	$(DOCDIR)\core_stdcpp_typeinfo.html \
 	\

mak/SRCS

@@ -46,6 +46,9 @@ SRCS=\
 	src\core\stdc\time.d \
 	src\core\stdc\wchar_.d \
 	\
+	src\core\stdcpp\array.d \
+	src\core\stdcpp\xutility.d \
+	\
 	src\core\sync\barrier.d \
 	src\core\sync\condition.d \
 	src\core\sync\config.d \

mak/WINDOWS

@@ -187,9 +187,15 @@ $(IMPDIR)\core\stdc\wctype.d : src\core\stdc\wctype.d
 $(IMPDIR)\core\stdcpp\exception.d : src\core\stdcpp\exception.d
 	copy $** $@
 
+$(IMPDIR)\core\stdcpp\array.d : src\core\stdcpp\array.d
+	copy $** $@
+
 $(IMPDIR)\core\stdcpp\typeinfo.d : src\core\stdcpp\typeinfo.d
 	copy $** $@
 
+$(IMPDIR)\core\stdcpp\xutility.d : src\core\stdcpp\xutility.d
+	copy $** $@
+
 $(IMPDIR)\core\sys\darwin\execinfo.d : src\core\sys\darwin\execinfo.d
 	copy $** $@
 

posix.mak

@@ -244,7 +244,7 @@ HAS_ADDITIONAL_TESTS:=$(shell test -d test && echo 1)
 ifeq ($(HAS_ADDITIONAL_TESTS),1)
 	ADDITIONAL_TESTS:=test/init_fini test/exceptions test/coverage test/profile test/cycles test/allocations test/typeinfo \
 	    test/aa test/hash \
-	    test/thread test/unittest test/imports test/betterc
+	    test/thread test/unittest test/imports test/betterc test/stdcpp
 	ADDITIONAL_TESTS+=$(if $(SHARED),test/shared,)
 endif
 

src/core/stdcpp/array.d

@@ -0,0 +1,145 @@
+/**
+ * D header file for interaction with C++ std::array.
+ *
+ * Copyright: Copyright (c) 2018 D Language Foundation
+ * License: Distributed under the
+ *      $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
+ *    (See accompanying file LICENSE)
+ * Authors:   Manu Evans
+ * Source:    $(DRUNTIMESRC core/stdcpp/array.d)
+ */
+
+module core.stdcpp.array;
+
+// hacks to support DMD on Win32
+version (CppRuntime_Microsoft)
+{
+    version = CppRuntime_Windows; // use the MS runtime ABI for win32
+}
+else version (CppRuntime_DigitalMars)
+{
+    version = CppRuntime_Windows; // use the MS runtime ABI for win32
+    pragma(msg, "std::array not supported by DMC");
+}
+version (CppRuntime_Clang)
+{
+    private alias AliasSeq(Args...) = Args;
+    private enum StdNamespace = AliasSeq!("std", "__1");
+}
+else
+{
+    private enum StdNamespace = "std";
+}
+
+extern(C++, (StdNamespace)):
+
+/**
+ * D language counterpart to C++ std::array.
+ *
+ * C++ reference: $(LINK2 https://en.cppreference.com/w/cpp/container/array)
+ */
+extern(C++, class) struct array(T, size_t N)
+{
+extern(D):
+pragma(inline, true):
+
+    ///
+    alias size_type = size_t;
+    ///
+    alias difference_type = ptrdiff_t;
+    ///
+    alias value_type = T;
+    ///
+    alias pointer = T*;
+    ///
+    alias const_pointer = const(T)*;
+
+    ///
+    alias as_array this;
+
+    /// Variadic constructor
+    this(T[N] args ...)                                             { this[] = args[]; }
+
+    ///
+    size_type size() const nothrow @safe @nogc                      { return N; }
+    ///
+    alias length = size;
+    ///
+    alias opDollar = length;
+    ///
+    size_type max_size() const nothrow @safe @nogc                  { return N; }
+    ///
+    bool empty() const nothrow @safe @nogc                          { return N == 0; }
+
+    ///
+    ref inout(T) front() inout nothrow @safe @nogc                  { static if (N > 0) { return this[0]; } else { return as_array()[][0]; /* HACK: force OOB */ } }
+    ///
+    ref inout(T) back() inout nothrow @safe @nogc                   { static if (N > 0) { return this[N-1]; } else { return as_array()[][0]; /* HACK: force OOB */ } }
+
+    ///
+    void fill()(auto ref const(T) value)                            { this[] = value; }
+
+    version (CppRuntime_Windows)
+    {
+        ///
+        inout(T)* data() inout nothrow @safe @nogc                  { return &_Elems[0]; }
+        ///
+        ref inout(T)[N] as_array() const inout @safe @nogc          { return _Elems[0 .. N]; }
+        ///
+        ref inout(T) at(size_type i) inout nothrow @safe @nogc      { return _Elems[0 .. N][i]; }
+
+        version (CppRuntime_Microsoft)
+        {
+            import core.stdcpp.xutility : MSVCLinkDirectives;
+            mixin MSVCLinkDirectives!false;
+        }
+
+    private:
+        T[N ? N : 1] _Elems;
+    }
+    else version (CppRuntime_Gcc)
+    {
+        ///
+        inout(T)* data() inout nothrow @safe @nogc                  { static if (N > 0) { return &_M_elems[0]; } else { return null; } }
+        ///
+        ref inout(T)[N] as_array() inout nothrow @trusted @nogc     { return data()[0 .. N]; }
+        ///
+        ref inout(T) at(size_type i) inout nothrow @trusted @nogc   { return data()[0 .. N][i]; }
+
+    private:
+        static if (N > 0)
+        {
+            T[N] _M_elems;
+        }
+        else
+        {
+            struct _Placeholder {}
+            _Placeholder _M_placeholder;
+        }
+    }
+    else version (CppRuntime_Clang)
+    {
+        ///
+        inout(T)* data() inout nothrow @trusted @nogc               { static if (N > 0) { return &__elems_[0]; } else { return cast(inout(T)*)__elems_.ptr; } }
+        ///
+        ref inout(T)[N] as_array() inout nothrow @trusted @nogc     { return data()[0 .. N]; }
+        ///
+        ref inout(T) at(size_type i) inout nothrow @trusted @nogc   { return data()[0 .. N][i]; }
+
+    private:
+        static if (N > 0)
+        {
+            T[N] __elems_;
+        }
+        else
+        {
+            struct _ArrayInStructT { T[1] __data_; }
+            align(_ArrayInStructT.alignof)
+            byte[_ArrayInStructT.sizeof] __elems_ = void;
+        }
+    }
+    else
+    {
+        static assert(false, "C++ runtime not supported");
+    }
+}

src/core/stdcpp/xutility.d

@@ -0,0 +1,60 @@
+/**
+ * D header file for interaction with Microsoft C++ <xutility>
+ *
+ * Copyright: Copyright (c) 2018 D Language Foundation
+ * License: Distributed under the
+ *      $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0).
+ *    (See accompanying file LICENSE)
+ * Authors:   Manu Evans
+ * Source:    $(DRUNTIMESRC core/stdcpp/xutility.d)
+ */
+
+module core.stdcpp.xutility;
+
+extern(C++, "std"):
+
+version (CppRuntime_Microsoft)
+{
+    // Client code can mixin the set of MSVC linker directives
+    mixin template MSVCLinkDirectives(bool failMismatch = false)
+    {
+        import core.stdcpp.xutility : __CXXLIB__;
+
+        static if (__CXXLIB__ == "libcmtd")
+        {
+            pragma(lib, "libcpmtd");
+            static if (failMismatch)
+                pragma(linkerDirective, "/FAILIFMISMATCH:RuntimeLibrary=MTd_StaticDebug");
+        }
+        else static if (__CXXLIB__ == "msvcrtd")
+        {
+            pragma(lib, "msvcprtd");
+            static if (failMismatch)
+                pragma(linkerDirective, "/FAILIFMISMATCH:RuntimeLibrary=MDd_DynamicDebug");
+        }
+        else static if (__CXXLIB__ == "libcmt")
+        {
+            pragma(lib, "libcpmt");
+            static if (failMismatch)
+                pragma(linkerDirective, "/FAILIFMISMATCH:RuntimeLibrary=MT_StaticRelease");
+        }
+        else static if (__CXXLIB__ == "msvcrt")
+        {
+            pragma(lib, "msvcprt");
+            static if (failMismatch)
+                pragma(linkerDirective, "/FAILIFMISMATCH:RuntimeLibrary=MD_DynamicRelease");
+        }
+    }
+
+    // convenient alias for the C++ std library name
+    enum __CXXLIB__ = __traits(getTargetInfo, "cppRuntimeLibrary");
+
+package:
+    // these are all [[noreturn]]
+    void _Xbad() nothrow @trusted @nogc;
+    void _Xinvalid_argument(const(char)* message) nothrow @trusted @nogc;
+    void _Xlength_error(const(char)* message) nothrow @trusted @nogc;
+    void _Xout_of_range(const(char)* message) nothrow @trusted @nogc;
+    void _Xoverflow_error(const(char)* message) nothrow @trusted @nogc;
+    void _Xruntime_error(const(char)* message) nothrow @trusted @nogc;
+}

test/common.mak

@@ -28,3 +28,7 @@ else
 	DFLAGS += -O -release
 	CFLAGS += -O3
 endif
+CXXFLAGS:=$(CFLAGS) -std=c++11
+ifeq (osx,$(OS))
+	CXXFLAGS+=-stdlib=libc++
+endif

test/stdcpp/Makefile

@@ -0,0 +1,29 @@
+include ../common.mak
+
+TESTS:=array
+
+.PHONY: all clean
+
+# osx32 does not link properly, nobody uses it anyway...
+ifeq ($(OS)$(MODEL), osx32)
+
+all:
+
+clean:
+
+else
+all: $(addprefix $(ROOT)/,$(addsuffix .done,$(TESTS)))
+
+$(ROOT)/%.done : $(ROOT)/%
+	@echo Testing $*
+	$(QUIET)$(TIMELIMIT)$(ROOT)/$* $(RUN_ARGS)
+	@touch $@
+
+$(ROOT)/%: $(SRC)/%_test.d $(SRC)/%.cpp
+	mkdir -p $(dir $@)
+	$(QUIET)$(CXX) $(CXXFLAGS) -c -o $(ROOT)/$*_cpp.o $(SRC)/$*.cpp
+	$(QUIET)$(DMD) $(DFLAGS) -main -unittest -of$@ $< $(ROOT)/$*_cpp.o
+
+clean:
+	rm -rf $(GENERATED)
+endif

test/stdcpp/src/array.cpp

@@ -0,0 +1,20 @@
+#include <array>
+
+std::array<int, 5> fromC_val(std::array<int, 5>);
+std::array<int, 5>& fromC_ref(std::array<int, 5>&);
+
+std::array<int, 5>& sumOfElements_ref(std::array<int, 5>& arr)
+{
+    int r = 0;
+    for (size_t i = 0; i < arr.size(); ++i)
+        r += arr[i];
+    arr.fill(r);
+    return arr;
+}
+
+std::array<int, 5> sumOfElements_val(std::array<int, 5> arr)
+{
+    int r = sumOfElements_ref(arr)[0] + fromC_ref(arr)[0] + fromC_val(arr)[0];
+    arr.fill(r);
+    return arr;
+}

test/stdcpp/src/array_test.d

@@ -0,0 +1,62 @@
+import core.stdcpp.array;
+
+extern (C++) int test_array()
+{
+    array!(int, 5) arr;
+    arr[] = [0, 2, 3, 4, 5];
+    ++arr.front;
+
+    assert(arr.size == 5);
+    assert(arr.length == 5);
+    assert(arr.max_size == 5);
+    assert(arr.empty == false);
+    assert(arr.front == 1);
+
+    assert(sumOfElements_val(arr)[0] == 160);
+    assert(sumOfElements_ref(arr)[0] == 15);
+
+    array!(int, 0) arr2;
+    assert(arr2.size == 0);
+    assert(arr2.length == 0);
+    assert(arr2.max_size == 0);
+    assert(arr2.empty == true);
+    assert(arr2[] == []);
+
+    return 0;
+}
+
+
+extern(C++):
+
+// test the ABI for calls to C++
+array!(int, 5) sumOfElements_val(array!(int, 5) arr);
+ref array!(int, 5) sumOfElements_ref(return ref array!(int, 5) arr);
+
+// test the ABI for calls from C++
+array!(int, 5) fromC_val(array!(int, 5) arr)
+{
+    assert(arr[] == [1, 2, 3, 4, 5]);
+    assert(arr.front == 1);
+    assert(arr.back == 5);
+    assert(arr.at(2) == 3);
+
+    arr.fill(2);
+
+    int r;
+    foreach (e; arr)
+        r += e;
+
+    assert(r == 10);
+
+    arr[] = r;
+    return arr;
+}
+
+ref array!(int, 5) fromC_ref(return ref array!(int, 5) arr)
+{
+    int r;
+    foreach (e; arr)
+        r += e;
+    arr[] = r;
+    return arr;
+}