Build and tests

setmscver.bat

@@ -9,5 +9,5 @@ if exist dflags.txt del /q dflags.txt
 if exist add_tests.txt del /q add_tests.txt
 if %_MSC_VER% GTR 1900 echo /std:c++17 > cflags.txt
 if %_MSC_VER% GTR 1900 echo -extern-std=c++17 > dflags.txt
-if %_MSC_VER% GTR 1900 echo string_view > add_tests.txt
+if %_MSC_VER% GTR 1900 echo optional string_view > add_tests.txt
 del ver.c ver_raw.txt

test/stdcpp/Makefile

@@ -4,7 +4,7 @@ HASCPP17:=`echo wow | $(CXX) -std=c++17 -E -xc++ - > /dev/null 2>&1 && echo yes`
 
 TESTS:=allocator new utility
 TESTS11:=array
-TESTS17:=string_view
+TESTS17:=optional string_view
 OLDABITESTS:=
 
 ifeq (osx,$(OS))

test/stdcpp/src/optional.cpp

@@ -0,0 +1,53 @@
+#include <optional>
+
+extern int opt_refCount;
+
+struct Complex
+{
+    bool valid = false;
+
+    int buffer[16] = { 10 };
+
+    Complex() = delete;
+    Complex(const Complex& rh)
+    {
+        valid = rh.valid;
+        if (rh.valid)
+        {
+            ++opt_refCount;
+            for (int i = 0; i < 16; ++i)
+                buffer[i] = rh.buffer[i];
+        }
+    }
+    ~Complex()
+    {
+        if (valid)
+            --opt_refCount;
+    }
+};
+
+int fromC_val(bool, std::optional<int>, const std::optional<int>&,
+    std::optional<void*>, const std::optional<void*>&,
+    std::optional<Complex>, const std::optional<Complex>&);
+
+int callC_val(bool set, std::optional<int> a1, const std::optional<int>& a2,
+    std::optional<void*> a3, const std::optional<void*>& a4,
+    std::optional<Complex> a5, const std::optional<Complex>& a6)
+{
+    if (set)
+    {
+        if (!a1 || a1.value() != 10) return 1;
+        if (!a2 || a2.value() != 10) return 1;
+        if (!a3 || a3.value() != (void*)0x1234) return 1;
+        if (!a4 || a4.value() != (void*)0x1234) return 1;
+        if (!a5 || a5.value().buffer[0] != 20 || a5.value().buffer[15] != 20) return 1;
+        if (!a6 || a6.value().buffer[0] != 20 || a6.value().buffer[15] != 20) return 1;
+    }
+    else
+    {
+        if (a1 || a2 || a3 || a4 || a5 || a6)
+            return 1;
+    }
+
+    return fromC_val(set, a1, a2, a3, a4, a5, a6);
+}

test/stdcpp/src/optional_test.d

@@ -0,0 +1,97 @@
+import core.stdcpp.optional;
+
+unittest
+{
+    optional!int o1;
+    optional!int o2 = nullopt;
+    auto o3 = optional!int(in_place, 10);
+    assert(!o1 && o2.has_value == false && o3 && o3.value == 10);
+    o1 = 20;
+    assert(o1 && o1.value == 20);
+    o1 = nullopt;
+    assert(!o1);
+    int temp = 30;
+    assert(o1.value_or(temp) == 30);
+
+    optional!(void*) o4;
+    auto o5 = optional!(void*)(in_place, cast(void*)0x1234);
+    assert(!o4 && o5 && o5.value == cast(void*)0x1234);
+    o4 = o5;
+    o5 = null;
+    assert(o5.value == null);
+    o5 = o4;
+    o5.reset();
+    assert(!o5);
+
+    {
+        optional!Complex o6;
+        auto o7 = optional!Complex(in_place, Complex(20));
+        assert(!o6 && o7 && o7.value.buffer[0] == 20 && o7.value.buffer[$-1] == 20);
+        optional!Complex o8 = o6;
+        assert(!o8);
+        optional!Complex o9 = o7;
+        assert(o9 && o9.value.buffer[0] == 20 && o9.value.buffer[$-1] == 20);
+        o9 = o6;
+        assert(!o9);
+        o6 = o7;
+        assert(o6 && o6.value.buffer[0] == 20 && o6.value.buffer[$-1] == 20);
+        o7.reset();
+        assert(!o7);
+
+        assert(callC_val(false, o1, o1, o5, o5, o7, o7) == 0);
+        assert(callC_val(true, o3, o3, o4, o4, o6, o6) == 0);
+    }
+    assert(opt_refCount == 0);
+}
+
+extern(C++):
+
+__gshared int opt_refCount = 0;
+
+struct Complex
+{
+    bool valid = false;
+    int[16] buffer;
+    this(int val)
+    {
+        valid = true;
+        buffer[] = val;
+        ++opt_refCount;
+    }
+    this(ref inout(Complex) rhs) inout
+    {
+        valid = rhs.valid;
+        if (rhs.valid)
+        {
+            buffer[] = rhs.buffer[]; ++opt_refCount;
+        }
+    }
+    ~this()
+    {
+        if (valid)
+            --opt_refCount;
+    }
+}
+
+int callC_val(bool, optional!int, ref const(optional!int), optional!(void*), ref const(optional!(void*)), optional!Complex, ref const(optional!Complex));
+
+int fromC_val(bool set, optional!int a1, ref const(optional!int) a2,
+              optional!(void*) a3, ref const(optional!(void*)) a4,
+              optional!Complex a5, ref const(optional!Complex) a6)
+{
+    if (set)
+    {
+        assert(a1 && a1.value == 10);
+        assert(a2 && a2.value == 10);
+        assert(a3 && a3.value == cast(void*)0x1234);
+        assert(a4 && a4.value == cast(void*)0x1234);
+        assert(a5 && a5.value.buffer[0] == 20 && a5.value.buffer[$-1] == 20);
+        assert(a6 && a6.value.buffer[0] == 20 && a6.value.buffer[$-1] == 20);
+    }
+    else
+    {
+        assert(!a1 && !a2 && !a3 && !a4 && !a5 && !a6);
+    }
+
+    return 0;
+}