Merge b92d8d1 into 5dcb10d

dub.sdl

@@ -5,3 +5,7 @@ homepage "https://github.com/msoucy/painlesstraits"
 authors "Edwin van Leeuwen" "Pierre Krafft" "Matt Soucy"
 license "BSL-1.0"
 targetType "library"
+configuration "unittest" {
+	sourcePaths "source" "test"
+	importPaths "source" "test"
+}

source/painlesstraits.d

@@ -190,6 +190,38 @@ unittest {
     assert( foo.failure(1) == 1 );
 }
 
+private template publicMemberFilter(T, alias filter)
+{
+    template Filter(alias memberName)
+    {
+        static if (is(typeof(__traits(getMember, T.init, memberName))))
+        {
+            static if (__traits(compiles, { enum Foo = __traits(getMember, T.init, memberName); }))
+            {
+                enum Filter = filter!(__traits(getMember, T.init, memberName));
+            }
+            else
+                enum Filter = false;
+        }
+        else
+            enum Filter = false;
+    }
+}
+
+template allPublicFieldsOrProperties(T)
+{
+    import std.meta : Filter;
+    enum allPublicFieldsOrProperties = Filter!(publicMemberFilter!(T, isFieldOrProperty).Filter, __traits(allMembers, T));
+    static assert(allPublicFieldsOrProperties.length > 0, "No properties for type " ~ T.stringof);
+}
+
+template allPublicFields(T)
+{
+    import std.meta : Filter;
+    enum allPublicFields = Filter!(publicMemberFilter!(T, isField).Filter, __traits(allMembers, T));
+    static assert(allPublicFields.length > 0, "No properties for type " ~ T.stringof);
+}
+
 unittest {
     import std.typecons : Tuple;
     // toString is template, should be ignored

test/publicmembers.d

@@ -0,0 +1,43 @@
+import painlesstraits;
+
+unittest {
+    struct TestStruct
+    {
+        int i = 5;
+        string str = "a";
+        long l;
+        private double b;
+        static ubyte s;
+
+        void foo()
+        {
+        }
+
+        int bar() @property
+        {
+            return i;
+        }
+
+        this(int j)
+        {
+            i = j;
+        }
+
+        void hello()()
+        {
+        }
+    }
+
+    alias members = allPublicFieldsOrProperties!TestStruct;
+    static assert(members.length == 4);
+    static assert(members[0] == "i");
+    static assert(members[1] == "str");
+    static assert(members[2] == "l");
+    static assert(members[3] == "bar");
+
+    alias fields = allPublicFields!TestStruct;
+    static assert(fields.length == 3);
+    static assert(fields[0] == "i");
+    static assert(fields[1] == "str");
+    static assert(fields[2] == "l");
+}