source/handy_http_primitives/optional.d

@@ -100,12 +100,6 @@ struct Optional(T) {
             * Returns: An exception if one is thrown.
             */
             SerdeException deserializeFromAsdf(Asdf data) {
-                static if (!__traits(compiles, {T t; t = T.init;})) {
-                    return new SerdeException(
-                        "Cannot deserialize Optional that contains immutable or otherwise unassignable value. " ~
-                        "Ensure that the following code compiles: T t; t = T.init; for the given type T."
-                    );
-                } else {
                 if (data == null) {
                     this.isNull = true;
                     this.value = T.init;
@@ -115,7 +109,6 @@ struct Optional(T) {
                 }
                 return null;
             }
-            }
 
             /**
             * Serializes an optional value to allow for the automatic serialization
@@ -123,11 +116,11 @@ struct Optional(T) {
             * Params:
             *   serializer = The serializer to use (provided by ASDF).
             */
-            void serialize(S)(ref S serializer) const {
+            void serialize(S)(ref S serializer) {
                 if (this.isNull) {
                     serializer.putValue(null);
                 } else {
-                    serializeValue(serializer, this.value);
+                    serializer.putValue(this.value);
                 }
             }
         }
@@ -147,18 +140,6 @@ auto mapIfPresent(alias fn, T)(Optional!T opt) {
     return Optional!U.of(fn(opt.value));
 }
 
-/**
- * Helper function to get an Optional value for an existing value. Due to D's
- * type inference, you can simply write `auto opt = toOptional(x);` to avoid
- * having to write out types when constructing optionals.
- * Params:
- *   t = The value to construct an optional from.
- * Returns: The optional with the given value.
- */
-Optional!T toOptional(T)(T t) {
-    return Optional!T.of(t);
-}
-
 unittest {
     Optional!string s = Optional!string.of("hello");
     assert(!s.isNull);
@@ -202,29 +183,5 @@ unittest {
         assert(sa.b && sa.b.value == "hello world!");
         assert(sa.c && sa.c.value == 3.14f);
         assert(sa.d && sa.d.value == Sd(42, 67));
-
-        // Check that optionals containing immutable data aren't supported for serialization & deserialization:
-        struct Invalid {
-            immutable int x;
-        }
-        Optional!Invalid opt = Optional!(Invalid).of(Invalid(42));
-        static assert(__traits(compiles, serializeToJson(opt)));
-        try {
-            deserialize!(Optional!(Invalid))(`{"x": 123}`);
-            assert(
-                false,
-                "Failed to ensure that an exception is thrown when attempting to deserialize an incompatible Optional."
-            );
-        } catch (SerdeException exc) {
-            // pass.
     }
 }
-}
-
-// Tests for toOptional.
-unittest {
-    int x = 5;
-    auto optX = x.toOptional;
-    assert(!optX.isNull);
-    assert(optX.value == 5);
-}