Merge pull request #4782 from ethereum/encodePackedArrayOfStructs

Encode packed array of structs

test/libsolidity/syntaxTests/specialFunctions/encodePacked_array_of_structs.sol

@@ -0,0 +1,9 @@
+contract C {
+    struct S { uint x; }
+    function f() public pure {
+        S[] memory s;
+        abi.encodePacked(s);
+    }
+}
+// ----
+// TypeError: (116-117): This type cannot be encoded.

test/libsolidity/syntaxTests/specialFunctions/encode_array_of_struct.sol

@@ -0,0 +1,10 @@
+pragma experimental ABIEncoderV2;
+contract C {
+    struct S { uint x; }
+    function f() public pure {
+        S[] memory s;
+        abi.encode(s);
+    }
+}
+// ----
+// Warning: (0-33): Experimental features are turned on. Do not use experimental features on live deployments.