Allow mapping arguments and return values in internal library functions.

test/libsolidity/syntaxTests/types/mapping/argument_external.sol

@@ -0,0 +1,7 @@
+contract C {
+    function f(mapping(uint => uint) storage) external pure {
+    }
+}
+// ----
+// TypeError: (28-49): Type is required to live outside storage.
+// TypeError: (28-49): Internal or recursive type is not allowed for public or external functions.

test/libsolidity/syntaxTests/types/mapping/argument_internal.sol

@@ -0,0 +1,7 @@
+// This is expected to fail now, but may work in the future.
+contract C {
+    function f(mapping(uint => uint) storage) internal pure {
+    }
+}
+// ----
+// TypeError: (89-110): Type is required to live outside storage.

test/libsolidity/syntaxTests/types/mapping/argument_private.sol

@@ -0,0 +1,7 @@
+// This is expected to fail now, but may work in the future.
+contract C {
+    function f(mapping(uint => uint) storage) private pure {
+    }
+}
+// ----
+// TypeError: (89-110): Type is required to live outside storage.

test/libsolidity/syntaxTests/types/mapping/argument_public.sol

@@ -0,0 +1,7 @@
+contract C {
+    function f(mapping(uint => uint) storage) public pure {
+    }
+}
+// ----
+// TypeError: (28-49): Type is required to live outside storage.
+// TypeError: (28-49): Internal or recursive type is not allowed for public or external functions.

test/libsolidity/syntaxTests/types/mapping/library_argument_external.sol

@@ -0,0 +1,6 @@
+library L {
+    function f(mapping(uint => uint) storage) external pure {
+    }
+}
+// ----
+// TypeError: (27-48): Type is required to live outside storage.

test/libsolidity/syntaxTests/types/mapping/library_argument_internal.sol

@@ -0,0 +1,4 @@
+library L {
+    function f(mapping(uint => uint) storage) internal pure {
+    }
+}

test/libsolidity/syntaxTests/types/mapping/library_argument_private.sol

@@ -0,0 +1,4 @@
+library L {
+    function f(mapping(uint => uint) storage) private pure {
+    }
+}

test/libsolidity/syntaxTests/types/mapping/library_argument_public.sol

@@ -0,0 +1,6 @@
+library L {
+    function f(mapping(uint => uint) storage) public pure {
+    }
+}
+// ----
+// TypeError: (27-48): Type is required to live outside storage.

test/libsolidity/syntaxTests/types/mapping/library_return_external.sol

@@ -0,0 +1,10 @@
+library L
+{
+    function f(mapping(uint => uint) storage a, mapping(uint => uint) storage b, bool c) external pure returns(mapping(uint => uint) storage) {
+        return c ? a : b;
+    }
+}
+// ----
+// TypeError: (27-58): Type is required to live outside storage.
+// TypeError: (60-91): Type is required to live outside storage.
+// TypeError: (123-144): Type is required to live outside storage.

test/libsolidity/syntaxTests/types/mapping/library_return_internal.sol

@@ -0,0 +1,6 @@
+library L
+{
+    function f(mapping(uint => uint) storage a, mapping(uint => uint) storage b, bool c) internal pure returns(mapping(uint => uint) storage) {
+        return c ? a : b;
+    }
+}

test/libsolidity/syntaxTests/types/mapping/library_return_private.sol

@@ -0,0 +1,6 @@
+library L
+{
+    function f(mapping(uint => uint) storage a, mapping(uint => uint) storage b, bool c) private pure returns(mapping(uint => uint) storage) {
+        return c ? a : b;
+    }
+}

test/libsolidity/syntaxTests/types/mapping/library_return_public.sol

@@ -0,0 +1,10 @@
+library L
+{
+    function f(mapping(uint => uint) storage a, mapping(uint => uint) storage b, bool c) public pure returns(mapping(uint => uint) storage) {
+        return c ? a : b;
+    }
+}
+// ----
+// TypeError: (27-58): Type is required to live outside storage.
+// TypeError: (60-91): Type is required to live outside storage.
+// TypeError: (121-142): Type is required to live outside storage.