Allow mappings of arrays as arguments and return values of internal functions.

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

@@ -0,0 +1,6 @@
+contract C {
+    function f(mapping(uint => uint)[] storage) external pure {
+    }
+}
+// ----
+// TypeError: (28-51): Location has to be calldata for external functions (remove the "memory" or "storage" keyword).

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

@@ -0,0 +1,5 @@
+contract C {
+    function f(mapping(uint => uint)[] storage) internal pure {
+    }
+}
+// ----

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

@@ -0,0 +1,5 @@
+contract C {
+    function f(mapping(uint => uint)[] storage) private pure {
+    }
+}
+// ----

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

@@ -0,0 +1,6 @@
+contract C {
+    function f(mapping(uint => uint)[] storage) public pure {
+    }
+}
+// ----
+// TypeError: (28-51): Location has to be memory for publicly visible functions (remove the "storage" or "calldata" keyword).

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

@@ -0,0 +1,6 @@
+library L {
+    function f(mapping(uint => uint)[] storage) external pure {
+    }
+}
+// ----
+// TypeError: (27-50): Type is required to live outside storage.

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

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

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

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

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

@@ -0,0 +1,6 @@
+library L {
+    function f(mapping(uint => uint)[] storage) public pure {
+    }
+}
+// ----
+// TypeError: (27-50): Type is required to live outside storage.

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

@@ -0,0 +1,6 @@
+contract C {
+    function f() external pure returns (mapping(uint=>uint)[] storage m) {
+    }
+}
+// ----
+// TypeError: (53-84): Location has to be memory for publicly visible functions (remove the "storage" or "calldata" keyword).

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

@@ -0,0 +1,16 @@
+contract C {
+    mapping(uint=>uint)[] m;
+    function f() internal view returns (mapping(uint=>uint)[] storage) {
+        return m;
+    }
+    function g() private view returns (mapping(uint=>uint)[] storage) {
+        return m;
+    }
+    function h() internal view returns (mapping(uint=>uint)[] storage r) {
+        r = m;
+    }
+    function i() private view returns (mapping(uint=>uint)[] storage r) {
+        (r,r) = (m,m);
+    }
+}
+// ----

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

@@ -0,0 +1,6 @@
+contract C {
+    function f() public pure returns (mapping(uint=>uint)[] storage m) {
+    }
+}
+// ----
+// TypeError: (51-82): Location has to be memory for publicly visible functions (remove the "storage" or "calldata" keyword).