New test cases.

test/libsolidity/syntaxTests/dataLocations/libraries/library_function_parameters_with_data_location_fine.sol

@@ -0,0 +1,8 @@
+library L {
+    // Warning for no data location provided can be silenced with storage or memory.
+    function f(uint[] memory, uint[] storage) private pure {}
+    function g(uint[] memory, uint[] storage) internal pure {}
+    function h(uint[] memory) public pure {}
+    // No warning on external functions, because of default to calldata.
+    function i(uint[]) external pure {}
+}

test/libsolidity/syntaxTests/dataLocations/libraries/library_internal_function_return_parameters_no_data_location.sol

@@ -0,0 +1,5 @@
+library L {
+    function g(uint[]) internal pure {}
+}
+// ----
+// TypeError: (27-33): Storage location must be "storage" or "memory" for parameter in internal function, but none was given.

test/libsolidity/syntaxTests/dataLocations/libraries/library_private_function_parameters_no_data_location.sol

@@ -0,0 +1,5 @@
+library L {
+    function h(uint[]) public pure {}
+}
+// ----
+// TypeError: (27-33): Storage location must be "storage" or "memory" for parameter in public function, but none was given.

test/libsolidity/syntaxTests/dataLocations/libraries/library_public_function_return_parameters_no_data_location.sol

@@ -0,0 +1,5 @@
+library L {
+    function h(uint[]) public pure {}
+}
+// ----
+// TypeError: (27-33): Storage location must be "storage" or "memory" for parameter in public function, but none was given.