Bound functions.

test/cmdlineTests/yul_unimplemented/err

@@ -1,5 +1,5 @@
 Error (1834): Unimplemented feature error in <FILENAME REMOVED>
- --> yul_unimplemented/input.sol:8:9:
+ --> yul_unimplemented/input.sol:5:16:
   |
-8 |         x.f();
-  |         ^^^^^
+5 |         return type(test).name;
+  |                ^^^^^^^^^^^^^^^

test/cmdlineTests/yul_unimplemented/input.sol

@@ -1,10 +1,7 @@
 // SPDX-License-Identifier: GPL-3.0
 pragma solidity >=0.0;
-library L { function f(uint) public {} }
 contract test {
-    using L for uint;
-    function f() public {
-        uint x;
-        x.f();
+    function f() public pure returns (string memory) {
+        return type(test).name;
     }
 }

test/libsolidity/semanticTests/libraries/bound_returning_calldata_external.sol

@@ -14,6 +14,7 @@ contract C {
     }
 }
 // ====
+// compileViaYul: also
 // EVMVersion: >homestead
 // ----
 // library: D

test/libsolidity/semanticTests/libraries/bound_to_calldata_external.sol

@@ -14,6 +14,7 @@ contract C {
     }
 }
 // ====
+// compileViaYul: also
 // EVMVersion: >homestead
 // ----
 // library: D

test/libsolidity/semanticTests/libraries/internal_call_bound_with_parentheses.sol

@@ -0,0 +1,27 @@
+library L {
+    struct S {
+        uint256[] data;
+    }
+
+    function f(S memory _s) internal {
+        _s.data[3] += 2;
+    }
+}
+
+
+contract C {
+    using L for L.S;
+
+    function f() public returns (uint256) {
+        L.S memory x;
+        x.data = new uint256[](7);
+        x.data[3] = 8;
+        (x.f)();
+        return x.data[3];
+    }
+}
+
+// ====
+// compileViaYul: also
+// ----
+// f() -> 0x0a

test/libsolidity/semanticTests/libraries/internal_library_function_bound_to_storage_string.sol

@@ -0,0 +1,22 @@
+library L {
+    function f(string memory a) internal pure returns (string memory) {
+        return a;
+    }
+    function g(string storage a) internal pure returns (string memory) {
+        return a;
+    }
+}
+
+contract C {
+    using L for string;
+    string s;
+
+    function test(string calldata x) public returns (string memory, string memory) {
+        s = x;
+        return (s.f(), s.g());
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test(string): 0x20, 3, "def" -> 0x40, 0x80, 3, "def", 3, "def"