Merge pull request #1573 from crytic/type-alias-using-for

fix type conversion of alias so library function can be found

slither/visitors/slithir/expression_to_slithir.py

@@ -282,10 +282,15 @@ class ExpressionToSlithIR(ExpressionVisitor):
             and expression_called.member_name in ["wrap", "unwrap"]
             and len(args) == 1
         ):
+            # wrap: underlying_type -> alias
+            # unwrap: alias -> underlying_type
+            dest_type = (
+                called if expression_called.member_name == "wrap" else called.underlying_type
+            )
             val = TemporaryVariable(self._node)
-            var = TypeConversion(val, args[0], called)
+            var = TypeConversion(val, args[0], dest_type)
             var.set_expression(expression)
-            val.set_type(called)
+            val.set_type(dest_type)
             self._result.append(var)
             set_val(expression, val)
 

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.10-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.11-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.12-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.13-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.14-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.15-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/expected/user_defined_value_type/using-for-0.8.8.sol-0.8.8-compact.json

@@ -0,0 +1,11 @@
+{
+  "MyLib": {
+    "a()": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: NEW VARIABLE 1\n\"];\n1->2;\n2[label=\"Node Type: RETURN 2\n\"];\n}\n"
+  },
+  "A": {
+    "b(MyType)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  },
+  "B": {
+    "c(uint256)": "digraph{\n0[label=\"Node Type: ENTRY_POINT 0\n\"];\n0->1;\n1[label=\"Node Type: RETURN 1\n\"];\n}\n"
+  }
+}

tests/ast-parsing/user_defined_value_type/using-for-0.8.8.sol

@@ -0,0 +1,22 @@
+type MyType is uint256;
+
+library MyLib {
+    using A for MyType;
+    using B for uint;
+    function a() internal returns(uint){
+        MyType myvar = MyType.wrap(4);
+        return MyType.unwrap(myvar.b()).c();
+    }
+}
+
+library A {
+    function b(MyType e) public returns(MyType){
+        return MyType.wrap(3);
+    }
+
+}
+library B {
+    function c(uint e) public returns(uint){
+        return 345;
+    }
+}

tests/test_ast_parsing.py

@@ -418,6 +418,7 @@ ALL_TESTS = [
     Test("user_defined_value_type/constant-0.8.8.sol", ["0.8.8"] + make_version(8, 10, 15)),
     Test("user_defined_value_type/erc20-0.8.8.sol", ["0.8.8"] + make_version(8, 10, 15)),
     Test("user_defined_value_type/in_parenthesis-0.8.8.sol", ["0.8.8"] + make_version(8, 10, 15)),
+    Test("user_defined_value_type/using-for-0.8.8.sol", ["0.8.8"] + make_version(8, 10, 15)),
     Test("bytes_call.sol", ["0.8.12"]),
     Test("modifier_identifier_path.sol", VERSIONS_08),
     Test("free_functions/libraries_from_free.sol", ["0.8.12"]),