Merge pull request #3745 from ethereum/fixRecursion

Fix invalid recursion errors for structs

test/libsolidity/syntaxTests/constants/cyclic_dependency_1.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint constant a = a;
+}
+// ----
+// TypeError: The value of the constant a has a cyclic dependency via a.

test/libsolidity/syntaxTests/constants/cyclic_dependency_2.sol

@@ -0,0 +1,10 @@
+contract C {
+    uint constant a = b * c;
+    uint constant b = 7;
+    uint constant c = b + uint(keccak256(d));
+    uint constant d = 2 + a;
+}
+// ----
+// TypeError: The value of the constant a has a cyclic dependency via c.
+// TypeError: The value of the constant c has a cyclic dependency via d.
+// TypeError: The value of the constant d has a cyclic dependency via a.

test/libsolidity/syntaxTests/constants/cyclic_dependency_3.sol

@@ -0,0 +1,11 @@
+contract C {
+    uint constant x = a;
+    uint constant a = b * c;
+    uint constant b = c;
+    uint constant c = b;
+}
+// ----
+// TypeError: The value of the constant x has a cyclic dependency via a.
+// TypeError: The value of the constant a has a cyclic dependency via b.
+// TypeError: The value of the constant b has a cyclic dependency via c.
+// TypeError: The value of the constant c has a cyclic dependency via b.

test/libsolidity/syntaxTests/constants/cyclic_dependency_4.sol

@@ -0,0 +1,6 @@
+contract C {
+    uint constant a = b * c;
+    uint constant b = 7;
+    uint constant c = 4 + uint(keccak256(d));
+    uint constant d = 2 + b;
+}

test/libsolidity/syntaxTests/structs/recursion/multi_struct_composition.sol

@@ -0,0 +1,15 @@
+pragma experimental ABIEncoderV2;
+
+contract C {
+  struct T { U u; V v; }
+
+  struct U { W w; }
+
+  struct V { W w; }
+
+  struct W { uint x; }
+
+  function f(T) public pure { }
+}
+// ----
+// Warning: Experimental features are turned on. Do not use experimental features on live deployments.

test/libsolidity/syntaxTests/structs/recursion/parallel_structs.sol

@@ -0,0 +1,15 @@
+pragma experimental ABIEncoderV2;
+
+contract TestContract
+{
+    struct SubStruct {
+        uint256 id;
+    }
+    struct TestStruct {
+        SubStruct subStruct1;
+        SubStruct subStruct2;
+    }
+    function addTestStruct(TestStruct) public pure {}
+}
+// ----
+// Warning: Experimental features are turned on. Do not use experimental features on live deployments.

test/libsolidity/syntaxTests/structs/recursion/return_recursive_structs.sol

@@ -0,0 +1,7 @@
+contract C {
+    struct S { uint a; S[] sub; }
+    function f() public pure returns (uint, S) {
+    }
+}
+// ----
+// TypeError: Internal or recursive type is not allowed for public or external functions.

test/libsolidity/syntaxTests/structs/recursion/return_recursive_structs2.sol

@@ -0,0 +1,7 @@
+contract C {
+    struct S { uint a; S[2][] sub; }
+    function f() public pure returns (uint, S) {
+    }
+}
+// ----
+// TypeError: Internal or recursive type is not allowed for public or external functions.

test/libsolidity/syntaxTests/structs/recursion/return_recursive_structs3.sol

@@ -0,0 +1,8 @@
+contract C {
+    struct S { uint a; S[][][] sub; }
+    struct T { S s; }
+    function f() public pure returns (uint x, T t) {
+    }
+}
+// ----
+// TypeError: Internal or recursive type is not allowed for public or external functions.

test/libsolidity/syntaxTests/structs/recursion/struct_definition_directly_recursive.sol

@@ -0,0 +1,8 @@
+contract Test {
+    struct MyStructName {
+        address addr;
+        MyStructName x;
+    }
+}
+// ----
+// TypeError: Recursive struct definition.

test/libsolidity/syntaxTests/structs/recursion/struct_definition_indirectly_recursive.sol

@@ -0,0 +1,12 @@
+contract Test {
+    struct MyStructName1 {
+        address addr;
+        uint256 count;
+        MyStructName2 x;
+    }
+    struct MyStructName2 {
+        MyStructName1 x;
+    }
+}
+// ----
+// TypeError: Recursive struct definition.

test/libsolidity/syntaxTests/structs/recursion/struct_definition_not_really_recursive.sol

@@ -0,0 +1,4 @@
+contract Test {
+    struct S1 { uint a; }
+    struct S2 { S1 x; S1 y; }
+}

test/libsolidity/syntaxTests/structs/recursion/struct_definition_recursion_via_mapping.sol

@@ -0,0 +1,7 @@
+contract Test {
+    struct MyStructName1 {
+        address addr;
+        uint256 count;
+        mapping(uint => MyStructName1) x;
+    }
+}