Add tests to increase TypeChecker.cpp coverage

test/libsolidity/syntaxTests/array/new_no_parentheses.sol

@@ -0,0 +1,7 @@
+contract C {
+    function f(uint size) public {
+        new uint[1];
+    }
+}
+// ----
+// TypeError: (60-67): Length has to be placed in parentheses after the array type for new expression.

test/libsolidity/syntaxTests/constructor/not_a_contract.sol

@@ -0,0 +1,9 @@
+// This used to cause an internal error because of the visitation order.
+contract Test {
+    struct S { uint a; }
+    function f() public {
+       new S();
+    }
+}
+// ----
+// TypeError: (147-152): Identifier is not a contract.

test/libsolidity/syntaxTests/inheritance/wrong_type_base_arguments.sol

@@ -0,0 +1,9 @@
+contract Base {
+  constructor(uint8) public {}
+}
+contract Derived is Base(300) { }
+contract Derived2 is Base {
+  constructor() Base(2) public { }
+}
+// ----
+// TypeError: (74-77): Invalid type for argument in constructor call. Invalid implicit conversion from int_const 300 to uint8 requested.

test/libsolidity/syntaxTests/memberLookup/member_not_unique.sol

@@ -0,0 +1,13 @@
+contract C {
+    function a(uint256) public returns (uint) { return 1; }
+    function a(uint8) public returns (uint) { return 1; }
+
+    function f() public returns (C) { return this; }
+
+    function g() internal returns (function(uint8) internal returns(uint))
+    {
+        return f().a;
+    }
+}
+// ----
+// TypeError: (282-287): Member "a" not unique after argument-dependent lookup in contract C.

test/libsolidity/syntaxTests/memberLookup/member_value_not_unique.sol

@@ -0,0 +1,13 @@
+contract C {
+    function value(uint256) public returns (uint) { return 1; }
+    function value(uint8) public returns (uint) { return 1; }
+
+    function f() public returns (C) { return this; }
+
+    function g() internal returns (function(uint8) internal returns(uint))
+    {
+        return f().value;
+    }
+}
+// ----
+// TypeError: (290-299): Member "value" not unique after argument-dependent lookup in contract C - did you forget the "payable" modifier?

test/libsolidity/syntaxTests/nameAndTypeResolution/typeChecking/return_tuple_not_convertible.sol

@@ -0,0 +1,5 @@
+contract test {
+    function f() public returns (uint256 r, uint8) { return ((12, "")); }
+}
+// ----
+// TypeError: (76-86): Return argument type tuple(int_const 12,literal_string "") is not implicitly convertible to expected type tuple(uint256,uint8).

test/libsolidity/syntaxTests/types/var_type_invalid_rational.sol

@@ -0,0 +1,8 @@
+contract C {
+    function f() internal pure {
+        var i = 31415999999999999999999999999999999999999999999999999999999999999999933**3;
+        var unreachable = 123;
+    }
+}
+// ----
+// TypeError: (62-136): Invalid rational int_const 3100...(204 digits omitted)...9237 (absolute value too large or division by zero).

test/libsolidity/syntaxTests/types/var_type_suggest.sol

@@ -6,6 +6,7 @@ contract C {
         return x;
     }
     function f() internal pure {
+        var s = -31415;
         var i = 31415;
         var t = "string";
         var g2 = g;
@@ -19,17 +20,18 @@ contract C {
     }
 }
 // ----
-// SyntaxError: (224-237): Use of the "var" keyword is disallowed. Use explicit declaration `uint16 i = ...´ instead.
-// SyntaxError: (247-263): Use of the "var" keyword is disallowed. Use explicit declaration `string memory t = ...´ instead.
-// SyntaxError: (273-283): Use of the "var" keyword is disallowed. Use explicit declaration `function (uint256) pure returns (uint256) g2 = ...´ instead.
-// SyntaxError: (293-326): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
-// SyntaxError: (336-360): Use of the "var" keyword is disallowed. Use explicit declaration `(uint8 a, string memory b) = ...´ instead.
-// SyntaxError: (370-387): Use of the "var" keyword is disallowed. Use explicit declaration `(uint256 x, , uint256 z) = ...´ instead.
-// TypeError: (397-414): Different number of components on the left hand side (2) than on the right hand side (1).
-// SyntaxError: (397-414): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
-// TypeError: (424-440): Different number of components on the left hand side (2) than on the right hand side (1).
-// SyntaxError: (424-440): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
-// TypeError: (450-464): Different number of components on the left hand side (2) than on the right hand side (1).
-// SyntaxError: (450-464): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
-// TypeError: (474-489): Different number of components on the left hand side (2) than on the right hand side (1).
-// SyntaxError: (474-489): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
+// SyntaxError: (224-238): Use of the "var" keyword is disallowed. Use explicit declaration `int16 s = ...´ instead.
+// SyntaxError: (248-261): Use of the "var" keyword is disallowed. Use explicit declaration `uint16 i = ...´ instead.
+// SyntaxError: (271-287): Use of the "var" keyword is disallowed. Use explicit declaration `string memory t = ...´ instead.
+// SyntaxError: (297-307): Use of the "var" keyword is disallowed. Use explicit declaration `function (uint256) pure returns (uint256) g2 = ...´ instead.
+// SyntaxError: (317-350): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
+// SyntaxError: (360-384): Use of the "var" keyword is disallowed. Use explicit declaration `(uint8 a, string memory b) = ...´ instead.
+// SyntaxError: (394-411): Use of the "var" keyword is disallowed. Use explicit declaration `(uint256 x, , uint256 z) = ...´ instead.
+// TypeError: (421-438): Different number of components on the left hand side (2) than on the right hand side (1).
+// SyntaxError: (421-438): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
+// TypeError: (448-464): Different number of components on the left hand side (2) than on the right hand side (1).
+// SyntaxError: (448-464): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
+// TypeError: (474-488): Different number of components on the left hand side (2) than on the right hand side (1).
+// SyntaxError: (474-488): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.
+// TypeError: (498-513): Different number of components on the left hand side (2) than on the right hand side (1).
+// SyntaxError: (498-513): Use of the "var" keyword is disallowed. Type cannot be expressed in syntax.