Better error message when trying to call things that are not functions

test/libsolidity/syntaxTests/functionCalls/enum_value_not_callable.sol

@@ -0,0 +1,7 @@
+enum E { A, B, C }
+
+contract C {
+    uint a = E.B(1000);
+}
+// ----
+// TypeError 5704: (46-55): Enum is not callable.

test/libsolidity/syntaxTests/functionCalls/int_not_callable.sol

@@ -5,4 +5,4 @@ contract C
     }
 }
 // ----
-// TypeError 5704: (53-60): Type is not callable
+// TypeError 5704: (53-60): Rational number literal is not callable.

test/libsolidity/syntaxTests/functionCalls/magic_not_callable.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint a = msg(1000);
+}
+// ----
+// TypeError 5704: (26-35): Magic variable is not callable.

test/libsolidity/syntaxTests/functionCalls/mapping_not_callable.sol

@@ -0,0 +1,6 @@
+contract C {
+    mapping (uint => uint) m;
+    uint a = m(1000);
+}
+// ----
+// TypeError 5704: (56-63): Mapping is not callable.

test/libsolidity/syntaxTests/functionCalls/modifier_not_callable.sol

@@ -0,0 +1,7 @@
+contract C {
+    uint a = m(1000);
+
+    modifier m(uint) { _; }
+}
+// ----
+// TypeError 5704: (26-33): Modifier is not callable.

test/libsolidity/syntaxTests/functionCalls/module_not_callable.sol

@@ -0,0 +1,9 @@
+==== Source: A.sol ====
+==== Source: B.sol ====
+import "A.sol" as A;
+
+contract C {
+    uint a = A(1000);
+}
+// ----
+// TypeError 5704: (B.sol:48-55): Module is not callable.

test/libsolidity/syntaxTests/functionCalls/this_not_callable.sol

@@ -6,4 +6,4 @@ contract C {
     }
 }
 // ----
-// TypeError 5704: (72-78): Type is not callable
+// TypeError 5704: (72-78): Contract is not callable.