Fix else ifs

tree.cpp

@@ -20,29 +20,29 @@ template <>
 std::string label<binop>(binop op) {
     switch(op) {
         case binop::plus:
-            return "+";
+            return "PLUS";
         case binop::minus:
-            return "-";
+            return "MINUS";
         case binop::times:
-            return "*";
+            return "TIMES";
         case binop::divide:
-            return "/";
+            return "DIVIDEBY";
         case binop::land:
-            return "&&";
+            return "AND";
         case binop::lor:
-            return "||";
+            return "OR";
         case binop::eq:
-            return "==";
+            return "EQ";
         case binop::neq:
-            return "!=";
+            return "NEQ";
         case binop::lt:
-            return "<";
+            return "LT";
         case binop::lte:
-            return "<=";
+            return "LTE";
         case binop::gt:
-            return ">";
+            return "GT";
         case binop::gte:
-            return ">=";
+            return "GTE";
         default:
             return "";
     }
@@ -59,20 +59,20 @@ std::string label<unop>(unop op) {
 }
 
 template <typename T>
-std::string wrap_label(T v) {
-    return std::string(" [label=\"") + label(v) + "\"]";
+std::string wrap_label(T v, bool box = false) {
+    return std::string(" [label=\"") + label(v) + "\" " + (box ? "shape=\"box\"" : "") + "]";
 }
 
 void expr_id::print_dot(dot& into, std::string prefix) {
-    into.push_back(prefix + wrap_label(id));
+    into.push_back(prefix + wrap_label(std::string("identifier: ") + id, true));
 }
 
 void expr_int::print_dot(dot& into, std::string prefix) {
-    into.push_back(prefix + wrap_label(val));
+    into.push_back(prefix + wrap_label(std::string("integer: ") + label(val), true));
 }
 
 void expr_float::print_dot(dot& into, std::string prefix) {
-    into.push_back(prefix + wrap_label(val));
+    into.push_back(prefix + wrap_label(std::string("float: ") + label(val), true));
 }
 
 void expr_binop::print_dot(dot& into, std::string prefix) {