Tidy up code to generate default branch of case

tgt-vhdl/stmt.cc

@@ -461,30 +461,27 @@ static int draw_case(vhdl_procedural *proc, stmt_container *container,
    
    int nbranches = ivl_stmt_case_count(stmt);
    for (int i = 0; i < nbranches; i++) {
-      vhdl_expr *when;
+      stmt_container *container;
       ivl_expr_t net = ivl_stmt_case_expr(stmt, i);
       if (net) {
-         when = translate_expr(net)->cast(test->get_type());
+         vhdl_expr *when = translate_expr(net)->cast(test->get_type());
          if (NULL == when)
             return 1;
+
+         vhdl_case_branch *branch = new vhdl_case_branch(when);
+         vhdlcase->add_branch(branch);
+         container = branch->get_container();
       }
       else {
-         when = new vhdl_var_ref("others", NULL);
+         container = vhdlcase->get_others_container();
          have_others = true;
       }
       
-      vhdl_case_branch *branch = new vhdl_case_branch(when);
-      vhdlcase->add_branch(branch);
-      
-      draw_stmt(proc, branch->get_container(), ivl_stmt_case_stmt(stmt, i));
+      draw_stmt(proc, container, ivl_stmt_case_stmt(stmt, i));
    }
 
-   if (!have_others) {
-      vhdl_case_branch *others =
-         new vhdl_case_branch(new vhdl_var_ref("others", NULL));
-      others->get_container()->add_stmt(new vhdl_null_stmt());
-      vhdlcase->add_branch(others);
-   }      
+   if (!have_others)
+      vhdlcase->get_others_container()->add_stmt(new vhdl_null_stmt());
    
    return 0;
 }

tgt-vhdl/vhdl_syntax.cc

@@ -734,6 +734,11 @@ void vhdl_case_stmt::emit(std::ostream &of, int level) const
    case_branch_list_t::const_iterator it;
    for (it = branches_.begin(); it != branches_.end(); ++it)
       (*it)->emit(of, level);
+
+   if (!others_.empty()) {
+      of << "when others =>";
+      others_.emit(of, indent(level));
+   }
    
    of << "end case;";
 }

tgt-vhdl/vhdl_syntax.hh

@@ -367,9 +367,11 @@ public:
 
    void add_branch(vhdl_case_branch *b) { branches_.push_back(b); }
    void emit(std::ostream &of, int level) const;
+   stmt_container *get_others_container() { return &others_; }
 private:
    vhdl_expr *test_;
    case_branch_list_t branches_;
+   stmt_container others_;
 };