Line data    Source code

       1              : /* valaswitchsection.vala
       2              :  *
       3              :  * Copyright (C) 2006-2010  Jürg Billeter
       4              :  *
       5              :  * This library is free software; you can redistribute it and/or
       6              :  * modify it under the terms of the GNU Lesser General Public
       7              :  * License as published by the Free Software Foundation; either
       8              :  * version 2.1 of the License, or (at your option) any later version.
       9              : 
      10              :  * This library is distributed in the hope that it will be useful,
      11              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      12              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13              :  * Lesser General Public License for more details.
      14              : 
      15              :  * You should have received a copy of the GNU Lesser General Public
      16              :  * License along with this library; if not, write to the Free Software
      17              :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
      18              :  *
      19              :  * Author:
      20              :  *      Jürg Billeter <j@bitron.ch>
      21              :  */
      22              : 
      23              : using GLib;
      24              : 
      25              : /**
      26              :  * Represents a switch section in the source code.
      27              :  */
      28         1186 : public class Vala.SwitchSection : Block {
      29         1154 :         private List<SwitchLabel> labels = new ArrayList<SwitchLabel> ();
      30              : 
      31              :         /**
      32              :          * Creates a new switch section.
      33              :          *
      34              :          * @param source_reference reference to source code
      35              :          * @return                 newly created switch section
      36              :          */
      37          577 :         public SwitchSection (SourceReference? source_reference = null) {
      38          577 :                 base (source_reference);
      39              :         }
      40              : 
      41              :         /**
      42              :          * Appends the specified label to the list of switch labels.
      43              :          *
      44              :          * @param label a switch label
      45              :          */
      46          669 :         public void add_label (SwitchLabel label) {
      47          669 :                 if (labels.size == 0) {
      48          576 :                         this.source_reference = label.source_reference;
      49              :                 }
      50              : 
      51          669 :                 labels.add (label);
      52          669 :                 label.parent_node = this;
      53              :         }
      54              : 
      55              :         /**
      56              :          * Returns the list of switch labels.
      57              :          *
      58              :          * @return switch label list
      59              :          */
      60         1672 :         public unowned List<SwitchLabel> get_labels () {
      61         1672 :                 return labels;
      62              :         }
      63              : 
      64         1280 :         public bool has_default_label () {
      65         3892 :                 foreach (SwitchLabel label in labels) {
      66         1470 :                         if (label.expression == null) {
      67          164 :                                 return true;
      68              :                         }
      69              :                 }
      70              : 
      71         1280 :                 return false;
      72              :         }
      73              : 
      74          579 :         public override void accept (CodeVisitor visitor) {
      75          579 :                 visitor.visit_switch_section (this);
      76              :         }
      77              : 
      78          579 :         public override void accept_children (CodeVisitor visitor) {
      79         1923 :                 foreach (SwitchLabel label in labels) {
      80          672 :                         label.accept (visitor);
      81              :                 }
      82              : 
      83          579 :                 base.accept_children (visitor);
      84              :         }
      85              : 
      86          571 :         public override bool check (CodeContext context) {
      87          571 :                 if (checked) {
      88            0 :                         return !error;
      89              :                 }
      90              : 
      91          571 :                 if (!(parent_node is SwitchStatement)) {
      92            1 :                         Report.error (source_reference, "no enclosing switch statement found");
      93            1 :                         error = true;
      94            1 :                         return false;
      95              :                 }
      96              : 
      97         1896 :                 foreach (SwitchLabel label in get_labels ()) {
      98          663 :                         label.check (context);
      99              :                 }
     100              : 
     101          570 :                 if (!base.check (context)) {
     102            1 :                         error = true;
     103              :                 }
     104              : 
     105          570 :                 checked = true;
     106              : 
     107          570 :                 return !error;
     108              :         }
     109              : 
     110          561 :         public override void emit (CodeGenerator codegen) {
     111         1869 :                 foreach (SwitchLabel label in labels) {
     112          654 :                         label.emit (codegen);
     113              :                 }
     114              : 
     115          561 :                 base.emit (codegen);
     116              :         }
     117              : }