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1 Summary of changes for version 3.0: |
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2 ---------------------------------- |
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3 |
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4 * Previous versions of Octave had a number of built-in variables to |
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5 control warnings (for example, warn_divide_by_zero). These |
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6 variables have been replaced by warning identifiers that are used |
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7 with the warning function to control the state of warnings. Now, |
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8 instead of writing |
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9 |
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10 warn_divide_by_zero = false; |
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11 |
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12 to disable divide-by-zero warnings, you should write |
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13 |
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14 warning ("off", "Octave:divide-by-zero"); |
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15 |
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16 You may use the same technique in your own code to control |
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17 warnings. For example, you can use |
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18 |
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19 warning ("My-package:phase-of-the-moon", |
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20 "the phase of the moon could cause trouble today"); |
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21 |
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22 to allow users to control this warning using the |
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23 "My-package:phase-of-the-moon" warning identifier. |
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24 |
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25 You may also enable or disable all warnings, or turn them into |
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26 errors: |
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27 |
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28 warning ("on", "all"); |
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29 warning ("off", "all"); |
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30 warning ("error", "Octave:divide-by-zero"); |
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31 warning ("error", "all"); |
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32 |
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33 You can query the state of current warnings using |
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34 |
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35 warning ("query", ID) |
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36 warning ("query") |
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37 |
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38 (only those warning IDs which have been explicitly set are |
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39 returned). |
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40 |
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41 A partial list and description of warning identifiers is available |
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42 using |
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43 |
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44 help warning_ids |
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45 |
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46 |
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47 See NEWS.2 for old news. |
