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1 @c Copyright (C) 1996, 1997 John W. Eaton |
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2 @c This is part of the Octave manual. |
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3 @c For copying conditions, see the file gpl.texi. |
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4 |
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5 @node Grammar |
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6 @appendix Grammar |
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7 @cindex grammar rules |
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8 @cindex language definition |
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9 |
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10 Someday I hope to expand this to include a semi-formal description of |
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11 Octave's language. |
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12 |
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13 @menu |
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14 * Keywords:: |
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15 @end menu |
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16 |
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17 @node Keywords |
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18 @section Keywords |
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19 @cindex keywords |
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20 |
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21 The following identifiers are keywords, and may not be used as variable |
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22 or function names: |
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23 |
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24 @example |
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25 @group |
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26 break for |
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27 case function |
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28 catch global |
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29 continue gplot |
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30 else gsplot |
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31 elseif if |
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32 end otherwise |
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33 end_try_catch return |
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34 end_unwind_protect switch |
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35 endfor try |
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36 endfunction unwind_protect |
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37 endif unwind_protect_cleanup |
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38 endswitch while |
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39 endwhile |
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40 @end group |
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41 @end example |
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42 |
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43 The following command-like functions are also speical. They may be used |
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44 as simple variable names, but not as formal parameters for functions, or |
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45 as the names of structure variables. Failed assignments leave them |
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46 undefined (you can recover the orginal definition as a function using |
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47 clear). |
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48 |
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49 @example |
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50 @group |
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51 casesen echo load show |
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52 cd edit_history ls type |
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53 chdir format more which |
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54 clear help run_history who |
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55 diary history save whos |
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56 dir hold set |
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57 @end group |
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58 @end example |
