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annotate examples/code/globaldemo.cc @ 20794:e5986cba4ca8

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new octave_value::cell_value method with optional error message * ov.h, ov.cc (octave_value::cell_value): New method. * ov-base.h, ov-base.cc (octave_base_value::cell_value): New default method. * ov-cell.h, ov-cell.cc (octave_cell::cell_value): New method.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Oct 2015 14:41:49 -0400
parents 2f8500ca91d3
children
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1 #include <octave/oct.h>
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2
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3 DEFUN_DLD (globaldemo, args, , "Global Demo")
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4 {
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5 octave_value retval;
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6
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7 if (args.length () != 1)
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8 print_usage ();
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9
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10 std::string s = args(0).string_value ();
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11
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12 octave_value tmp = get_global_value (s, true);
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13
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14 if (tmp.is_defined ())
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15 retval = tmp;
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16 else
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17 retval = "Global variable not found";
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18
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19 set_global_value ("a", 42.0);
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20
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21 return retval;
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22 }