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annotate libinterp/parse-tree/pt-binop.cc @ 17281:bc924baa2c4e

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doc: Add new @qcode macro for code samples which are quoted. Macro handles options ("on") or properties ("position") more elegantly than @code{"text"}. * doc/interpreter/macros.texi: Add new @qcode macro. * doc/interpreter/tips.txi: Add documentation about @qcode macro. * doc/interpreter/basics.txi, doc/interpreter/container.txi, doc/interpreter/emacs.txi, doc/interpreter/errors.txi, doc/interpreter/eval.txi, doc/interpreter/expr.txi, doc/interpreter/external.txi, doc/interpreter/func.txi, doc/interpreter/grammar.txi, doc/interpreter/image.txi, doc/interpreter/install.txi, doc/interpreter/interp.txi, doc/interpreter/io.txi, doc/interpreter/matrix.txi, doc/interpreter/numbers.txi, doc/interpreter/oop.txi, doc/interpreter/package.txi, doc/interpreter/plot.txi, doc/interpreter/quad.txi, doc/interpreter/sparse.txi, doc/interpreter/strings.txi, doc/interpreter/system.txi, doc/interpreter/vectorize.txi, libinterp/corefcn/balance.cc, libinterp/corefcn/bitfcns.cc, libinterp/corefcn/cellfun.cc, libinterp/corefcn/conv2.cc, libinterp/corefcn/data.cc, libinterp/corefcn/debug.cc, libinterp/corefcn/defaults.cc, libinterp/corefcn/dirfns.cc, libinterp/corefcn/dlmread.cc, libinterp/corefcn/error.cc, libinterp/corefcn/file-io.cc, libinterp/corefcn/find.cc, libinterp/corefcn/gammainc.cc, libinterp/corefcn/graphics.cc, libinterp/corefcn/help.cc, libinterp/corefcn/hex2num.cc, libinterp/corefcn/input.cc, libinterp/corefcn/load-path.cc, libinterp/corefcn/load-save.cc, libinterp/corefcn/ls-oct-ascii.cc, libinterp/corefcn/lu.cc, libinterp/corefcn/luinc.cc, libinterp/corefcn/matrix_type.cc, libinterp/corefcn/oct-hist.cc, libinterp/corefcn/pager.cc, libinterp/corefcn/pr-output.cc, libinterp/corefcn/pt-jit.cc, libinterp/corefcn/qz.cc, libinterp/corefcn/rand.cc, libinterp/corefcn/regexp.cc, libinterp/corefcn/schur.cc, libinterp/corefcn/sighandlers.cc, libinterp/corefcn/sparse.cc, libinterp/corefcn/spparms.cc, libinterp/corefcn/str2double.cc, libinterp/corefcn/svd.cc, libinterp/corefcn/symtab.cc, libinterp/corefcn/syscalls.cc, libinterp/corefcn/toplev.cc, libinterp/corefcn/tril.cc, libinterp/corefcn/typecast.cc, libinterp/corefcn/utils.cc, libinterp/corefcn/variables.cc, libinterp/dldfcn/__init_fltk__.cc, libinterp/dldfcn/chol.cc, libinterp/dldfcn/colamd.cc, libinterp/dldfcn/fftw.cc, libinterp/dldfcn/qr.cc, libinterp/dldfcn/symbfact.cc, libinterp/octave-value/ov-base.cc, libinterp/octave-value/ov-fcn-handle.cc, libinterp/octave-value/ov-fcn-inline.cc, libinterp/octave-value/ov-java.cc, libinterp/octave-value/ov-range.cc, libinterp/octave-value/ov-struct.cc, libinterp/octave-value/ov-usr-fcn.cc, libinterp/parse-tree/oct-parse.in.yy, libinterp/parse-tree/pt-binop.cc, libinterp/parse-tree/pt-eval.cc, libinterp/parse-tree/pt-mat.cc, scripts/@ftp/ftp.m, scripts/deprecated/java_convert_matrix.m, scripts/deprecated/java_debug.m, scripts/deprecated/java_unsigned_conversion.m, scripts/deprecated/shell_cmd.m, scripts/general/dblquad.m, scripts/general/display.m, scripts/general/genvarname.m, scripts/general/idivide.m, scripts/general/interp1.m, scripts/general/interp2.m, scripts/general/interp3.m, scripts/general/interpn.m, scripts/general/isa.m, scripts/general/profexplore.m, scripts/general/profile.m, scripts/general/quadgk.m, scripts/general/randi.m, scripts/general/structfun.m, scripts/general/subsindex.m, scripts/general/triplequad.m, scripts/geometry/griddata.m, scripts/geometry/griddata3.m, scripts/geometry/griddatan.m, scripts/geometry/voronoi.m, scripts/help/help.m, scripts/help/lookfor.m, scripts/image/cmpermute.m, scripts/image/colormap.m, scripts/image/image.m, scripts/image/imagesc.m, scripts/image/imfinfo.m, scripts/image/imformats.m, scripts/image/imread.m, scripts/image/imshow.m, scripts/image/imwrite.m, scripts/image/ind2gray.m, scripts/image/lines.m, scripts/image/rgb2ind.m, scripts/image/spinmap.m, scripts/io/dlmwrite.m, scripts/io/strread.m, scripts/io/textread.m, scripts/io/textscan.m, scripts/java/javaclasspath.m, scripts/java/usejava.m, scripts/miscellaneous/bzip2.m, scripts/miscellaneous/computer.m, scripts/miscellaneous/copyfile.m, scripts/miscellaneous/debug.m, scripts/miscellaneous/dos.m, scripts/miscellaneous/edit.m, scripts/miscellaneous/gzip.m, scripts/miscellaneous/license.m, scripts/miscellaneous/mkoctfile.m, scripts/miscellaneous/movefile.m, scripts/miscellaneous/parseparams.m, scripts/miscellaneous/unix.m, scripts/optimization/fminbnd.m, scripts/optimization/fminsearch.m, scripts/optimization/fminunc.m, scripts/optimization/fsolve.m, scripts/optimization/fzero.m, scripts/optimization/glpk.m, scripts/optimization/lsqnonneg.m, scripts/optimization/optimset.m, scripts/optimization/pqpnonneg.m, scripts/pkg/pkg.m, scripts/plot/allchild.m, scripts/plot/ancestor.m, scripts/plot/area.m, scripts/plot/axis.m, scripts/plot/bar.m, scripts/plot/barh.m, scripts/plot/box.m, scripts/plot/caxis.m, scripts/plot/cla.m, scripts/plot/clabel.m, scripts/plot/clf.m, scripts/plot/close.m, scripts/plot/colorbar.m, scripts/plot/daspect.m, scripts/plot/ezmesh.m, scripts/plot/ezmeshc.m, scripts/plot/ezsurf.m, scripts/plot/ezsurfc.m, scripts/plot/findall.m, scripts/plot/findobj.m, scripts/plot/gcbo.m, scripts/plot/gcf.m, scripts/plot/gco.m, scripts/plot/grid.m, scripts/plot/guihandles.m, scripts/plot/hdl2struct.m, scripts/plot/hidden.m, scripts/plot/hold.m, scripts/plot/isonormals.m, scripts/plot/isosurface.m, scripts/plot/legend.m, scripts/plot/mesh.m, scripts/plot/meshc.m, scripts/plot/meshz.m, scripts/plot/newplot.m, scripts/plot/orient.m, scripts/plot/pareto.m, scripts/plot/patch.m, scripts/plot/pbaspect.m, scripts/plot/pcolor.m, scripts/plot/plot.m, scripts/plot/print.m, scripts/plot/private/__add_default_menu__.m, scripts/plot/quiver.m, scripts/plot/quiver3.m, scripts/plot/refreshdata.m, scripts/plot/saveas.m, scripts/plot/scatter.m, scripts/plot/scatter3.m, scripts/plot/shading.m, scripts/plot/shrinkfaces.m, scripts/plot/slice.m, scripts/plot/stem.m, scripts/plot/stem3.m, scripts/plot/struct2hdl.m, scripts/plot/subplot.m, scripts/plot/surf.m, scripts/plot/surfc.m, scripts/plot/surfl.m, scripts/plot/tetramesh.m, scripts/plot/uigetfile.m, scripts/plot/uimenu.m, scripts/plot/uiputfile.m, scripts/plot/waterfall.m, scripts/plot/whitebg.m, scripts/plot/xlim.m, scripts/plot/ylim.m, scripts/plot/zlim.m, scripts/polynomial/conv.m, scripts/polynomial/polyout.m, scripts/polynomial/splinefit.m, scripts/set/ismember.m, scripts/set/powerset.m, scripts/set/setdiff.m, scripts/set/union.m, scripts/set/unique.m, scripts/signal/detrend.m, scripts/signal/filter2.m, scripts/signal/freqz.m, scripts/signal/periodogram.m, scripts/signal/spectral_adf.m, scripts/signal/spectral_xdf.m, scripts/sparse/eigs.m, scripts/sparse/svds.m, scripts/specfun/legendre.m, scripts/special-matrix/gallery.m, scripts/statistics/base/mean.m, scripts/statistics/base/moment.m, scripts/statistics/tests/cor_test.m, scripts/statistics/tests/kolmogorov_smirnov_test.m, scripts/statistics/tests/kolmogorov_smirnov_test_2.m, scripts/statistics/tests/kruskal_wallis_test.m, scripts/statistics/tests/prop_test_2.m, scripts/statistics/tests/sign_test.m, scripts/statistics/tests/t_test.m, scripts/statistics/tests/t_test_2.m, scripts/statistics/tests/t_test_regression.m, scripts/statistics/tests/u_test.m, scripts/statistics/tests/var_test.m, scripts/statistics/tests/welch_test.m, scripts/statistics/tests/wilcoxon_test.m, scripts/statistics/tests/z_test.m, scripts/statistics/tests/z_test_2.m, scripts/strings/base2dec.m, scripts/strings/index.m, scripts/strings/isstrprop.m, scripts/strings/mat2str.m, scripts/strings/regexptranslate.m, scripts/strings/rindex.m, scripts/strings/str2num.m, scripts/strings/strcat.m, scripts/strings/strjust.m, scripts/strings/strmatch.m, scripts/strings/validatestring.m, scripts/testfun/demo.m, scripts/testfun/example.m, scripts/testfun/test.m, scripts/time/addtodate.m, scripts/time/asctime.m, scripts/time/datestr.m, scripts/time/datetick.m, scripts/time/weekday.m, scripts/ui/errordlg.m, scripts/ui/helpdlg.m, scripts/ui/inputdlg.m, scripts/ui/listdlg.m, scripts/ui/msgbox.m, scripts/ui/questdlg.m, scripts/ui/warndlg.m: Use new @qcode macro.
author Rik <rik@octave.org>
date Mon, 19 Aug 2013 20:46:38 -0700
parents 049e8bbff782
children d63878346099
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1 /*
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2
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72c96de7a403 maint: update copyright notices for 2012
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3 Copyright (C) 1996-2012 John W. Eaton
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4
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5 This file is part of Octave.
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6
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "error.h"
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28 #include "defun.h"
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29 #include "oct-obj.h"
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30 #include "ov.h"
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31 #include "profiler.h"
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32 #include "pt-binop.h"
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33 #include "pt-bp.h"
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34 #include "pt-walk.h"
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35 #include "variables.h"
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36
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37 // TRUE means we mark | and & expressions for braindead short-circuit
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38 // behavior.
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39 static bool Vdo_braindead_shortcircuit_evaluation;
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40
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41 // Binary expressions.
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42
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43 octave_value_list
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44 tree_binary_expression::rvalue (int nargout)
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45 {
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46 octave_value_list retval;
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47
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48 if (nargout > 1)
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49 error ("binary operator '%s': invalid number of output arguments",
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50 oper () . c_str ());
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51 else
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52 retval = rvalue1 (nargout);
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53
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54 return retval;
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55 }
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56
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57 octave_value
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58 tree_binary_expression::rvalue1 (int)
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59 {
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60 octave_value retval;
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61
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62 if (error_state)
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63 return retval;
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64
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65 if (Vdo_braindead_shortcircuit_evaluation
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66 && eligible_for_braindead_shortcircuit)
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67 {
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68 if (op_lhs)
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69 {
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70 octave_value a = op_lhs->rvalue1 ();
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71
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72 if (! error_state)
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73 {
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74 if (a.ndims () == 2 && a.rows () == 1 && a.columns () == 1)
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75 {
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76 bool result = false;
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77
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78 bool a_true = a.is_true ();
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79
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80 if (! error_state)
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81 {
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82 if (a_true)
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83 {
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84 if (etype == octave_value::op_el_or)
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85 {
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86 result = true;
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87 goto done;
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88 }
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89 }
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90 else
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91 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
92 if (etype == octave_value::op_el_and)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
93 goto done;
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
94 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
95
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
96 if (op_rhs)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
97 {
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
98 octave_value b = op_rhs->rvalue1 ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
99
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
100 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
101 result = b.is_true ();
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
102 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
103
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
104 done:
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
105
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
106 if (! error_state)
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
107 return octave_value (result);
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
108 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
109 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
110 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
111 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
112 }
5677f3f7b5fa Matlab compatible short-circuit behavior for & and | operators
John W. Eaton <jwe@octave.org>
parents: 10315
diff changeset
113
2980
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jwe
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diff changeset
114 if (op_lhs)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
115 {
8658
73c4516fae10 New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents: 8011
diff changeset
116 octave_value a = op_lhs->rvalue1 ();
2980
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jwe
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diff changeset
117
8011
3100283874d7 improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents: 7767
diff changeset
118 if (! error_state && a.is_defined () && op_rhs)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
119 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
120 octave_value b = op_rhs->rvalue1 ();
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
121
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
122 if (! error_state && b.is_defined ())
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
123 {
12960
43d78e103984 Use macro to start profiler blocks.
Daniel Kraft <d@domob.eu>
parents: 12921
diff changeset
124 BEGIN_PROFILER_BLOCK ("binary " + oper ())
12920
5d18231eee00 Extend profiling support to operators.
Daniel Kraft <d@domob.eu>
parents: 12822
diff changeset
125
12921
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
126 // Note: The profiler does not catch the braindead
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
127 // short-circuit evaluation code above, but that should be
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
128 // ok. The evaluation of operands and the operator itself
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
129 // is entangled and it's not clear where to start/stop
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
130 // timing the operator to make it reasonable.
12920
5d18231eee00 Extend profiling support to operators.
Daniel Kraft <d@domob.eu>
parents: 12822
diff changeset
131
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
132 retval = ::do_binary_op (etype, a, b);
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
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diff changeset
133
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
134 if (error_state)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
135 retval = octave_value ();
12960
43d78e103984 Use macro to start profiler blocks.
Daniel Kraft <d@domob.eu>
parents: 12921
diff changeset
136
43d78e103984 Use macro to start profiler blocks.
Daniel Kraft <d@domob.eu>
parents: 12921
diff changeset
137 END_PROFILER_BLOCK
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
138 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
139 }
2980
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jwe
parents:
diff changeset
140 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
141
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
142 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
143 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
144
3536
e8fbc8c3d6d9 [project @ 2000-02-02 12:01:00 by jwe]
jwe
parents: 3534
diff changeset
145 std::string
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
146 tree_binary_expression::oper (void) const
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
147 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
148 return octave_value::binary_op_as_string (etype);
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
149 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
150
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
151 tree_expression *
7767
71f068b22fcc scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents: 7336
diff changeset
152 tree_binary_expression::dup (symbol_table::scope_id scope,
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
153 symbol_table::context_id context) const
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
154 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
155 tree_binary_expression *new_be
7767
71f068b22fcc scope and context fixes for function handles
John W. Eaton <jwe@octave.org>
parents: 7336
diff changeset
156 = new tree_binary_expression (op_lhs ? op_lhs->dup (scope, context) : 0,
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
157 op_rhs ? op_rhs->dup (scope, context) : 0,
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
158 line (), column (), etype);
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
159
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
160 new_be->copy_base (*this);
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
161
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
162 return new_be;
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
163 }
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5307
diff changeset
164
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
165 void
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
166 tree_binary_expression::accept (tree_walker& tw)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
167 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
168 tw.visit_binary_expression (*this);
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
169 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
170
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
171 // Boolean expressions.
11586
12df7854fa7c strip trailing whitespace from source files
John W. Eaton <jwe@octave.org>
parents: 11572
diff changeset
172
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
173 octave_value_list
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
174 tree_boolean_expression::rvalue (int nargout)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
175 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
176 octave_value_list retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
177
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
178 if (nargout > 1)
15466
d174210ce1ec use ' instead of ` in error messages, warnings and most comments
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
179 error ("binary operator '%s': invalid number of output arguments",
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
180 oper () . c_str ());
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
181 else
8658
73c4516fae10 New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents: 8011
diff changeset
182 retval = rvalue1 (nargout);
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
183
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
184 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
185 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
186
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
187 octave_value
8658
73c4516fae10 New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents: 8011
diff changeset
188 tree_boolean_expression::rvalue1 (int)
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
189 {
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
190 octave_value retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
191
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
192 if (error_state)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
193 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
194
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
195 bool result = false;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
196
12921
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
197 // This evaluation is not caught by the profiler, since we can't find
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
198 // a reasonable place where to time. Note that we don't want to
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
199 // include evaluation of LHS or RHS into the timing, but this is
7820a12baadd Style fixes on comments about profiling operators
Jordi Gutiérrez Hermoso <jordigh@gmail.com>
parents: 12920
diff changeset
200 // entangled together with short-circuit evaluation here.
12920
5d18231eee00 Extend profiling support to operators.
Daniel Kraft <d@domob.eu>
parents: 12822
diff changeset
201
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
202 if (op_lhs)
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
203 {
8658
73c4516fae10 New evaluator and debugger derived from tree-walker class
John W. Eaton <jwe@octave.org>
parents: 8011
diff changeset
204 octave_value a = op_lhs->rvalue1 ();
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
205
8011
3100283874d7 improve backtrace error messages
John W. Eaton <jwe@octave.org>
parents: 7767
diff changeset
206 if (! error_state)
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
207 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
208 bool a_true = a.is_true ();
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
209
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
210 if (! error_state)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
211 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
212 if (a_true)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
213 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
214 if (etype == bool_or)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
215 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
216 result = true;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
217 goto done;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
218 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
219 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
220 else
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
221 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
222 if (etype == bool_and)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
223 goto done;
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
224 }
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
225
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
226 if (op_rhs)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
227 {
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
228 octave_value b = op_rhs->rvalue1 ();
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
229
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
230 if (! error_state)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
231 result = b.is_true ();
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
232 }
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
233
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
234 done:
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
235
10315
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
236 if (! error_state)
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
237 retval = octave_value (result);
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
238 }
57a59eae83cc untabify src C++ source files
John W. Eaton <jwe@octave.org>
parents: 10160
diff changeset
239 }
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
240 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
241
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
242 return retval;
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
243 }
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
244
3536
e8fbc8c3d6d9 [project @ 2000-02-02 12:01:00 by jwe]
jwe
parents: 3534
diff changeset
245 std::string
2980
cd5ad3fd8049 [project @ 1997-05-16 01:12:13 by jwe]
jwe
parents:
diff changeset
246 tree_boolean_expression::oper (void) const
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247 {
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248 std::string retval = "<unknown>";
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249
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250 switch (etype)
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251 {
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252 case bool_and:
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253 retval = "&&";
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254 break;
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255
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256 case bool_or:
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257 retval = "||";
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258 break;
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259
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260 default:
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261 break;
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262 }
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263
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264 return retval;
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265 }
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266
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267 tree_expression *
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268 tree_boolean_expression::dup (symbol_table::scope_id scope,
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269 symbol_table::context_id context) const
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270 {
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271 tree_boolean_expression *new_be
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272 = new tree_boolean_expression (op_lhs ? op_lhs->dup (scope, context) : 0,
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273 op_rhs ? op_rhs->dup (scope, context) : 0,
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274 line (), column (), etype);
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275
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276 new_be->copy_base (*this);
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277
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278 return new_be;
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279 }
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280
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281 DEFUN (do_braindead_shortcircuit_evaluation, args, nargout,
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282 "-*- texinfo -*-\n\
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283 @deftypefn {Built-in Function} {@var{val} =} do_braindead_shortcircuit_evaluation ()\n\
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284 @deftypefnx {Built-in Function} {@var{old_val} =} do_braindead_shortcircuit_evaluation (@var{new_val})\n\
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285 @deftypefnx {Built-in Function} {} do_braindead_shortcircuit_evaluation (@var{new_val}, \"local\")\n\
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286 Query or set the internal variable that controls whether Octave will\n\
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287 do short-circuit evaluation of @samp{|} and @samp{&} operators inside the\n\
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288 conditions of if or while statements.\n\
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289 \n\
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290 This feature is only provided for compatibility with @sc{matlab} and should\n\
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291 not be used unless you are porting old code that relies on this feature.\n\
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292 \n\
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293 To obtain short-circuit behavior for logical expressions in new programs,\n\
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294 you should always use the @samp{&&} and @samp{||} operators.\n\
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295 \n\
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296 When called from inside a function with the @qcode{\"local\"} option, the\n\
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297 variable is changed locally for the function and any subroutines it calls. \n\
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298 The original variable value is restored when exiting the function.\n\
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299 @end deftypefn")
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300 {
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301 return SET_INTERNAL_VARIABLE (do_braindead_shortcircuit_evaluation);
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302 }
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303
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304 /*
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305 %!test
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306 %! x = 0;
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307 %! do_braindead_shortcircuit_evaluation (0);
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308 %! if (1 | (x = 1))
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309 %! endif
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310 %! assert (x, 1);
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311 %! do_braindead_shortcircuit_evaluation (1);
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312 %! if (1 | (x = 0))
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313 %! endif
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314 %! assert (x, 1);
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315 */