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test for visibility of nested function in scripts called from parent function * nest.tst: New tests.
author John W. Eaton <jwe@octave.org>
date Wed, 08 Apr 2020 15:59:56 -0400
parents bd51beb6205e
children 286fe9352cd6
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2006-2020 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
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24 ########################################################################
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25
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26 ################################################################################
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27 ## This file actually executes the tests on nested functions.
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28 ##
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29 ## It relies on the function files defined in the nest/ directory.
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30 ################################################################################
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31
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32 %!test
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33 %! assert (recursive_nest (), 25)
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34 %! clear -global recursive_nest_inc; # cleanup after test
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35
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36 %!assert (recursive_nest2 (), 20)
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37
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38 %!assert (recursive_nest3 (), 5)
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39
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40 %!assert (script_nest (), 5)
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41
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42 %!assert (arg_ret (), 10)
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43
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44 %!assert (arg_nest, 1)
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45
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46 %!assert (varg_nest (-1), 6)
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47
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48 %!assert (varg_nest2, 5)
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49
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50 %!test
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51 %! scope0;
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52
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53 %!test
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54 %! scope1 (1);
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55
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56 %!test
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57 %! scope3;
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58
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59 %!assert (nest_eval ("x = 5;", "x = 6;"), 6)
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60
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61 %!error <can not add variable "y" to a static workspace>
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62 %! nest_eval ("x = 5;", "y = 6;");
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63
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64 %!error <can not add variable "y" to a static workspace>
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65 %! nest_eval ("x = -5; x = abs (x);", "y = 6;")
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66
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67 %!test
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68 %! f = no_closure (0);
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69 %! assert (f("foo"), "nested foo");
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70 %! assert (f("foo"), "nested foo");
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71
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72 %!test <*39257>
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73 %! f = no_closure (1);
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74 %! assert (f(), "nested");
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75 %! assert (f("foo"), "nested foo");
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76
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77 %!error <D' undefined near line 7> scope2
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78 %!error <can not add variable "y" to a static workspace> nest_eval ("y = 5;", "")
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79 %!error <can not add variable "y" to a static workspace> nest_eval ("y;", "")
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80
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81 ## Test the way that non-local variables referenced by nested functions
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82 ## work with function handles.
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83
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84 ## FH1 and FH2 were created separately so will have distinct
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85 ## closure contexts.handles, FH3 is a copy of FH2 so they will
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86 ## share the same context.
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87
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88 %!test <*39257>
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89 %! fh1 = nst1 (13);
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90 %! fh2 = nst1 (13);
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91 %! fh3 = fh2;
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92 %!
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93 %! assert (fh1 (), 13);
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94 %! assert (fh2 (), 13);
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95 %! assert (fh3 (), 13);
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96 %!
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97 %! assert (fh1 (42), 42);
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98 %! assert (fh2 (), 13);
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99 %! assert (fh3 (), 13);
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100 %!
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101 %! assert (fh2 (pi), pi);
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102 %! assert (fh1 (), 42);
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103 %! assert (fh3 (), pi);
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104
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105 ## Similar to the test above, but with persistent variables. These are
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106 ## stored in the function, not the closure context, so are shared among
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107 ## all handles whether they are created separately or copied.
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108
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109 %!test
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110 %! fh1 = nst2 (13);
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111 %! fh2 = nst2 (13);
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112 %! fh3 = fh2;
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113 %!
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114 %! assert (fh1 (), 13);
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115 %! assert (fh2 (), 13);
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116 %! assert (fh3 (), 13);
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117 %!
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118 %! assert (fh1 (42), 42);
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119 %! assert (fh2 (), 42);
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120 %! assert (fh3 (), 42);
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121 %!
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122 %! assert (fh2 (pi), pi);
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123 %! assert (fh1 (), pi);
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124 %! assert (fh3 (), pi);
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125
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126 ## And again with global variables.
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127
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128 %!test
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129 %! fh1 = nst3 (13);
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130 %! fh2 = nst3 (13);
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131 %! fh3 = fh2;
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132 %!
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133 %! assert (fh1 (), 13);
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134 %! assert (fh2 (), 13);
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135 %! assert (fh3 (), 13);
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136 %!
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137 %! assert (fh1 (42), 42);
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138 %! assert (fh2 (), 42);
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139 %! assert (fh3 (), 42);
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140 %!
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141 %! assert (fh2 (pi), pi);
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142 %! assert (fh1 (), pi);
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143 %! assert (fh3 (), pi);
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144 %!
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145 %! clear -global g; # cleanup after tests
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146
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147 ## Test case from <https://stackoverflow.com/q/26238491/6579744>
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148 %!test
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149 %! f1 = counter ();
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150 %! f2 = counter ();
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151 %! observed = [f1(), f1(), f2(), f1(), f2()];
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152 %! assert (observed, [1, 2, 1, 3, 2]);
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153
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154 ## Test visibility of nested function from script called from parent.
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155 %!assert (script_nest_2 (42), 84);
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156 %!error script_nest_2 (0)