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annotate libinterp/parse-tree/pt.cc @ 27474:3fec8e9fa2aa

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make recover_from_exception a member function * interpreter.h, interpreter.cc (interpreter::recover_from_exception): Now a member function. Change all uses.
author John W. Eaton <jwe@octave.org>
date Fri, 04 Oct 2019 16:40:30 -0400
parents fd32c1a9b1bd
children b442ec6dda5c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996-2019 John W. Eaton
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4
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5 This file is part of Octave.
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6
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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
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your 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
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License 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 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if defined (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 <sstream>
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28 #include <string>
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29
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30 #include "interpreter.h"
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31 #include "ov-fcn.h"
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32 #include "pt.h"
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33 #include "pt-eval.h"
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34 #include "pt-pr-code.h"
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35 #include "unwind-prot.h"
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36
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37 namespace octave
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38 {
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39 // Hide the details of the string buffer so that we are less likely to
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40 // create a memory leak.
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41
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42 std::string
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43 tree::str_print_code (void)
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44 {
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45 std::ostringstream buf;
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46
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47 tree_print_code tpc (buf);
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48
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49 accept (tpc);
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50
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51 std::string retval = buf.str ();
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52
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53 return retval;
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54 }
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55
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56 // Is the current breakpoint condition met?
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57
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58 bool
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59 tree::meets_bp_condition (tree_evaluator& tw) const
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60 {
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61 bool retval;
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62 if (m_bp_cond == nullptr)
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63 retval = false;
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64 else if (m_bp_cond->empty ()) // empty condition always met
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65 retval = true;
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66 else
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67 {
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68 int parse_status = 0;
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69
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70 unwind_protect frame;
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71
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72 interpreter_try (frame);
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73
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74 retval = true; // default to stopping if any error
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75 try
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76 {
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77 octave_value_list val
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78 = tw.eval_string (*m_bp_cond, 1, parse_status, 1);
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79
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80 if (parse_status == 0)
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81 {
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82 if (! val(0).is_scalar_type ())
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83 warning ("Breakpoint condition must be a scalar, not size %s",
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84 val(0).dims ().str ('x').c_str ());
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85 else
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86 retval = val(0).bool_value ();
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87 }
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88 else
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89 warning ("Error parsing breakpoint condition");
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90 }
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91 catch (const execution_exception& e)
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92 {
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93 interpreter& interp = tw.get_interpreter ();
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94
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95 interp.recover_from_exception ();
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96
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97 std::string tmp = e.message ();
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98
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99 warning ("Error evaluating breakpoint condition:\n %s",
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100 tmp.c_str ());
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101 }
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102 }
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103
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104 return retval;
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105 }
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106 }