/*

Copyright (C) 2001-2016 Ben Sapp

This file is part of Octave.

Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

Octave is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#if ! defined (octave_pt_bp_h)
#define octave_pt_bp_h 1

#include "octave-config.h"

#include "input.h"
#include "ov-usr-fcn.h"
#include "pt-walk.h"
#include "pt-pr-code.h"
#include "interpreter.h"

namespace octave
{
  class tree;
  class tree_decl_command;

  class tree_breakpoint : public tree_walker
  {
  public:

    enum action { set = 1, clear = 2, list = 3 };

    tree_breakpoint (int l, action a, const std::string& c = "")
      : line (l), act (a), condition (c), found (false), bp_list () { }

    // No copying!

    tree_breakpoint (const tree_breakpoint&) = delete;

    tree_breakpoint& operator = (const tree_breakpoint&) = delete;

    ~tree_breakpoint (void) = default;

    bool success (void) const { return found; }

    void visit_argument_list (tree_argument_list&);

    void visit_binary_expression (tree_binary_expression&);

    void visit_break_command (tree_break_command&);

    void visit_colon_expression (tree_colon_expression&);

    void visit_continue_command (tree_continue_command&);

    void visit_global_command (tree_global_command&);

    void visit_persistent_command (tree_persistent_command&);

    void visit_decl_elt (tree_decl_elt&);

    void visit_decl_init_list (tree_decl_init_list&);

    void visit_while_command (tree_while_command&);

    void visit_do_until_command (tree_do_until_command&);

    void visit_simple_for_command (tree_simple_for_command&);

    void visit_complex_for_command (tree_complex_for_command&);

    void visit_octave_user_script (octave_user_script&);

    void visit_octave_user_function (octave_user_function&);

    void visit_octave_user_function_header (octave_user_function&);

    void visit_octave_user_function_trailer (octave_user_function&);

    void visit_function_def (tree_function_def&);

    void visit_identifier (tree_identifier&);

    void visit_if_clause (tree_if_clause&);

    void visit_if_command (tree_if_command&);

    void visit_if_command_list (tree_if_command_list&);

    void visit_index_expression (tree_index_expression&);

    void visit_matrix (tree_matrix&);

    void visit_cell (tree_cell&);

    void visit_multi_assignment (tree_multi_assignment&);

    void visit_no_op_command (tree_no_op_command&);

    void visit_anon_fcn_handle (tree_anon_fcn_handle&);

    void visit_constant (tree_constant&);

    void visit_fcn_handle (tree_fcn_handle&);

    void visit_funcall (tree_funcall&);

    void visit_parameter_list (tree_parameter_list&);

    void visit_postfix_expression (tree_postfix_expression&);

    void visit_prefix_expression (tree_prefix_expression&);

    void visit_return_command (tree_return_command&);

    void visit_return_list (tree_return_list&);

    void visit_simple_assignment (tree_simple_assignment&);

    void visit_statement (tree_statement&);

    void visit_statement_list (tree_statement_list&);

    void visit_switch_case (tree_switch_case&);

    void visit_switch_case_list (tree_switch_case_list&);

    void visit_switch_command (tree_switch_command&);

    void visit_try_catch_command (tree_try_catch_command&);

    void visit_unwind_protect_command (tree_unwind_protect_command&);

    octave_value_list get_list (void) { return bp_list; }
    octave_value_list get_cond_list (void) { return bp_cond_list; }

    int get_line (void) { return found ? line : 0; }

  private:

    void do_decl_command (tree_decl_command&);

    void take_action (tree& tr);

    void take_action (tree_statement& stmt);

    // Statement line number we are looking for.
    int line;

    // What to do.
    action act;

    // Expression which must be true to break
    std::string condition;

    // Have we already found the line?
    bool found;

    // List of breakpoint line numbers.
    octave_value_list bp_list;

    // List of breakpoint conditions.
    octave_value_list bp_cond_list;
  };

  // TRUE means SIGINT should put us in the debugger at the next
  // available breakpoint.
  extern bool octave_debug_on_interrupt_state;
}

#if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)

OCTAVE_DEPRECATED ("use 'octave::tree_breakpoint' instead")
typedef octave::tree_breakpoint tree_breakpoint;

#endif

#endif