/*

Copyright (C) 1996-2017 John W. Eaton

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_unop_h)
#define octave_pt_unop_h 1

#include "octave-config.h"

#include <string>

class octave_value;
class octave_value_list;

#include "pt-exp.h"
#include "pt-walk.h"
#include "symtab.h"

namespace octave
{
  // Unary expressions.

  class tree_unary_expression : public tree_expression
  {
  protected:

    tree_unary_expression (int l = -1, int c = -1,
                           octave_value::unary_op t
                           = octave_value::unknown_unary_op)
      : tree_expression (l, c), op (0), etype (t)  { }

    tree_unary_expression (tree_expression *e, int l = -1, int c = -1,
                           octave_value::unary_op t
                           = octave_value::unknown_unary_op)
      : tree_expression (l, c), op (e), etype (t) { }

  public:

    // No copying!

    tree_unary_expression (const tree_unary_expression&) = delete;

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

    ~tree_unary_expression (void) { delete op; }

    bool is_unary_expression (void) const { return true; }

    bool has_magic_end (void) const { return (op && op->has_magic_end ()); }

    tree_expression * operand (void) { return op; }

    std::string oper (void) const;

    octave_value::unary_op op_type (void) const { return etype; }

  protected:

    // The operand for the expression.
    tree_expression *op;

    // The type of the expression.
    octave_value::unary_op etype;
  };

  // Prefix expressions.

  class tree_prefix_expression : public tree_unary_expression
  {
  public:

    tree_prefix_expression (int l = -1, int c = -1)
      : tree_unary_expression (l, c, octave_value::unknown_unary_op) { }

    tree_prefix_expression (tree_expression *e, int l = -1, int c = -1,
                            octave_value::unary_op t
                            = octave_value::unknown_unary_op)
      : tree_unary_expression (e, l, c, t) { }

    // No copying!

    tree_prefix_expression (const tree_prefix_expression&) = delete;

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

    ~tree_prefix_expression (void) = default;

    bool rvalue_ok (void) const { return true; }

    tree_expression * dup (symbol_table::scope_id scope,
                           symbol_table::context_id context) const;

    void accept (tree_walker& tw)
    {
      tw.visit_prefix_expression (*this);
    }

    std::string profiler_name (void) const { return "prefix " + oper (); }
  };

  // Postfix expressions.

  class tree_postfix_expression : public tree_unary_expression
  {
  public:

    tree_postfix_expression (int l = -1, int c = -1)
      : tree_unary_expression (l, c, octave_value::unknown_unary_op) { }

    tree_postfix_expression (tree_expression *e, int l = -1, int c = -1,
                             octave_value::unary_op t
                             = octave_value::unknown_unary_op)
      : tree_unary_expression (e, l, c, t) { }

    // No copying!

    tree_postfix_expression (const tree_postfix_expression&) = delete;

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

    ~tree_postfix_expression (void) = default;

    bool rvalue_ok (void) const { return true; }

    tree_expression * dup (symbol_table::scope_id scope,
                           symbol_table::context_id context) const;

    void accept (tree_walker& tw)
    {
      tw.visit_postfix_expression (*this);
    }

    std::string profiler_name (void) const { return "postfix " + oper (); }
  };
}

#if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)

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

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

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

#endif

#endif