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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1994-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// 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
// <https://www.gnu.org/licenses/>.
//
////////////////////////////////////////////////////////////////////////
#if ! defined (octave_pt_misc_h)
#define octave_pt_misc_h 1
#include "octave-config.h"
#include "base-list.h"
#include "pt-decl.h"
#include "pt-walk.h"
namespace octave
{
class symbol_scope;
class tree_identifier;
class tree_index_expression;
// Parameter lists. Used to hold the list of input and output
// parameters in a function definition. Elements are identifiers
// only.
class tree_parameter_list : public base_list<tree_decl_elt *>
{
public:
enum in_or_out
{
in = 1,
out = 2
};
tree_parameter_list (in_or_out io)
: m_in_or_out (io), m_marked_for_varargs (0)
{ }
tree_parameter_list (in_or_out io, tree_decl_elt *t)
: m_in_or_out (io), m_marked_for_varargs (0)
{
append (t);
}
tree_parameter_list (in_or_out io, tree_identifier *id)
: m_in_or_out (io), m_marked_for_varargs (0)
{
append (new tree_decl_elt (id));
}
// No copying!
tree_parameter_list (const tree_parameter_list&) = delete;
tree_parameter_list& operator = (const tree_parameter_list&) = delete;
~tree_parameter_list (void);
void mark_as_formal_parameters (void);
void mark_varargs (void) { m_marked_for_varargs = 1; }
void mark_varargs_only (void) { m_marked_for_varargs = -1; }
bool takes_varargs (void) const { return m_marked_for_varargs != 0; }
bool varargs_only (void) { return (m_marked_for_varargs < 0); }
bool is_input_list (void) const { return m_in_or_out == in; }
bool is_output_list (void) const { return m_in_or_out == out; }
std::list<std::string> variable_names (void) const;
std::string varargs_symbol_name (void) const
{
return m_in_or_out == in ? "varargin" : "varargout";
}
tree_parameter_list * dup (symbol_scope& scope) const;
void accept (tree_walker& tw)
{
tw.visit_parameter_list (*this);
}
private:
in_or_out m_in_or_out;
// 1: takes varargs
// -1: takes varargs only
// 0: does not take varargs.
int m_marked_for_varargs;
};
}
#if defined (OCTAVE_USE_DEPRECATED_FUNCTIONS)
// tree_parameter_list is derived from a template.
#endif
#endif
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