/usr/include/octave-4.0.0/octave/pt-id.h is in liboctave-dev 4.0.0-3ubuntu9.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 1996-2015 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_id_h)
#define octave_pt_id_h 1
#include <iosfwd>
#include <string>
class octave_value;
class octave_value_list;
class octave_function;
class tree_walker;
#include "oct-lvalue.h"
#include "pt-bp.h"
#include "pt-exp.h"
#include "symtab.h"
// Symbols from the symbol table.
class
tree_identifier : public tree_expression
{
friend class tree_index_expression;
public:
tree_identifier (int l = -1, int c = -1)
: tree_expression (l, c) { }
tree_identifier (const symbol_table::symbol_record& s,
int l = -1, int c = -1,
symbol_table::scope_id sc = symbol_table::current_scope ())
: tree_expression (l, c), sym (s, sc) { }
~tree_identifier (void) { }
bool has_magic_end (void) const { return (name () == "end"); }
bool is_identifier (void) const { return true; }
// The name doesn't change with scope, so use sym instead of
// accessing it through sym so that this function may remain const.
std::string name (void) const { return sym.name (); }
bool is_defined (void) { return sym->is_defined (); }
virtual bool is_variable (void) { return sym->is_variable (); }
virtual bool is_black_hole (void) { return false; }
// Try to find a definition for an identifier. Here's how:
//
// * If the identifier is already defined and is a function defined
// in an function file that has been modified since the last time
// we parsed it, parse it again.
//
// * If the identifier is not defined, try to find a builtin
// variable or an already compiled function with the same name.
//
// * If the identifier is still undefined, try looking for an
// function file to parse.
//
// * On systems that support dynamic linking, we prefer .oct files,
// then .mex files, then .m files.
octave_value
do_lookup (const octave_value_list& args = octave_value_list ())
{
return sym->find (args);
}
void mark_global (void) { sym->mark_global (); }
void mark_as_static (void) { sym->init_persistent (); }
void mark_as_formal_parameter (void) { sym->mark_formal (); }
// We really need to know whether this symbol referst to a variable
// or a function, but we may not know that yet.
bool lvalue_ok (void) const { return true; }
octave_value rvalue1 (int nargout = 1);
octave_value_list rvalue (int nargout)
{
return rvalue (nargout, 0);
}
octave_value_list rvalue (int nargout,
const std::list<octave_lvalue> *lvalue_list);
octave_lvalue lvalue (void);
void eval_undefined_error (void);
void static_workspace_error (void)
{
::error ("can not add variable \"%s\" to a static workspace",
name ().c_str ());
}
tree_identifier *dup (symbol_table::scope_id scope,
symbol_table::context_id context) const;
void accept (tree_walker& tw);
symbol_table::symbol_reference symbol (void) const
{
return sym;
}
private:
// The symbol record that this identifier references.
symbol_table::symbol_reference sym;
// No copying!
tree_identifier (const tree_identifier&);
tree_identifier& operator = (const tree_identifier&);
};
class tree_black_hole : public tree_identifier
{
public:
tree_black_hole (int l = -1, int c = -1)
: tree_identifier (l, c) { }
std::string name (void) const { return "~"; }
bool is_variable (void) { return false; }
bool is_black_hole (void) { return true; }
tree_black_hole *dup (void) const
{ return new tree_black_hole; }
octave_lvalue lvalue (void)
{
return octave_lvalue (); // black hole lvalue
}
};
#endif
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