/usr/include/octave-3.8.1/octave/symtab.h is in liboctave-dev 3.8.1-1ubuntu1.
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) 1993-2013 John W. Eaton
Copyright (C) 2009 VZLU Prague
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_symtab_h)
#define octave_symtab_h 1
#include <deque>
#include <list>
#include <map>
#include <set>
#include <string>
#include "glob-match.h"
#include "lo-regexp.h"
class tree_argument_list;
class octave_user_function;
#include "oct-obj.h"
#include "workspace-element.h"
#include "oct-refcount.h"
#include "ov.h"
class
OCTINTERP_API
symbol_table
{
public:
typedef int scope_id;
typedef size_t context_id;
class
scope_id_cache
{
protected:
typedef std::set<scope_id>::iterator set_iterator;
typedef std::set<scope_id>::const_iterator set_const_iterator;
// We start with 2 because we allocate 0 for the global symbols
// and 1 for the top-level workspace.
scope_id_cache (void) : next_available (2), in_use (), free_list () { }
public:
~scope_id_cache (void) { }
static scope_id alloc (void)
{
return instance_ok () ? instance->do_alloc () : -1;
}
static void free (scope_id scope)
{
if (instance_ok ())
return instance->do_free (scope);
}
static std::list<scope_id> scopes (void)
{
return instance_ok () ? instance->do_scopes () : std::list<scope_id> ();
}
static void create_instance (void);
static bool instance_ok (void)
{
bool retval = true;
if (! instance)
create_instance ();
if (! instance)
{
::error ("unable to create scope_id_cache object!");
retval = false;
}
return retval;
}
private:
// No copying!
scope_id_cache (const scope_id_cache&);
scope_id_cache& operator = (const scope_id_cache&);
static scope_id_cache *instance;
static void cleanup_instance (void) { delete instance; instance = 0; }
// The next available scope not in the free list.
scope_id next_available;
// The set of scope IDs that are currently allocated.
std::set<scope_id> in_use;
// The set of scope IDs that are currently available.
std::set<scope_id> free_list;
scope_id do_alloc (void)
{
scope_id retval;
set_iterator p = free_list.begin ();
if (p != free_list.end ())
{
retval = *p;
free_list.erase (p);
}
else
retval = next_available++;
in_use.insert (retval);
return retval;
}
void do_free (scope_id scope)
{
set_iterator p = in_use.find (scope);
if (p != in_use.end ())
{
in_use.erase (p);
free_list.insert (scope);
}
else
error ("free_scope: scope %d not found!", scope);
}
std::list<scope_id> do_scopes (void) const
{
std::list<scope_id> retval;
for (set_const_iterator p = in_use.begin (); p != in_use.end (); p++)
retval.push_back (*p);
retval.sort ();
return retval;
}
};
class fcn_info;
class
symbol_record
{
public:
// generic variable
static const unsigned int local = 1;
// varargin, argn, .nargin., .nargout.
// (FIXME -- is this really used now?)
static const unsigned int automatic = 2;
// formal parameter
static const unsigned int formal = 4;
// not listed or cleared (.nargin., .nargout.)
static const unsigned int hidden = 8;
// inherited from parent scope; not cleared at function exit
static const unsigned int inherited = 16;
// global (redirects to global scope)
static const unsigned int global = 32;
// not cleared at function exit
static const unsigned int persistent = 64;
// this symbol may NOT become a variable.
// (symbol added to a static workspace)
static const unsigned int added_static = 128;
private:
class
symbol_record_rep
{
public:
symbol_record_rep (scope_id s, const std::string& nm,
const octave_value& v, unsigned int sc)
: decl_scope (s), curr_fcn (0), name (nm), value_stack (),
storage_class (sc), finfo (), valid (true), count (1)
{
value_stack.push_back (v);
}
void assign (const octave_value& value,
context_id context = xdefault_context)
{
varref (context) = value;
}
void assign (octave_value::assign_op op,
const std::string& type,
const std::list<octave_value_list>& idx,
const octave_value& value,
context_id context = xdefault_context)
{
varref(context).assign (op, type, idx, value);
}
void assign (octave_value::assign_op op, const octave_value& value,
context_id context = xdefault_context)
{
varref(context).assign (op, value);
}
void do_non_const_unary_op (octave_value::unary_op op,
context_id context = xdefault_context)
{
varref(context).do_non_const_unary_op (op);
}
void do_non_const_unary_op (octave_value::unary_op op,
const std::string& type,
const std::list<octave_value_list>& idx,
context_id context = xdefault_context)
{
varref(context).do_non_const_unary_op (op, type, idx);
}
octave_value& varref (context_id context = xdefault_context)
{
// We duplicate global_varref and persistent_varref here to
// avoid calling deprecated functions.
if (is_global ())
{
symbol_table::global_table_iterator p
= symbol_table::global_table.find (name);
return (p == symbol_table::global_table.end ())
? symbol_table::global_table[name] : p->second;
}
else if (is_persistent ())
{
static octave_value foobar;
symbol_table *inst
= symbol_table::get_instance (symbol_table::current_scope ());
return inst ? inst->do_persistent_varref (name) : foobar;
}
else
{
if (context == xdefault_context)
context = active_context ();
context_id n = value_stack.size ();
while (n++ <= context)
value_stack.push_back (octave_value ());
return value_stack[context];
}
}
octave_value varval (context_id context = xdefault_context) const
{
if (is_global ())
return symbol_table::global_varval (name);
else if (is_persistent ())
return symbol_table::persistent_varval (name);
else
{
if (context == xdefault_context)
context = active_context ();
if (context < value_stack.size ())
return value_stack[context];
else
return octave_value ();
}
}
void push_context (scope_id s)
{
if (! (is_persistent () || is_global ())
&& s == scope ())
value_stack.push_back (octave_value ());
}
// If pop_context returns 0, we are out of values and this element
// of the symbol table should be deleted. This can happen for
// functions like
//
// function foo (n)
// if (n > 0)
// foo (n-1);
// else
// eval ("x = 1");
// endif
// endfunction
//
// Here, X should only exist in the final stack frame.
size_t pop_context (scope_id s)
{
size_t retval = 1;
if (! (is_persistent () || is_global ())
&& s == scope ())
{
value_stack.pop_back ();
retval = value_stack.size ();
}
return retval;
}
void clear (void) { clear (scope ()); }
void clear (scope_id s)
{
if (! (is_hidden () || is_inherited ())
&& s == scope ())
{
if (is_global ())
unmark_global ();
if (is_persistent ())
{
symbol_table::persistent_assign (name, varval ());
unmark_persistent ();
}
assign (octave_value ());
}
}
bool is_defined (context_id context = xdefault_context) const
{
if (context == xdefault_context)
context = active_context ();
return varval (context).is_defined ();
}
bool is_valid (void) const
{
return valid;
}
bool is_variable (context_id context) const
{
if (context == xdefault_context)
context = active_context ();
return (! is_local () || is_defined (context));
}
bool is_local (void) const { return storage_class & local; }
bool is_automatic (void) const { return storage_class & automatic; }
bool is_formal (void) const { return storage_class & formal; }
bool is_hidden (void) const { return storage_class & hidden; }
bool is_inherited (void) const { return storage_class & inherited; }
bool is_global (void) const { return storage_class & global; }
bool is_persistent (void) const { return storage_class & persistent; }
bool is_added_static (void) const {return storage_class & added_static; }
void mark_local (void) { storage_class |= local; }
void mark_automatic (void) { storage_class |= automatic; }
void mark_formal (void) { storage_class |= formal; }
void mark_hidden (void) { storage_class |= hidden; }
void mark_inherited (void) { storage_class |= inherited; }
void mark_global (void)
{
if (is_persistent ())
error ("can't make persistent variable %s global", name.c_str ());
else
storage_class |= global;
}
void mark_persistent (void)
{
if (is_global ())
error ("can't make global variable %s persistent", name.c_str ());
else
storage_class |= persistent;
}
void mark_added_static (void) { storage_class |= added_static; }
void unmark_local (void) { storage_class &= ~local; }
void unmark_automatic (void) { storage_class &= ~automatic; }
void unmark_formal (void) { storage_class &= ~formal; }
void unmark_hidden (void) { storage_class &= ~hidden; }
void unmark_inherited (void) { storage_class &= ~inherited; }
void unmark_global (void) { storage_class &= ~global; }
void unmark_persistent (void) { storage_class &= ~persistent; }
void unmark_added_static (void) { storage_class &= ~added_static; }
void init_persistent (void)
{
if (! is_defined ())
{
mark_persistent ();
assign (symbol_table::persistent_varval (name));
}
// FIXME: this causes trouble with recursive calls.
// else
// error ("unable to declare existing variable persistent");
}
void invalidate (void)
{
valid = false;
}
void erase_persistent (void)
{
unmark_persistent ();
symbol_table::erase_persistent (name);
}
OCTINTERP_API context_id active_context (void) const;
scope_id scope (void) const { return decl_scope; }
void set_curr_fcn (octave_user_function *fcn)
{
curr_fcn = fcn;
}
symbol_record_rep *dup (scope_id new_scope) const
{
return new symbol_record_rep (new_scope, name, varval (),
storage_class);
}
void dump (std::ostream& os, const std::string& prefix) const;
scope_id decl_scope;
octave_user_function* curr_fcn;
std::string name;
std::deque<octave_value> value_stack;
unsigned int storage_class;
fcn_info *finfo;
bool valid;
octave_refcount<size_t> count;
private:
// No copying!
symbol_record_rep (const symbol_record_rep& ov);
symbol_record_rep& operator = (const symbol_record_rep&);
};
public:
symbol_record (scope_id s = xcurrent_scope,
const std::string& nm = std::string (),
const octave_value& v = octave_value (),
unsigned int sc = local)
: rep (new symbol_record_rep (s, nm, v, sc)) { }
symbol_record (const symbol_record& sr)
: rep (sr.rep)
{
rep->count++;
}
symbol_record& operator = (const symbol_record& sr)
{
if (this != &sr)
{
if (--rep->count == 0)
delete rep;
rep = sr.rep;
rep->count++;
}
return *this;
}
~symbol_record (void)
{
if (--rep->count == 0)
delete rep;
}
symbol_record dup (scope_id new_scope) const
{
return symbol_record (rep->dup (new_scope));
}
const std::string& name (void) const { return rep->name; }
void rename (const std::string& new_name) { rep->name = new_name; }
octave_value
find (const octave_value_list& args = octave_value_list ()) const;
void assign (const octave_value& value,
context_id context = xdefault_context)
{
rep->assign (value, context);
}
void assign (octave_value::assign_op op,
const std::string& type,
const std::list<octave_value_list>& idx,
const octave_value& value,
context_id context = xdefault_context)
{
rep->assign (op, type, idx, value, context);
}
void assign (octave_value::assign_op op, const octave_value& value,
context_id context = xdefault_context)
{
rep->assign (op, value, context);
}
void do_non_const_unary_op (octave_value::unary_op op)
{
rep->do_non_const_unary_op (op);
}
void do_non_const_unary_op (octave_value::unary_op op,
const std::string& type,
const std::list<octave_value_list>& idx)
{
rep->do_non_const_unary_op (op, type, idx);
}
// Delete when deprecated varref functions are removed.
octave_value& varref (context_id context = xdefault_context)
{
return rep->varref (context);
}
octave_value varval (context_id context = xdefault_context) const
{
return rep->varval (context);
}
void push_context (scope_id s) { rep->push_context (s); }
size_t pop_context (scope_id s) { return rep->pop_context (s); }
void clear (void) { rep->clear (); }
void clear (scope_id s) { rep->clear (s); }
bool is_defined (context_id context = xdefault_context) const
{
return rep->is_defined (context);
}
bool is_undefined (context_id context = xdefault_context) const
{
return ! rep->is_defined (context);
}
bool is_valid (void) const
{
return rep->is_valid ();
}
bool is_variable (context_id context = xdefault_context) const
{
return rep->is_variable (context);
}
bool is_local (void) const { return rep->is_local (); }
bool is_automatic (void) const { return rep->is_automatic (); }
bool is_formal (void) const { return rep->is_formal (); }
bool is_global (void) const { return rep->is_global (); }
bool is_hidden (void) const { return rep->is_hidden (); }
bool is_inherited (void) const { return rep->is_inherited (); }
bool is_persistent (void) const { return rep->is_persistent (); }
bool is_added_static (void) const { return rep->is_added_static (); }
void mark_local (void) { rep->mark_local (); }
void mark_automatic (void) { rep->mark_automatic (); }
void mark_formal (void) { rep->mark_formal (); }
void mark_hidden (void) { rep->mark_hidden (); }
void mark_inherited (void) { rep->mark_inherited (); }
void mark_global (void) { rep->mark_global (); }
void mark_persistent (void) { rep->mark_persistent (); }
void mark_added_static (void) { rep->mark_added_static (); }
void unmark_local (void) { rep->unmark_local (); }
void unmark_automatic (void) { rep->unmark_automatic (); }
void unmark_formal (void) { rep->unmark_formal (); }
void unmark_hidden (void) { rep->unmark_hidden (); }
void unmark_inherited (void) { rep->unmark_inherited (); }
void unmark_global (void) { rep->unmark_global (); }
void unmark_persistent (void) { rep->unmark_persistent (); }
void unmark_added_static (void) { rep->unmark_added_static (); }
void init_persistent (void) { rep->init_persistent (); }
void erase_persistent (void) { rep->erase_persistent (); }
void invalidate (void) { rep->invalidate (); }
context_id active_context (void) const { return rep->active_context (); }
scope_id scope (void) const { return rep->scope (); }
unsigned int xstorage_class (void) const { return rep->storage_class; }
void set_curr_fcn (octave_user_function *fcn) { rep->set_curr_fcn (fcn); }
void
dump (std::ostream& os, const std::string& prefix = std::string ()) const
{
rep->dump (os, prefix);
}
private:
symbol_record_rep *rep;
symbol_record (symbol_record_rep *new_rep) : rep (new_rep) { }
};
// Always access a symbol from the current scope.
// Useful for scripts, as they may be executed in more than one scope.
class
symbol_reference
{
public:
symbol_reference (void) : scope (-1) { }
symbol_reference (const symbol_record& record,
scope_id curr_scope = symbol_table::current_scope ())
: scope (curr_scope), sym (record)
{ }
symbol_reference (const symbol_reference& ref)
: scope (ref.scope), sym (ref.sym)
{ }
symbol_reference& operator = (const symbol_reference& ref)
{
if (this != &ref)
{
scope = ref.scope;
sym = ref.sym;
}
return *this;
}
bool is_black_hole (void) const { return scope < 0; }
// The name is the same regardless of scope.
const std::string& name (void) const { return sym.name (); }
symbol_record *operator-> (void)
{
update ();
return &sym;
}
symbol_record *operator-> (void) const
{
update ();
return &sym;
}
// can be used to place symbol_reference in maps, we don't overload < as
// it doesn't make any sense for symbol_reference
struct comparator
{
bool operator ()(const symbol_reference& lhs,
const symbol_reference& rhs) const
{
return lhs.name () < rhs.name ();
}
};
private:
void update (void) const
{
scope_id curr_scope = symbol_table::current_scope ();
if (scope != curr_scope || ! sym.is_valid ())
{
scope = curr_scope;
sym = symbol_table::insert (sym.name ());
}
}
mutable scope_id scope;
mutable symbol_record sym;
};
class
fcn_info
{
public:
typedef std::map<std::string, std::string> dispatch_map_type;
typedef std::map<scope_id, octave_value>::const_iterator
scope_val_const_iterator;
typedef std::map<scope_id, octave_value>::iterator scope_val_iterator;
typedef std::map<std::string, octave_value>::const_iterator
str_val_const_iterator;
typedef std::map<std::string, octave_value>::iterator str_val_iterator;
typedef dispatch_map_type::const_iterator dispatch_map_const_iterator;
typedef dispatch_map_type::iterator dispatch_map_iterator;
private:
class
fcn_info_rep
{
public:
fcn_info_rep (const std::string& nm)
: name (nm), subfunctions (), private_functions (),
class_constructors (), class_methods (), dispatch_map (),
cmdline_function (), autoload_function (), function_on_path (),
built_in_function (), count (1) { }
octave_value load_private_function (const std::string& dir_name);
octave_value load_class_constructor (void);
octave_value load_class_method (const std::string& dispatch_type);
octave_value find (const octave_value_list& args, bool local_funcs);
octave_value builtin_find (void);
octave_value find_method (const std::string& dispatch_type);
octave_value find_autoload (void);
octave_value find_user_function (void);
bool is_user_function_defined (void) const
{
return function_on_path.is_defined ();
}
octave_value find_function (const octave_value_list& args,
bool local_funcs)
{
return find (args, local_funcs);
}
void lock_subfunction (scope_id scope)
{
scope_val_iterator p = subfunctions.find (scope);
if (p != subfunctions.end ())
p->second.lock ();
}
void unlock_subfunction (scope_id scope)
{
scope_val_iterator p = subfunctions.find (scope);
if (p != subfunctions.end ())
p->second.unlock ();
}
std::pair<std::string, octave_value>
subfunction_defined_in_scope (scope_id scope) const
{
scope_val_const_iterator p = subfunctions.find (scope);
return p == subfunctions.end ()
? std::pair<std::string, octave_value> ()
: std::pair<std::string, octave_value> (name, p->second);
}
void erase_subfunction (scope_id scope)
{
scope_val_iterator p = subfunctions.find (scope);
if (p != subfunctions.end ())
subfunctions.erase (p);
}
void mark_subfunction_in_scope_as_private (scope_id scope,
const std::string& class_name);
void install_cmdline_function (const octave_value& f)
{
cmdline_function = f;
}
void install_subfunction (const octave_value& f, scope_id scope)
{
subfunctions[scope] = f;
}
void install_user_function (const octave_value& f)
{
function_on_path = f;
}
void install_built_in_function (const octave_value& f)
{
built_in_function = f;
}
template <class T>
void
clear_map (std::map<T, octave_value>& map, bool force = false)
{
typename std::map<T, octave_value>::iterator p = map.begin ();
while (p != map.end ())
{
if (force || ! p->second.islocked ())
map.erase (p++);
else
p++;
}
}
void clear_autoload_function (bool force = false)
{
if (force || ! autoload_function.islocked ())
autoload_function = octave_value ();
}
// We also clear command line functions here, as these are both
// "user defined"
void clear_user_function (bool force = false)
{
if (force || ! function_on_path.islocked ())
function_on_path = octave_value ();
if (force || ! cmdline_function.islocked ())
cmdline_function = octave_value ();
}
void clear_mex_function (void)
{
if (function_on_path.is_mex_function ())
clear_user_function ();
}
void clear (bool force = false)
{
clear_map (subfunctions, force);
clear_map (private_functions, force);
clear_map (class_constructors, force);
clear_map (class_methods, force);
clear_autoload_function (force);
clear_user_function (force);
}
void add_dispatch (const std::string& type, const std::string& fname)
{
dispatch_map[type] = fname;
}
void clear_dispatch (const std::string& type)
{
dispatch_map_iterator p = dispatch_map.find (type);
if (p != dispatch_map.end ())
dispatch_map.erase (p);
}
void print_dispatch (std::ostream& os) const;
std::string help_for_dispatch (void) const;
dispatch_map_type get_dispatch (void) const { return dispatch_map; }
void dump (std::ostream& os, const std::string& prefix) const;
std::string name;
// Scope id to function object.
std::map<scope_id, octave_value> subfunctions;
// Directory name to function object.
std::map<std::string, octave_value> private_functions;
// Class name to function object.
std::map<std::string, octave_value> class_constructors;
// Dispatch type to function object.
std::map<std::string, octave_value> class_methods;
// Legacy dispatch map (dispatch type name to function name).
dispatch_map_type dispatch_map;
octave_value cmdline_function;
octave_value autoload_function;
octave_value function_on_path;
octave_value built_in_function;
octave_refcount<size_t> count;
private:
octave_value xfind (const octave_value_list& args, bool local_funcs);
octave_value x_builtin_find (void);
// No copying!
fcn_info_rep (const fcn_info_rep&);
fcn_info_rep& operator = (const fcn_info_rep&);
};
public:
fcn_info (const std::string& nm = std::string ())
: rep (new fcn_info_rep (nm)) { }
fcn_info (const fcn_info& fi) : rep (fi.rep)
{
rep->count++;
}
fcn_info& operator = (const fcn_info& fi)
{
if (this != &fi)
{
if (--rep->count == 0)
delete rep;
rep = fi.rep;
rep->count++;
}
return *this;
}
~fcn_info (void)
{
if (--rep->count == 0)
delete rep;
}
octave_value find (const octave_value_list& args = octave_value_list (),
bool local_funcs = true)
{
return rep->find (args, local_funcs);
}
octave_value builtin_find (void)
{
return rep->builtin_find ();
}
octave_value find_method (const std::string& dispatch_type) const
{
return rep->find_method (dispatch_type);
}
octave_value find_built_in_function (void) const
{
return rep->built_in_function;
}
octave_value find_cmdline_function (void) const
{
return rep->cmdline_function;
}
octave_value find_autoload (void)
{
return rep->find_autoload ();
}
octave_value find_user_function (void)
{
return rep->find_user_function ();
}
bool is_user_function_defined (void) const
{
return rep->is_user_function_defined ();
}
octave_value find_function (const octave_value_list& args
= octave_value_list (),
bool local_funcs = true)
{
return rep->find_function (args, local_funcs);
}
void lock_subfunction (scope_id scope)
{
rep->lock_subfunction (scope);
}
void unlock_subfunction (scope_id scope)
{
rep->unlock_subfunction (scope);
}
std::pair<std::string, octave_value>
subfunction_defined_in_scope (scope_id scope = xcurrent_scope) const
{
return rep->subfunction_defined_in_scope (scope);
}
void erase_subfunction (scope_id scope)
{
rep->erase_subfunction (scope);
}
void mark_subfunction_in_scope_as_private (scope_id scope,
const std::string& class_name)
{
rep->mark_subfunction_in_scope_as_private (scope, class_name);
}
void install_cmdline_function (const octave_value& f)
{
rep->install_cmdline_function (f);
}
void install_subfunction (const octave_value& f, scope_id scope)
{
rep->install_subfunction (f, scope);
}
void install_user_function (const octave_value& f)
{
rep->install_user_function (f);
}
void install_built_in_function (const octave_value& f)
{
rep->install_built_in_function (f);
}
void clear (bool force = false) { rep->clear (force); }
void clear_user_function (bool force = false)
{
rep->clear_user_function (force);
}
void clear_autoload_function (bool force = false)
{
rep->clear_autoload_function (force);
}
void clear_mex_function (void) { rep->clear_mex_function (); }
void add_dispatch (const std::string& type, const std::string& fname)
{
rep->add_dispatch (type, fname);
}
void clear_dispatch (const std::string& type)
{
rep->clear_dispatch (type);
}
void print_dispatch (std::ostream& os) const
{
rep->print_dispatch (os);
}
std::string help_for_dispatch (void) const
{ return rep->help_for_dispatch (); }
dispatch_map_type get_dispatch (void) const
{
return rep->get_dispatch ();
}
void
dump (std::ostream& os, const std::string& prefix = std::string ()) const
{
rep->dump (os, prefix);
}
private:
fcn_info_rep *rep;
};
static scope_id global_scope (void) { return xglobal_scope; }
static scope_id top_scope (void) { return xtop_scope; }
static scope_id current_scope (void) { return xcurrent_scope; }
static context_id current_context (void) { return xcurrent_context; }
static scope_id alloc_scope (void) { return scope_id_cache::alloc (); }
static void set_scope (scope_id scope)
{
if (scope == xglobal_scope)
error ("can't set scope to global");
else if (scope != xcurrent_scope)
{
all_instances_iterator p = all_instances.find (scope);
if (p == all_instances.end ())
{
symbol_table *inst = new symbol_table (scope);
if (inst)
all_instances[scope] = instance = inst;
}
else
instance = p->second;
xcurrent_scope = scope;
xcurrent_context = 0;
}
}
static void set_scope_and_context (scope_id scope, context_id context)
{
if (scope == xglobal_scope)
error ("can't set scope to global");
else
{
if (scope != xcurrent_scope)
{
all_instances_iterator p = all_instances.find (scope);
if (p == all_instances.end ())
error ("scope not found!");
else
{
instance = p->second;
xcurrent_scope = scope;
xcurrent_context = context;
}
}
else
xcurrent_context = context;
}
}
static void erase_scope (scope_id scope)
{
assert (scope != xglobal_scope);
erase_subfunctions_in_scope (scope);
all_instances_iterator p = all_instances.find (scope);
if (p != all_instances.end ())
{
delete p->second;
all_instances.erase (p);
free_scope (scope);
}
}
static void erase_subfunctions_in_scope (scope_id scope)
{
for (fcn_table_iterator q = fcn_table.begin (); q != fcn_table.end (); q++)
q->second.erase_subfunction (scope);
}
static void
mark_subfunctions_in_scope_as_private (scope_id scope,
const std::string& class_name)
{
for (fcn_table_iterator q = fcn_table.begin (); q != fcn_table.end (); q++)
q->second.mark_subfunction_in_scope_as_private (scope, class_name);
}
static scope_id dup_scope (scope_id scope)
{
scope_id retval = -1;
symbol_table *inst = get_instance (scope);
if (inst)
{
scope_id new_scope = alloc_scope ();
symbol_table *new_symbol_table = new symbol_table (scope);
if (new_symbol_table)
{
all_instances[new_scope] = new_symbol_table;
inst->do_dup_scope (*new_symbol_table);
retval = new_scope;
}
}
return retval;
}
static std::list<scope_id> scopes (void)
{
return scope_id_cache::scopes ();
}
static symbol_record
find_symbol (const std::string& name, scope_id scope = xcurrent_scope)
{
symbol_table *inst = get_instance (scope);
return inst ? inst->do_find_symbol (name) :
symbol_record (scope);
}
static void
inherit (scope_id scope, scope_id donor_scope, context_id donor_context)
{
symbol_table *inst = get_instance (scope);
if (inst)
{
symbol_table *donor_symbol_table = get_instance (donor_scope);
if (donor_symbol_table)
inst->do_inherit (*donor_symbol_table, donor_context);
}
}
static bool at_top_level (void) { return xcurrent_scope == xtop_scope; }
// Find a value corresponding to the given name in the table.
static octave_value
find (const std::string& name,
const octave_value_list& args = octave_value_list (),
bool skip_variables = false,
bool local_funcs = true);
static octave_value builtin_find (const std::string& name);
// Insert a new name in the table.
static symbol_record& insert (const std::string& name,
scope_id scope = xcurrent_scope)
{
static symbol_record foobar;
symbol_table *inst = get_instance (scope);
return inst ? inst->do_insert (name) : foobar;
}
static void rename (const std::string& old_name,
const std::string& new_name,
scope_id scope = xcurrent_scope)
{
symbol_table *inst = get_instance (scope);
if (inst)
inst->do_rename (old_name, new_name);
}
static void assign (const std::string& name,
const octave_value& value = octave_value (),
scope_id scope = xcurrent_scope,
context_id context = xdefault_context,
bool force_add = false)
{
static octave_value foobar;
symbol_table *inst = get_instance (scope);
if (inst)
inst->do_assign (name, value, context, force_add);
}
// Use assign (name, value, scope, context, force_add) instead.
static octave_value&
varref (const std::string& name, scope_id scope = xcurrent_scope,
context_id context = xdefault_context, bool force_add = false)
GCC_ATTR_DEPRECATED
{
static octave_value foobar;
symbol_table *inst = get_instance (scope);
return inst ? inst->do_varref (name, context, force_add) : foobar;
}
// Convenience function to simplify
// octave_user_function::bind_automatic_vars
static void force_assign (const std::string& name,
const octave_value& value = octave_value (),
scope_id scope = xcurrent_scope,
context_id context = xdefault_context)
{
assign (name, value, scope, context, true);
}
// Use force_assign (name, value, scope, context) instead.
static octave_value&
force_varref (const std::string& name, scope_id scope = xcurrent_scope,
context_id context = xdefault_context) GCC_ATTR_DEPRECATED
{
static octave_value foobar;
symbol_table *inst = get_instance (scope);
return inst ? inst->do_varref (name, context, true) : foobar;
}
static octave_value varval (const std::string& name,
scope_id scope = xcurrent_scope,
context_id context = xdefault_context)
{
symbol_table *inst = get_instance (scope);
return inst ? inst->do_varval (name, context) : octave_value ();
}
static void
global_assign (const std::string& name,
const octave_value& value = octave_value ())
{
global_table_iterator p = global_table.find (name);
if (p == global_table.end ())
global_table[name] = value;
else
p->second = value;
}
// Use global_assign (name, value) instead.
static octave_value&
global_varref (const std::string& name) GCC_ATTR_DEPRECATED
{
global_table_iterator p = global_table.find (name);
return (p == global_table.end ()) ? global_table[name] : p->second;
}
static octave_value
global_varval (const std::string& name)
{
global_table_const_iterator p = global_table.find (name);
return (p != global_table.end ()) ? p->second : octave_value ();
}
static void
top_level_assign (const std::string& name,
const octave_value& value = octave_value ())
{
assign (name, value, top_scope (), 0);
}
// Use top_level_assign (name, value) instead.
static octave_value&
top_level_varref (const std::string& name) GCC_ATTR_DEPRECATED
{
static octave_value foobar;
symbol_table *inst = get_instance (top_scope ());
return inst ? inst->do_varref (name, 0, true) : foobar;
}
static octave_value
top_level_varval (const std::string& name)
{
return varval (name, top_scope (), 0);
}
static void
persistent_assign (const std::string& name,
const octave_value& value = octave_value ())
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_persistent_assign (name, value);
}
// Use persistent_assign (name, value) instead.
static octave_value& persistent_varref (const std::string& name)
GCC_ATTR_DEPRECATED
{
static octave_value foobar;
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_persistent_varref (name) : foobar;
}
static octave_value persistent_varval (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_persistent_varval (name) : octave_value ();
}
static void erase_persistent (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_erase_persistent (name);
}
static bool is_variable (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_is_variable (name) : false;
}
static bool
is_built_in_function_name (const std::string& name)
{
octave_value val = find_built_in_function (name);
return val.is_defined ();
}
static octave_value
find_method (const std::string& name, const std::string& dispatch_type)
{
fcn_table_const_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
return p->second.find_method (dispatch_type);
else
{
fcn_info finfo (name);
octave_value fcn = finfo.find_method (dispatch_type);
if (fcn.is_defined ())
fcn_table[name] = finfo;
return fcn;
}
}
static octave_value
find_built_in_function (const std::string& name)
{
fcn_table_const_iterator p = fcn_table.find (name);
return (p != fcn_table.end ())
? p->second.find_built_in_function () : octave_value ();
}
static octave_value
find_autoload (const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
return (p != fcn_table.end ())
? p->second.find_autoload () : octave_value ();
}
static octave_value
find_function (const std::string& name,
const octave_value_list& args = octave_value_list (),
bool local_funcs = true);
static octave_value find_user_function (const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
return (p != fcn_table.end ())
? p->second.find_user_function () : octave_value ();
}
static void install_cmdline_function (const std::string& name,
const octave_value& fcn)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.install_cmdline_function (fcn);
}
else
{
fcn_info finfo (name);
finfo.install_cmdline_function (fcn);
fcn_table[name] = finfo;
}
}
// Install subfunction FCN named NAME. SCOPE is the scope of the
// primary function corresponding to this subfunction.
static void install_subfunction (const std::string& name,
const octave_value& fcn,
scope_id scope)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.install_subfunction (fcn, scope);
}
else
{
fcn_info finfo (name);
finfo.install_subfunction (fcn, scope);
fcn_table[name] = finfo;
}
}
static void install_nestfunction (const std::string& name,
const octave_value& fcn,
scope_id parent_scope);
static void update_nest (scope_id scope)
{
symbol_table *inst = get_instance (scope);
if (inst)
inst->do_update_nest ();
}
static void install_user_function (const std::string& name,
const octave_value& fcn)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.install_user_function (fcn);
}
else
{
fcn_info finfo (name);
finfo.install_user_function (fcn);
fcn_table[name] = finfo;
}
}
static void install_built_in_function (const std::string& name,
const octave_value& fcn)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.install_built_in_function (fcn);
}
else
{
fcn_info finfo (name);
finfo.install_built_in_function (fcn);
fcn_table[name] = finfo;
}
}
static void clear (const std::string& name)
{
clear_variable (name);
}
static void clear_all (bool force = false)
{
clear_variables ();
clear_global_pattern ("*");
clear_functions (force);
}
static void clear_variables (scope_id scope)
{
symbol_table *inst = get_instance (scope);
if (inst)
inst->do_clear_variables ();
}
// This is split for unwind_protect.
static void clear_variables (void)
{
clear_variables (xcurrent_scope);
}
static void clear_objects (scope_id scope = xcurrent_scope)
{
symbol_table *inst = get_instance (scope);
if (inst)
inst->do_clear_objects ();
}
static void clear_functions (bool force = false)
{
for (fcn_table_iterator p = fcn_table.begin (); p != fcn_table.end (); p++)
p->second.clear (force);
}
static void clear_function (const std::string& name)
{
clear_user_function (name);
}
static void clear_global (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_clear_global (name);
}
static void clear_variable (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_clear_variable (name);
}
static void clear_symbol (const std::string& name)
{
// FIXME: are we supposed to do both here?
clear_variable (name);
clear_function (name);
}
static void clear_function_pattern (const std::string& pat)
{
glob_match pattern (pat);
for (fcn_table_iterator p = fcn_table.begin (); p != fcn_table.end (); p++)
{
if (pattern.match (p->first))
p->second.clear_user_function ();
}
}
static void clear_global_pattern (const std::string& pat)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_clear_global_pattern (pat);
}
static void clear_variable_pattern (const std::string& pat)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_clear_variable_pattern (pat);
}
static void clear_variable_regexp (const std::string& pat)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_clear_variable_regexp (pat);
}
static void clear_symbol_pattern (const std::string& pat)
{
// FIXME: are we supposed to do both here?
clear_variable_pattern (pat);
clear_function_pattern (pat);
}
static void clear_user_function (const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.clear_user_function ();
}
// FIXME: is this necessary, or even useful?
// else
// error ("clear: no such function '%s'", name.c_str ());
}
// This clears oct and mex files, incl. autoloads.
static void clear_dld_function (const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.clear_autoload_function ();
finfo.clear_user_function ();
}
}
static void clear_mex_functions (void)
{
for (fcn_table_iterator p = fcn_table.begin (); p != fcn_table.end (); p++)
{
fcn_info& finfo = p->second;
finfo.clear_mex_function ();
}
}
static bool set_class_relationship (const std::string& sup_class,
const std::string& inf_class);
static bool is_superiorto (const std::string& a, const std::string& b);
static void alias_built_in_function (const std::string& alias,
const std::string& name)
{
octave_value fcn = find_built_in_function (name);
if (fcn.is_defined ())
{
fcn_info finfo (alias);
finfo.install_built_in_function (fcn);
fcn_table[alias] = finfo;
}
else
panic ("alias: '%s' is undefined", name.c_str ());
}
static void add_dispatch (const std::string& name, const std::string& type,
const std::string& fname)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.add_dispatch (type, fname);
}
else
{
fcn_info finfo (name);
finfo.add_dispatch (type, fname);
fcn_table[name] = finfo;
}
}
static void clear_dispatch (const std::string& name, const std::string& type)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.clear_dispatch (type);
}
}
static void print_dispatch (std::ostream& os, const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
finfo.print_dispatch (os);
}
}
static fcn_info::dispatch_map_type get_dispatch (const std::string& name)
{
fcn_info::dispatch_map_type retval;
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
retval = finfo.get_dispatch ();
}
return retval;
}
static std::string help_for_dispatch (const std::string& name)
{
std::string retval;
fcn_table_iterator p = fcn_table.find (name);
if (p != fcn_table.end ())
{
fcn_info& finfo = p->second;
retval = finfo.help_for_dispatch ();
}
return retval;
}
static void push_context (void)
{
if (xcurrent_scope == xglobal_scope || xcurrent_scope == xtop_scope)
error ("invalid call to xymtab::push_context");
else
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_push_context ();
}
}
static void pop_context (void)
{
if (xcurrent_scope == xglobal_scope || xcurrent_scope == xtop_scope)
error ("invalid call to xymtab::pop_context");
else
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_pop_context ();
}
}
// For unwind_protect.
static void pop_context (void *) { pop_context (); }
static void mark_automatic (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_mark_automatic (name);
}
static void mark_hidden (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_mark_hidden (name);
}
static void mark_global (const std::string& name)
{
symbol_table *inst = get_instance (xcurrent_scope);
if (inst)
inst->do_mark_global (name);
}
// exclude: Storage classes to exclude, you can OR them together
static std::list<symbol_record>
all_variables (scope_id scope = xcurrent_scope,
context_id context = xdefault_context,
bool defined_only = true,
unsigned int exclude = symbol_record::hidden)
{
symbol_table *inst = get_instance (scope);
return inst
? inst->do_all_variables (context, defined_only, exclude)
: std::list<symbol_record> ();
}
static std::list<symbol_record> glob (const std::string& pattern)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_glob (pattern) : std::list<symbol_record> ();
}
static std::list<symbol_record> regexp (const std::string& pattern)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_regexp (pattern) : std::list<symbol_record> ();
}
static std::list<symbol_record> glob_variables (const std::string& pattern)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_glob (pattern, true) : std::list<symbol_record> ();
}
static std::list<symbol_record> regexp_variables (const std::string& pattern)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_regexp (pattern, true) : std::list<symbol_record> ();
}
static std::list<symbol_record>
glob_global_variables (const std::string& pattern)
{
std::list<symbol_record> retval;
glob_match pat (pattern);
for (global_table_const_iterator p = global_table.begin ();
p != global_table.end (); p++)
{
// We generate a list of symbol_record objects so that
// the results from glob_variables and glob_global_variables
// may be handled the same way.
if (pat.match (p->first))
retval.push_back (symbol_record (xglobal_scope,
p->first, p->second,
symbol_record::global));
}
return retval;
}
static std::list<symbol_record>
regexp_global_variables (const std::string& pattern)
{
std::list<symbol_record> retval;
::regexp pat (pattern);
for (global_table_const_iterator p = global_table.begin ();
p != global_table.end (); p++)
{
// We generate a list of symbol_record objects so that
// the results from regexp_variables and regexp_global_variables
// may be handled the same way.
if (pat.is_match (p->first))
retval.push_back (symbol_record (xglobal_scope,
p->first, p->second,
symbol_record::global));
}
return retval;
}
static std::list<symbol_record> glob_variables (const string_vector& patterns)
{
std::list<symbol_record> retval;
size_t len = patterns.length ();
for (size_t i = 0; i < len; i++)
{
std::list<symbol_record> tmp = glob_variables (patterns[i]);
retval.insert (retval.begin (), tmp.begin (), tmp.end ());
}
return retval;
}
static std::list<symbol_record> regexp_variables
(const string_vector& patterns)
{
std::list<symbol_record> retval;
size_t len = patterns.length ();
for (size_t i = 0; i < len; i++)
{
std::list<symbol_record> tmp = regexp_variables (patterns[i]);
retval.insert (retval.begin (), tmp.begin (), tmp.end ());
}
return retval;
}
static std::list<std::string> user_function_names (void)
{
std::list<std::string> retval;
for (fcn_table_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
{
if (p->second.is_user_function_defined ())
retval.push_back (p->first);
}
if (! retval.empty ())
retval.sort ();
return retval;
}
static std::list<std::string> global_variable_names (void)
{
std::list<std::string> retval;
for (global_table_const_iterator p = global_table.begin ();
p != global_table.end (); p++)
retval.push_back (p->first);
retval.sort ();
return retval;
}
static std::list<std::string> top_level_variable_names (void)
{
symbol_table *inst = get_instance (xtop_scope);
return inst ? inst->do_variable_names () : std::list<std::string> ();
}
static std::list<std::string> variable_names (void)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_variable_names () : std::list<std::string> ();
}
static std::list<std::string> built_in_function_names (void)
{
std::list<std::string> retval;
for (fcn_table_const_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
{
octave_value fcn = p->second.find_built_in_function ();
if (fcn.is_defined ())
retval.push_back (p->first);
}
if (! retval.empty ())
retval.sort ();
return retval;
}
static std::list<std::string> cmdline_function_names (void)
{
std::list<std::string> retval;
for (fcn_table_const_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
{
octave_value fcn = p->second.find_cmdline_function ();
if (fcn.is_defined ())
retval.push_back (p->first);
}
if (! retval.empty ())
retval.sort ();
return retval;
}
static bool is_local_variable (const std::string& name)
{
if (xcurrent_scope == xglobal_scope)
return false;
else
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_is_local_variable (name) : false;
}
}
static bool is_global (const std::string& name)
{
if (xcurrent_scope == xglobal_scope)
return true;
else
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst ? inst->do_is_global (name) : false;
}
}
static std::list<workspace_element> workspace_info (void)
{
symbol_table *inst = get_instance (xcurrent_scope);
return inst
? inst->do_workspace_info () : std::list<workspace_element> ();
}
static void dump (std::ostream& os, scope_id scope = xcurrent_scope);
static void dump_global (std::ostream& os);
static void dump_functions (std::ostream& os);
static void cache_name (scope_id scope, const std::string& name)
{
symbol_table *inst = get_instance (scope, false);
if (inst)
inst->do_cache_name (name);
}
static void lock_subfunctions (scope_id scope = xcurrent_scope)
{
for (fcn_table_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
p->second.lock_subfunction (scope);
}
static void unlock_subfunctions (scope_id scope = xcurrent_scope)
{
for (fcn_table_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
p->second.unlock_subfunction (scope);
}
static std::map<std::string, octave_value>
subfunctions_defined_in_scope (scope_id scope = xcurrent_scope)
{
std::map<std::string, octave_value> retval;
for (fcn_table_const_iterator p = fcn_table.begin ();
p != fcn_table.end (); p++)
{
std::pair<std::string, octave_value> tmp
= p->second.subfunction_defined_in_scope (scope);
std::string nm = tmp.first;
if (! nm.empty ())
retval[nm] = tmp.second;
}
return retval;
}
static void free_scope (scope_id scope)
{
if (scope == xglobal_scope || scope == xtop_scope)
error ("can't free global or top-level scopes!");
else
symbol_table::scope_id_cache::free (scope);
}
static void stash_dir_name_for_subfunctions (scope_id scope,
const std::string& dir_name);
static void add_to_parent_map (const std::string& classname,
const std::list<std::string>& parent_list)
{
parent_map[classname] = parent_list;
}
static std::list<std::string>
parent_classes (const std::string& dispatch_type)
{
std::list<std::string> retval;
const_parent_map_iterator it = parent_map.find (dispatch_type);
if (it != parent_map.end ())
retval = it->second;
for (std::list<std::string>::const_iterator lit = retval.begin ();
lit != retval.end (); lit++)
{
// Search for parents of parents and append them to the list.
// FIXME: should we worry about a circular inheritance graph?
std::list<std::string> parents = parent_classes (*lit);
if (! parents.empty ())
retval.insert (retval.end (), parents.begin (), parents.end ());
}
return retval;
}
static octave_user_function *get_curr_fcn (scope_id scope = xcurrent_scope)
{
symbol_table *inst = get_instance (scope);
return inst->curr_fcn;
}
static void set_curr_fcn (octave_user_function *curr_fcn,
scope_id scope = xcurrent_scope)
{
assert (scope != xtop_scope && scope != xglobal_scope);
symbol_table *inst = get_instance (scope);
// FIXME: normally, functions should not usurp each other's scope.
// If for any incredible reason this is needed, call
// set_user_function (0, scope) first. This may cause problems with
// nested functions, as the curr_fcn of symbol_records must be updated.
assert (inst->curr_fcn == 0 || curr_fcn == 0);
inst->curr_fcn = curr_fcn;
}
static void cleanup (void);
private:
// No copying!
symbol_table (const symbol_table&);
symbol_table& operator = (const symbol_table&);
typedef std::map<std::string, symbol_record>::const_iterator
table_const_iterator;
typedef std::map<std::string, symbol_record>::iterator
table_iterator;
typedef std::map<std::string, octave_value>::const_iterator
global_table_const_iterator;
typedef std::map<std::string, octave_value>::iterator
global_table_iterator;
typedef std::map<std::string, octave_value>::const_iterator
persistent_table_const_iterator;
typedef std::map<std::string, octave_value>::iterator
persistent_table_iterator;
typedef std::map<scope_id, symbol_table*>::const_iterator
all_instances_const_iterator;
typedef std::map<scope_id, symbol_table*>::iterator
all_instances_iterator;
typedef std::map<std::string, fcn_info>::const_iterator
fcn_table_const_iterator;
typedef std::map<std::string, fcn_info>::iterator
fcn_table_iterator;
// The scope of this symbol table.
scope_id my_scope;
// Name for this table (usually the file name of the function
// corresponding to the scope);
std::string table_name;
// Map from symbol names to symbol info.
std::map<std::string, symbol_record> table;
// Child nested functions.
std::vector<symbol_table*> nest_children;
// Parent nested function (may be null).
symbol_table *nest_parent;
// The associated user code (may be null).
octave_user_function *curr_fcn;
// If true then no variables can be added.
bool static_workspace;
// Map from names of global variables to values.
static std::map<std::string, octave_value> global_table;
// Map from names of persistent variables to values.
std::map<std::string, octave_value> persistent_table;
// Pointer to symbol table for current scope (variables only).
static symbol_table *instance;
// Map from scope id to symbol table instances.
static std::map<scope_id, symbol_table*> all_instances;
// Map from function names to function info (subfunctions, private
// functions, class constructors, class methods, etc.)
static std::map<std::string, fcn_info> fcn_table;
// Mape from class names to set of classes that have lower
// precedence.
static std::map<std::string, std::set<std::string> > class_precedence_table;
typedef std::map<std::string, std::set<std::string> >::const_iterator
class_precedence_table_const_iterator;
typedef std::map<std::string, std::set<std::string> >::iterator
class_precedence_table_iterator;
// Map from class names to parent class names.
static std::map<std::string, std::list<std::string> > parent_map;
typedef std::map<std::string, std::list<std::string> >::const_iterator
const_parent_map_iterator;
typedef std::map<std::string, std::list<std::string> >::iterator
parent_map_iterator;
static const scope_id xglobal_scope;
static const scope_id xtop_scope;
static scope_id xcurrent_scope;
static context_id xcurrent_context;
static const context_id xdefault_context = static_cast<context_id> (-1);
symbol_table (scope_id scope)
: my_scope (scope), table_name (), table (), nest_children (),
nest_parent (0), curr_fcn (0), static_workspace (false),
persistent_table () { }
~symbol_table (void) { }
static symbol_table *get_instance (scope_id scope, bool create = true)
{
symbol_table *retval = 0;
bool ok = true;
if (scope != xglobal_scope)
{
if (scope == xcurrent_scope)
{
if (! instance && create)
{
symbol_table *inst = new symbol_table (scope);
if (inst)
{
all_instances[scope] = instance = inst;
if (scope == xtop_scope)
instance->do_cache_name ("top-level");
}
}
if (! instance)
ok = false;
retval = instance;
}
else
{
all_instances_iterator p = all_instances.find (scope);
if (p == all_instances.end ())
{
if (create)
{
retval = new symbol_table (scope);
if (retval)
all_instances[scope] = retval;
else
ok = false;
}
else
ok = false;
}
else
retval = p->second;
}
}
if (! ok)
error ("unable to %s symbol_table object for scope %d!",
create ? "create" : "find", scope);
return retval;
}
void add_nest_child (symbol_table& st)
{
assert (!st.nest_parent);
nest_children.push_back (&st);
st.nest_parent = this;
}
void insert_symbol_record (const symbol_record& sr)
{
table[sr.name ()] = sr;
}
void
do_dup_scope (symbol_table& new_symbol_table) const
{
for (table_const_iterator p = table.begin (); p != table.end (); p++)
new_symbol_table.insert_symbol_record (p->second.dup (new_symbol_table
.my_scope));
}
symbol_record do_find_symbol (const std::string& name)
{
table_iterator p = table.find (name);
if (p == table.end ())
return do_insert (name);
else
return p->second;
}
void do_inherit (symbol_table& donor_table, context_id donor_context)
{
for (table_iterator p = table.begin (); p != table.end (); p++)
{
symbol_record& sr = p->second;
if (! (sr.is_automatic () || sr.is_formal ()))
{
std::string nm = sr.name ();
if (nm != "__retval__")
{
octave_value val = donor_table.do_varval (nm, donor_context);
if (val.is_defined ())
{
sr.assign (val, 0);
sr.mark_inherited ();
}
}
}
}
}
static fcn_info *get_fcn_info (const std::string& name)
{
fcn_table_iterator p = fcn_table.find (name);
return p != fcn_table.end () ? &p->second : 0;
}
octave_value
do_find (const std::string& name, const octave_value_list& args,
bool skip_variables, bool local_funcs);
octave_value do_builtin_find (const std::string& name);
symbol_record& do_insert (const std::string& name, bool force_add = false)
{
table_iterator p = table.find (name);
if (p == table.end ())
{
symbol_record ret (my_scope, name);
if (nest_parent && nest_parent->look_nonlocal (name, ret))
return table[name] = ret;
else
{
if (static_workspace && ! force_add)
ret.mark_added_static ();
return table[name] = ret;
}
}
else
return p->second;
}
void do_rename (const std::string& old_name, const std::string& new_name)
{
table_iterator p = table.find (old_name);
if (p != table.end ())
{
symbol_record sr = p->second;
sr.rename (new_name);
table.erase (p);
table[new_name] = sr;
}
}
void do_assign (const std::string& name, const octave_value& value,
context_id context, bool force_add)
{
table_iterator p = table.find (name);
if (p == table.end ())
{
symbol_record& sr = do_insert (name, force_add);
sr.assign (value, context);
}
else
p->second.assign (value, context);
}
// Use do_assign (name, value, context, force_add) instead.
// Delete when deprecated varref functions are removed.
octave_value& do_varref (const std::string& name, context_id context,
bool force_add)
{
table_iterator p = table.find (name);
if (p == table.end ())
{
symbol_record& sr = do_insert (name, force_add);
return sr.varref (context);
}
else
return p->second.varref (context);
}
octave_value do_varval (const std::string& name, context_id context) const
{
table_const_iterator p = table.find (name);
return (p != table.end ()) ? p->second.varval (context) : octave_value ();
}
void do_persistent_assign (const std::string& name, const octave_value& value)
{
persistent_table_iterator p = persistent_table.find (name);
if (p == persistent_table.end ())
persistent_table[name] = value;
else
p->second = value;
}
// Use do_persistent_assign (name, value) instead.
// Delete when deprecated varref functions are removed.
octave_value& do_persistent_varref (const std::string& name)
{
persistent_table_iterator p = persistent_table.find (name);
return (p == persistent_table.end ())
? persistent_table[name] : p->second;
}
octave_value do_persistent_varval (const std::string& name)
{
persistent_table_const_iterator p = persistent_table.find (name);
return (p != persistent_table.end ()) ? p->second : octave_value ();
}
void do_erase_persistent (const std::string& name)
{
persistent_table_iterator p = persistent_table.find (name);
if (p != persistent_table.end ())
persistent_table.erase (p);
}
bool do_is_variable (const std::string& name) const
{
bool retval = false;
table_const_iterator p = table.find (name);
if (p != table.end ())
{
const symbol_record& sr = p->second;
retval = sr.is_variable ();
}
return retval;
}
void do_push_context (void)
{
for (table_iterator p = table.begin (); p != table.end (); p++)
p->second.push_context (my_scope);
}
void do_pop_context (void)
{
table_iterator p = table.begin ();
while (p != table.end ())
{
if (p->second.pop_context (my_scope) == 0)
table.erase (p++);
else
p++;
}
}
void do_clear_variables (void)
{
for (table_iterator p = table.begin (); p != table.end (); p++)
p->second.clear (my_scope);
}
void do_clear_objects (void)
{
for (table_iterator p = table.begin (); p != table.end (); p++)
{
symbol_record& sr = p->second;
octave_value val = sr.varval ();
if (val.is_object ())
p->second.clear (my_scope);
}
}
void do_clear_global (const std::string& name)
{
table_iterator p = table.find (name);
if (p != table.end ())
{
symbol_record& sr = p->second;
if (sr.is_global ())
sr.unmark_global ();
}
global_table_iterator q = global_table.find (name);
if (q != global_table.end ())
global_table.erase (q);
}
void do_clear_variable (const std::string& name)
{
table_iterator p = table.find (name);
if (p != table.end ())
p->second.clear (my_scope);
}
void do_clear_global_pattern (const std::string& pat)
{
glob_match pattern (pat);
for (table_iterator p = table.begin (); p != table.end (); p++)
{
symbol_record& sr = p->second;
if (sr.is_global () && pattern.match (sr.name ()))
sr.unmark_global ();
}
global_table_iterator q = global_table.begin ();
while (q != global_table.end ())
{
if (pattern.match (q->first))
global_table.erase (q++);
else
q++;
}
}
void do_clear_variable_pattern (const std::string& pat)
{
glob_match pattern (pat);
for (table_iterator p = table.begin (); p != table.end (); p++)
{
symbol_record& sr = p->second;
if (sr.is_defined () || sr.is_global ())
{
if (pattern.match (sr.name ()))
sr.clear (my_scope);
}
}
}
void do_clear_variable_regexp (const std::string& pat)
{
::regexp pattern (pat);
for (table_iterator p = table.begin (); p != table.end (); p++)
{
symbol_record& sr = p->second;
if (sr.is_defined () || sr.is_global ())
{
if (pattern.is_match (sr.name ()))
sr.clear (my_scope);
}
}
}
void do_mark_automatic (const std::string& name)
{
do_insert (name).mark_automatic ();
}
void do_mark_hidden (const std::string& name)
{
do_insert (name).mark_hidden ();
}
void do_mark_global (const std::string& name)
{
do_insert (name).mark_global ();
}
std::list<symbol_record>
do_all_variables (context_id context, bool defined_only,
unsigned int exclude) const
{
std::list<symbol_record> retval;
for (table_const_iterator p = table.begin (); p != table.end (); p++)
{
const symbol_record& sr = p->second;
if ((defined_only && ! sr.is_defined (context))
|| (sr.xstorage_class () & exclude))
continue;
retval.push_back (sr);
}
return retval;
}
std::list<symbol_record> do_glob (const std::string& pattern,
bool vars_only = false) const
{
std::list<symbol_record> retval;
glob_match pat (pattern);
for (table_const_iterator p = table.begin (); p != table.end (); p++)
{
if (pat.match (p->first))
{
const symbol_record& sr = p->second;
if (vars_only && ! sr.is_variable ())
continue;
retval.push_back (sr);
}
}
return retval;
}
std::list<symbol_record> do_regexp (const std::string& pattern,
bool vars_only = false) const
{
std::list<symbol_record> retval;
::regexp pat (pattern);
for (table_const_iterator p = table.begin (); p != table.end (); p++)
{
if (pat.is_match (p->first))
{
const symbol_record& sr = p->second;
if (vars_only && ! sr.is_variable ())
continue;
retval.push_back (sr);
}
}
return retval;
}
std::list<std::string> do_variable_names (void)
{
std::list<std::string> retval;
for (table_const_iterator p = table.begin (); p != table.end (); p++)
{
if (p->second.is_variable ())
retval.push_back (p->first);
}
retval.sort ();
return retval;
}
bool do_is_local_variable (const std::string& name) const
{
table_const_iterator p = table.find (name);
return (p != table.end ()
&& ! p->second.is_global ()
&& p->second.is_defined ());
}
bool do_is_global (const std::string& name) const
{
table_const_iterator p = table.find (name);
return p != table.end () && p->second.is_global ();
}
std::list<workspace_element> do_workspace_info (void) const;
void do_dump (std::ostream& os);
void do_cache_name (const std::string& name) { table_name = name; }
void do_update_nest (void);
bool look_nonlocal (const std::string& name, symbol_record& result)
{
table_iterator p = table.find (name);
if (p == table.end ())
{
if (nest_parent)
return nest_parent->look_nonlocal (name, result);
}
else if (! p->second.is_automatic ())
{
result = p->second;
return true;
}
return false;
}
};
extern bool out_of_date_check (octave_value& function,
const std::string& dispatch_type = std::string (),
bool check_relative = true);
extern OCTINTERP_API std::string
get_dispatch_type (const octave_value_list& args);
extern OCTINTERP_API std::string
get_dispatch_type (const octave_value_list& args, builtin_type_t& builtin_type);
#endif
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