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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2007-2021 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/>.
//
////////////////////////////////////////////////////////////////////////
//! @file op-class.cc
//! Unary and binary operators for classdef and old style classes.
#if defined (HAVE_CONFIG_H)
# include "config.h"
#endif
#include "oct-time.h"
#include "errwarn.h"
#include "interpreter-private.h"
#include "load-path.h"
#include "ovl.h"
#include "ov.h"
#include "ov-class.h"
#include "ov-typeinfo.h"
#include "ops.h"
#include "symtab.h"
#include "parse.h"
//! Default unary class operator.
//!
//! @param a operand
//! @param opname operator name
static octave_value
oct_unop_default (const octave_value& a, const std::string& opname)
{
std::string class_name = a.class_name ();
octave_value meth
= octave::__get_symbol_table__ ("oct_unop_" + opname)
.find_method (opname, class_name);
if (meth.is_defined ())
{
// Call overloaded unary class operator.
octave_value_list tmp = octave::feval (meth.function_value (),
ovl (a), 1);
// Return first element if present.
if (tmp.length () > 0)
return tmp(0);
return octave_value ();
}
// Matlab compatibility: If (conjugate) transpose is not overloaded and
// the number of dimensions is maximal two, just transpose the array of
// that class.
if ((opname == "transpose") || (opname == "ctranspose"))
{
if (a.ndims () > 2)
error ("%s not defined for N-D objects of %s class", opname.c_str (),
class_name.c_str ());
if (a.is_classdef_object ())
{
// FIXME: Default transposition for classdef arrays.
error ("%s method not defined for %s class", opname.c_str (),
class_name.c_str ());
}
else
{
const octave_class& v
= dynamic_cast<const octave_class&> (a.get_rep ());
return octave_value (v.map_value ().transpose (),
v.class_name (),
v.parent_class_name_list ());
}
}
else
error ("%s method not defined for %s class", opname.c_str (),
class_name.c_str ());
}
//! Helper macro to define unary class operators.
#define DEF_CLASS_UNOP(opname) \
static octave_value \
oct_unop_ ## opname (const octave_value& a) \
{ \
return oct_unop_default (a, #opname); \
}
DEF_CLASS_UNOP (not) // !a or ~a
DEF_CLASS_UNOP (uplus) // +a
DEF_CLASS_UNOP (uminus) // -a
DEF_CLASS_UNOP (transpose) // a.'
DEF_CLASS_UNOP (ctranspose) // a'
#undef DEF_CLASS_UNOP
//! Default binary class operator.
//!
//! @param a1 first operand
//! @param a2 second operand
//! @param opname operator name
//!
//! The operator precedence is as follows:
//!
//! 1. If exactly one of the operands is a user defined class object, then
//! the class method of that operand is invoked.
//!
//! 2. If both operands are user defined class objects, then
//! 2.1 The superior class method is invoked.
//! 2.2 The leftmost class method is invoked if both classes are the same
//! or their precedence is not defined by superiorto/inferiorto.
static octave_value
oct_binop_default (const octave_value& a1, const octave_value& a2,
const std::string& opname)
{
octave::symbol_table& symtab
= octave::__get_symbol_table__ ("oct_binop_" + opname);
// Dispatch to first (leftmost) operand by default.
std::string dispatch_type = a1.class_name ();
// Determine, if second operand takes precedence (see rules above).
if (! a1.isobject ()
|| (a1.isobject () && a2.isobject ()
&& symtab.is_superiorto (a2.class_name (), dispatch_type)))
dispatch_type = a2.class_name ();
octave_value meth = symtab.find_method (opname, dispatch_type);
if (meth.is_undefined ())
error ("%s method not defined for %s class", opname.c_str (),
dispatch_type.c_str ());
octave_value_list tmp = octave::feval (meth.function_value (),
ovl (a1, a2), 1);
if (tmp.length () > 0)
return tmp(0);
return octave_value ();
}
//! Helper macro to define binary class operators.
#define DEF_CLASS_BINOP(opname) \
static octave_value \
oct_binop_ ## opname (const octave_value& a1, const octave_value& a2) \
{ \
return oct_binop_default (a1, a2, #opname); \
}
DEF_CLASS_BINOP (plus) // a1 + a2
DEF_CLASS_BINOP (minus) // a1 - a2
DEF_CLASS_BINOP (mtimes) // a1 * a2
DEF_CLASS_BINOP (mrdivide) // a1 / a2
DEF_CLASS_BINOP (mpower) // a1 ^ a2
DEF_CLASS_BINOP (mldivide) // a1 \ a2
DEF_CLASS_BINOP (lt) // a1 < a2
DEF_CLASS_BINOP (le) // a1 <= a2
DEF_CLASS_BINOP (eq) // a1 <= a2
DEF_CLASS_BINOP (ge) // a1 >= a2
DEF_CLASS_BINOP (gt) // a1 > a2
DEF_CLASS_BINOP (ne) // a1 ~= a2 or a1 != a2
DEF_CLASS_BINOP (times) // a1 .* a2
DEF_CLASS_BINOP (rdivide) // a1 ./ a2
DEF_CLASS_BINOP (power) // a1 .^ a2
DEF_CLASS_BINOP (ldivide) // a1 .\ a2
DEF_CLASS_BINOP (and) // a1 & a2
DEF_CLASS_BINOP (or) // a1 | a2
#undef DEF_CLASS_BINOP
void
install_class_ops (octave::type_info& ti)
{
ti.install_unary_class_op (octave_value::op_not, oct_unop_not);
ti.install_unary_class_op (octave_value::op_uplus, oct_unop_uplus);
ti.install_unary_class_op (octave_value::op_uminus, oct_unop_uminus);
ti.install_unary_class_op (octave_value::op_transpose, oct_unop_transpose);
ti.install_unary_class_op (octave_value::op_hermitian, oct_unop_ctranspose);
ti.install_binary_class_op (octave_value::op_add, oct_binop_plus);
ti.install_binary_class_op (octave_value::op_sub, oct_binop_minus);
ti.install_binary_class_op (octave_value::op_mul, oct_binop_mtimes);
ti.install_binary_class_op (octave_value::op_div, oct_binop_mrdivide);
ti.install_binary_class_op (octave_value::op_pow, oct_binop_mpower);
ti.install_binary_class_op (octave_value::op_ldiv, oct_binop_mldivide);
ti.install_binary_class_op (octave_value::op_lt, oct_binop_lt);
ti.install_binary_class_op (octave_value::op_le, oct_binop_le);
ti.install_binary_class_op (octave_value::op_eq, oct_binop_eq);
ti.install_binary_class_op (octave_value::op_ge, oct_binop_ge);
ti.install_binary_class_op (octave_value::op_gt, oct_binop_gt);
ti.install_binary_class_op (octave_value::op_ne, oct_binop_ne);
ti.install_binary_class_op (octave_value::op_el_mul, oct_binop_times);
ti.install_binary_class_op (octave_value::op_el_div, oct_binop_rdivide);
ti.install_binary_class_op (octave_value::op_el_pow, oct_binop_power);
ti.install_binary_class_op (octave_value::op_el_ldiv, oct_binop_ldivide);
ti.install_binary_class_op (octave_value::op_el_and, oct_binop_and);
ti.install_binary_class_op (octave_value::op_el_or, oct_binop_or);
}
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