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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1996-2021 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 (HAVE_CONFIG_H)
# include "config.h"
#endif
#include "interpreter.h"
#include "ov.h"
#include "profiler.h"
#include "pt-unop.h"
namespace octave
{
// Unary expressions.
std::string
tree_unary_expression::oper (void) const
{
return octave_value::unary_op_as_string (m_etype);
}
// Prefix expressions.
tree_expression *
tree_prefix_expression::dup (symbol_scope& scope) const
{
tree_prefix_expression *new_pe
= new tree_prefix_expression (m_op ? m_op->dup (scope) : nullptr,
line (), column (), m_etype);
new_pe->copy_base (*this);
return new_pe;
}
octave_value
tree_prefix_expression::evaluate (tree_evaluator& tw, int)
{
octave_value val;
if (m_op)
{
if (m_etype == octave_value::op_incr
|| m_etype == octave_value::op_decr)
{
octave_lvalue op_ref = m_op->lvalue (tw);
profiler::enter<tree_prefix_expression>
block (tw.get_profiler (), *this);
op_ref.do_unary_op (m_etype);
val = op_ref.value ();
}
else
{
octave_value op_val = m_op->evaluate (tw);
if (op_val.is_defined ())
{
profiler::enter<tree_prefix_expression>
block (tw.get_profiler (), *this);
// Attempt to do the operation in-place if it is unshared
// (a temporary expression).
if (op_val.get_count () == 1)
val = op_val.do_non_const_unary_op (m_etype);
else
{
interpreter& interp = tw.get_interpreter ();
type_info& ti = interp.get_type_info ();
val = ::do_unary_op (ti, m_etype, op_val);
}
}
}
}
return val;
}
// Postfix expressions.
tree_expression *
tree_postfix_expression::dup (symbol_scope& scope) const
{
tree_postfix_expression *new_pe
= new tree_postfix_expression (m_op ? m_op->dup (scope) : nullptr,
line (), column (), m_etype);
new_pe->copy_base (*this);
return new_pe;
}
octave_value
tree_postfix_expression::evaluate (tree_evaluator& tw, int)
{
octave_value val;
if (m_op)
{
if (m_etype == octave_value::op_incr
|| m_etype == octave_value::op_decr)
{
octave_lvalue ref = m_op->lvalue (tw);
val = ref.value ();
profiler::enter<tree_postfix_expression>
block (tw.get_profiler (), *this);
ref.do_unary_op (m_etype);
}
else
{
octave_value op_val = m_op->evaluate (tw);
if (op_val.is_defined ())
{
profiler::enter<tree_postfix_expression>
block (tw.get_profiler (), *this);
interpreter& interp = tw.get_interpreter ();
type_info& ti = interp.get_type_info ();
val = ::do_unary_op (ti, m_etype, op_val);
}
}
}
return val;
}
}
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