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# C++ skeleton for Bison
# Copyright (C) 2002-2011 Free Software Foundation, Inc.
# This program 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.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
m4_pushdef([b4_copyright_years],
[2002-2011])
# We do want M4 expansion after # for CPP macros.
m4_changecom()
m4_divert_push(0)dnl
@output(b4_dir_prefix[]stack.hh@)@
b4_copyright([Stack handling for Bison parsers in C++])[
#ifndef BISON_STACK_HH
# define BISON_STACK_HH
#include <deque>
]b4_namespace_open[
template <class T, class S = std::deque<T> >
class stack
{
public:
// Hide our reversed order.
typedef typename S::reverse_iterator iterator;
typedef typename S::const_reverse_iterator const_iterator;
stack ()
: seq_ ()
{
}
stack (unsigned int n)
: seq_ (n)
{
}
inline
T&
operator [] (unsigned int i)
{
return seq_[i];
}
inline
const T&
operator [] (unsigned int i) const
{
return seq_[i];
}
inline
void
push (const T& t)
{
seq_.push_front (t);
}
inline
void
pop (unsigned int n = 1)
{
for (; n; --n)
seq_.pop_front ();
}
inline
typename S::size_type
size () const
{
return seq_.size ();
}
inline
const_iterator
begin () const
{
return seq_.rbegin ();
}
inline
const_iterator
end () const
{
return seq_.rend ();
}
private:
/// The wrapped container.
S seq_;
};
/// Present a slice of the top of a stack.
template <class T, class S = stack<T> >
class slice
{
public:
slice (const S& stack, unsigned int range)
: stack_ (stack),
range_ (range)
{
}
inline
const T&
operator [] (unsigned int i) const
{
return stack_[range_ - i];
}
private:
const S& stack_;
unsigned int range_;
};
]b4_namespace_close[
#endif // not BISON_STACK_HH[]dnl
]
m4_divert_pop(0)
m4_popdef([b4_copyright_years])dnl
m4_changecom([#])
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