mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 12:23:04 +00:00
064e42b0ac
* origin/maint: parser: accept #line NUM m4: use a safer pattern to enable/disable output tests: beware of gnulib's need for config.h gnulib: update yacc.c, glr.c: check and fix the display of locations formatting changes glr.c: remove stray macro Conflicts: data/c.m4 data/glr.cc data/lalr1.cc data/lalr1.java data/location.cc data/stack.hh data/yacc.c src/scan-gram.l
143 lines
2.6 KiB
C++
143 lines
2.6 KiB
C++
# C++ skeleton for Bison
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# Copyright (C) 2002-2012 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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m4_pushdef([b4_copyright_years],
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[2002-2012])
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# b4_stack_define
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# ---------------
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m4_define([b4_stack_define],
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[[ template <class T, class S = std::deque<T> >
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class stack
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{
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public:
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// Hide our reversed order.
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typedef typename S::reverse_iterator iterator;
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typedef typename S::const_reverse_iterator const_iterator;
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stack ()
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: seq_ ()
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{
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}
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stack (unsigned int n)
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: seq_ (n)
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{
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}
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inline
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T&
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operator [] (unsigned int i)
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{
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return seq_[i];
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}
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inline
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const T&
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operator [] (unsigned int i) const
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{
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return seq_[i];
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}
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inline
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void
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push (const T& t)
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{
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seq_.push_front (t);
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}
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inline
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void
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pop (unsigned int n = 1)
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{
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for (; n; --n)
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seq_.pop_front ();
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}
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inline
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typename S::size_type
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size () const
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{
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return seq_.size ();
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}
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inline
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const_iterator
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begin () const
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{
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return seq_.rbegin ();
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}
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inline
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const_iterator
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end () const
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{
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return seq_.rend ();
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}
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private:
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/// The wrapped container.
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S seq_;
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};
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/// Present a slice of the top of a stack.
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template <class T, class S = stack<T> >
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class slice
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{
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public:
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slice (const S& stack, unsigned int range)
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: stack_ (stack)
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, range_ (range)
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{
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}
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inline
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const T&
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operator [] (unsigned int i) const
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{
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return stack_[range_ - i];
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}
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private:
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const S& stack_;
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unsigned int range_;
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};
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]])
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b4_defines_if(
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[b4_output_begin([b4_dir_prefix[]stack.hh])
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b4_copyright([Stack handling for Bison parsers in C++])[
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/**
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** \file ]b4_dir_prefix[stack.hh
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** Define the ]b4_namespace_ref[::stack class.
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*/
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]b4_cpp_guard_open([b4_dir_prefix[]stack.hh])[
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# include <deque>
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]b4_namespace_open[
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]b4_stack_define[
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]b4_namespace_close[
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]b4_cpp_guard_close([b4_dir_prefix[]stack.hh])
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b4_output_end()
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])
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m4_popdef([b4_copyright_years])
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