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##
## kelbt.spec -- OpenPKG RPM Package Specification
## Copyright (c) 2000-2022 OpenPKG Project <http://openpkg.org/>
##
## Permission to use, copy, modify, and distribute this software for
## any purpose with or without fee is hereby granted, provided that
## the above copyright notice and this permission notice appear in all
## copies.
##
## THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
## WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
## MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
## IN NO EVENT SHALL THE AUTHORS AND COPYRIGHT HOLDERS AND THEIR
## CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
## USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
## OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
## OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
## SUCH DAMAGE.
##
# package information
Name: kelbt
Summary: Backtracking LALR(1) Parser Generator
URL: http://www.colm.net/open-source/kelbt/
Vendor: Adrian Thurston
Packager: OpenPKG Project
Distribution: OpenPKG Community
Class: EVAL
Group: CompilerCompiler
License: GPL
Version: 0.15
Release: 20150927
# list of sources
Source0: http://www.colm.net/files/kelbt/kelbt-%{version}.tar.gz
Patch0: kelbt.patch
# build information
BuildPreReq: OpenPKG, openpkg >= 20160101, gcc, gcc::with_cxx = yes
PreReq: OpenPKG, openpkg >= 20160101
%description
Kelbt generates backtracking LALR(1) parsers. Where traditional
LALR(1) parser generators require static resolution of shift/reduce
conflicts, Kelbt generates parsers that handle conflicts by
backtracking at runtime. Kelbt is able to generate a parser for any
context-free grammar that is free of hidden left recursion. Kelbt
is different from other backtracking LR systems in two ways. First,
it introduces a class of actions called undo actions. These actions
are invoked as the backtracker undoes parsing and allow the user
to revert any side effects of forward semantic actions. This makes
it possible to backtrack over language constructs that must modify
global state in preparation for handling context dependencies.
Second, Kelbt enables a user-controlled parsing strategy that
approximates that of generalized recursive-descent parsing with
ordered choice. This makes it easy for the user to resolve language
ambiguities by ordering the grammar productions of a non-terminal
according to precedence. It is approximate in the sense that for
most grammars the equivalent of an ordered choice parsing strategy
is achieved. In cases where productions are parsed out of the order
given, there is a simple grammar transformation that remedies the
problem.
%track
prog kelbt = {
version = %{version}
url = http://www.complang.org/kelbt/
regex = kelbt-(__VER__)\.tar\.gz
}
%prep
%setup -q
%patch -p0
%build
CC="%{l_cc} %{l_cflags -O}" \
CXX="%{l_cxx} %{l_cxxflags -O}" \
CFLAGS="%{l_cflags -O}" \
CXXFLAGS="%{l_cxxflags -O}" \
CPPFLAGS="%{l_cppflags}" \
LDFLAGS="%{l_ldflags}" \
./configure \
--prefix=%{l_prefix}
%{l_make} %{l_mflags -O}
%install
%{l_make} %{l_mflags} install \
prefix=$RPM_BUILD_ROOT%{l_prefix}
strip $RPM_BUILD_ROOT%{l_prefix}/bin/* >/dev/null 2>&1 || true
%{l_shtool} mkdir -f -p -m 755 \
$RPM_BUILD_ROOT%{l_prefix}/man/man1
%{l_shtool} install -c -m 644 \
kelbt.1 $RPM_BUILD_ROOT%{l_prefix}/man/man1/
%{l_rpmtool} files -v -ofiles -r$RPM_BUILD_ROOT %{l_files_std}
%files -f files
%clean