Ichthyostega
5881b014fe
* establish the feature set to provide * choose scheme for runtime representation * break down analysis to individual parsing and execution steps * conclude which actions to conduct and the necessary data * derive the abstract binding API required
133 lines
2.9 KiB
C++
133 lines
2.9 KiB
C++
/*
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TEXT-TEMPLATE.hpp - minimalistic text substitution engine
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Copyright (C) Lumiera.org
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2024, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/** @file text-template.hpp
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** A minimalistic text templating engine with flexible data binding.
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**
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** @todo WIP-WIP-WIP 3/2024
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** @see TextTemplate_test
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** @see gnuplot-gen.hpp
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** @see SchedulerStress_test
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*/
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#ifndef LIB_TEXT_TEMPLATE_H
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#define LIB_TEXT_TEMPLATE_H
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#include "lib/error.hpp"
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#include "lib/nocopy.hpp"
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#include "lib/iter-explorer.hpp"
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#include "lib/format-util.hpp"
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//#include "lib/util.hpp"
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//#include <cmath>
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//#include <limits>
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#include <vector>
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#include <string>
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//#include <stdint.h>
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//#include <boost/rational.hpp>
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namespace lib {
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// using Rat = boost::rational<int64_t>;
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// using boost::rational_cast;
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// using std::abs;
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using std::string;
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namespace {// preconfigured TextTemplate data bindings
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}
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/**
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* Text template substitution engine
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*/
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class TextTemplate
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: util::MoveOnly
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{
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enum Clause {
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IF, FOR
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};
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enum Code {
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TEXT, KEY, COND, JUMP, ITER, LOOP
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};
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struct ParseCtx
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{
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Clause clause;
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};
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struct Action
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{
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Code code;
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string val;
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};
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template<class BIND>
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struct Instance
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{
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};
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using PipeTODO = std::vector<string>;
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using InstanceIter = decltype (explore (std::declval<PipeTODO const&>()));
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public:
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TextTemplate(string spec)
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{ }
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template<class DAT>
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InstanceIter
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render (DAT const& data) const;
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template<class DAT>
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static string
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apply (string spec, DAT const& data);
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};
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/** */
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template<class DAT>
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inline TextTemplate::InstanceIter
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TextTemplate::render (DAT const& data) const
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{
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UNIMPLEMENTED ("actually instantiate the text template");
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}
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/** */
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template<class DAT>
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inline string
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TextTemplate::apply (string spec, DAT const& data)
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{
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return util::join (TextTemplate(spec).render (data)
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,"");
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}
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}// namespace lib
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#endif /*LIB_TEXT_TEMPLATE_H*/
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