mirror of
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127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
/*=============================================================================
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Copyright (c) 2002 2004 2006 Joel de Guzman
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http://spirit.sourceforge.net/
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP)
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#define BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP
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#include <cassert>
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#include <deque>
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#include <string>
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#include <vector>
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#include <boost/assert.hpp>
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#include <boost/filesystem/path.hpp>
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#include <boost/next_prior.hpp>
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#include <boost/spirit/include/classic_functor_parser.hpp>
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#include <boost/spirit/include/classic_symbols.hpp>
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#include <boost/tuple/tuple.hpp>
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#include "fwd.hpp"
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#include "template_tags.hpp"
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#include "values.hpp"
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namespace quickbook
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{
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namespace fs = boost::filesystem;
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struct template_scope;
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struct template_symbol
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{
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template_symbol(
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std::string const& identifier,
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std::vector<std::string> const& params,
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value const& content,
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template_scope const* parent = 0);
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std::string identifier;
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std::vector<std::string> params;
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value content;
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template_scope const* lexical_parent;
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};
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typedef boost::spirit::classic::symbols<template_symbol> template_symbols;
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// template scope
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//
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// 1.4-: parent_scope is the previous scope on the dynamic
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// lookup chain. This moves up the stack skipping
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// 1.5 templates (but not 1.5 included files).
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// 1.5+: parent_scope is the template's lexical parent.
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//
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// This means that a search along the parent_scope chain will follow the
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// correct lookup chain for that version of quickboook.
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//
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// symbols contains the templates defined in this scope.
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struct template_scope
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{
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template_scope() : parent_scope(), parent_1_4() {}
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template_scope const* parent_scope;
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template_scope const* parent_1_4;
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template_symbols symbols;
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};
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struct template_stack
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{
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typedef std::deque<template_scope> deque;
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struct parser
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{
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typedef boost::spirit::classic::nil_t result_t;
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parser(template_stack& ts_) : ts(ts_) {}
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template <typename Scanner>
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std::ptrdiff_t operator()(Scanner const& scan, result_t) const
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{
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// search all scopes for the longest matching symbol.
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typename Scanner::iterator_t f = scan.first;
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std::ptrdiff_t len = -1;
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for (template_scope const* i = &*ts.scopes.begin(); i;
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i = i->parent_scope) {
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boost::spirit::classic::match<> m = i->symbols.parse(scan);
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if (m.length() > len) len = m.length();
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scan.first = f;
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}
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if (len >= 0) scan.first = boost::next(f, len);
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return len;
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}
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template_stack& ts;
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private:
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parser& operator=(parser const&);
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};
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template_stack();
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template_symbol* find(std::string const& symbol) const;
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template_symbol* find_top_scope(std::string const& symbol) const;
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template_symbols const& top() const;
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template_scope const& top_scope() const;
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// Add the given template symbol to the current scope.
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// If it doesn't have a scope, sets the symbol's scope to the current
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// scope.
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bool add(template_symbol const&);
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void push();
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void pop();
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void start_template(template_symbol const*);
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boost::spirit::classic::functor_parser<parser> scope;
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private:
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friend struct parser;
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deque scopes;
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template_scope const* parent_1_4;
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template_stack& operator=(template_stack const&);
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};
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}
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#endif // BOOST_SPIRIT_QUICKBOOK_TEMPLATE_STACK_HPP
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