mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-25 00:43:44 +00:00
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2016 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_WEED_PARSER_DIRECTIVE_REPLACE_HPP
|
|
#define SPROUT_WEED_PARSER_DIRECTIVE_REPLACE_HPP
|
|
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/workaround/std/cstddef.hpp>
|
|
#include <sprout/type_traits/identity.hpp>
|
|
#include <sprout/weed/unused.hpp>
|
|
#include <sprout/weed/parser_result.hpp>
|
|
#include <sprout/weed/expr/make_terminal_or_expr.hpp>
|
|
#include <sprout/weed/expr/eval.hpp>
|
|
#include <sprout/weed/parser/parser_base.hpp>
|
|
#include <sprout/weed/traits/expr/terminal_or_expr_of.hpp>
|
|
#include <sprout/weed/traits/parser/attribute_of.hpp>
|
|
|
|
namespace sprout {
|
|
namespace weed {
|
|
//
|
|
// replace_p
|
|
//
|
|
template<typename Parser, typename T>
|
|
struct replace_p
|
|
: public sprout::weed::parser_base
|
|
{
|
|
public:
|
|
typedef T value_type;
|
|
template<typename Context, typename Iterator>
|
|
struct attribute
|
|
: public sprout::identity<value_type>
|
|
{};
|
|
template<typename Context, typename Iterator>
|
|
struct result
|
|
: public sprout::identity<sprout::weed::parser_result<Iterator, typename attribute<Context, Iterator>::type> >
|
|
{};
|
|
private:
|
|
typedef typename sprout::weed::traits::terminal_or_expr_of<Parser>::type expr_type;
|
|
private:
|
|
expr_type expr_;
|
|
value_type value_;
|
|
private:
|
|
template<typename Context, typename Iterator, typename Result>
|
|
SPROUT_CONSTEXPR typename result<Context, Iterator>::type call(
|
|
Iterator first,
|
|
Result const& res
|
|
) const
|
|
{
|
|
typedef typename result<Context, Iterator>::type result_type;
|
|
return res.success()
|
|
? result_type(true, res.current(), value_)
|
|
: result_type(false, first, value_)
|
|
;
|
|
}
|
|
public:
|
|
SPROUT_CONSTEXPR replace_p() SPROUT_DEFAULTED_DEFAULT_CONSTRUCTOR_DECL
|
|
SPROUT_CONSTEXPR replace_p(
|
|
Parser const& p,
|
|
value_type const& value
|
|
)
|
|
: expr_(sprout::weed::make_terminal_or_expr(p))
|
|
, value_(value)
|
|
{}
|
|
template<typename Context, typename Iterator>
|
|
SPROUT_CONSTEXPR typename result<Context, Iterator>::type operator()(
|
|
Iterator first, Iterator,
|
|
Context const& ctx
|
|
) const
|
|
{
|
|
return call<Context>(first, sprout::weed::eval(expr_, ctx));
|
|
}
|
|
};
|
|
//
|
|
// replace_d
|
|
//
|
|
template<typename T>
|
|
struct replace_d {
|
|
public:
|
|
typedef T value_type;
|
|
private:
|
|
value_type value_;
|
|
public:
|
|
explicit SPROUT_CONSTEXPR replace_d(value_type const& value)
|
|
: value_(value)
|
|
{}
|
|
template<typename Parser>
|
|
SPROUT_CONSTEXPR sprout::weed::replace_p<Parser, value_type> operator[](Parser const& p) const {
|
|
return sprout::weed::replace_p<Parser, value_type>(p, value_);
|
|
}
|
|
};
|
|
//
|
|
// replace_g
|
|
//
|
|
struct replace_g {
|
|
public:
|
|
template<typename T>
|
|
SPROUT_CONSTEXPR sprout::weed::replace_d<T> operator()(T const& value) const {
|
|
return sprout::weed::replace_d<T>(value);
|
|
}
|
|
};
|
|
//
|
|
// replace
|
|
//
|
|
SPROUT_CONSTEXPR sprout::weed::replace_g replace = sprout::weed::replace_g();
|
|
} // namespace weed
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_WEED_PARSER_DIRECTIVE_REPLACE_HPP
|