73ef4ff3
 Hu Chunming
提交三方库
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[#accept]
[section accept]
[h1 Synopsis]
template <class Result, class Remaining, class Pos>
struct accept;
This is a [link metaprogramming_value template metaprogramming value].
[table Arguments
[[Name] [Type]]
[[`Result`] [[link metaprogramming_value template metaprogramming value]]]
[[`Remaining`] [[link string string]]]
[[`Pos`] [[link source_position source position]]]
]
[h1 Description]
Values representing a successful parser application. It behaves as a
[link lazy_metafunction lazy template metafunction]: when it is evaluated as a
metafunction, it returns itself with its arguments evaluated. See expression
semantics for further details.
[note
Note that for backward compatibility when `Result::type` is not defined,
`accept<....>::type` does not evaluate `Result`. For example
`accept<int, BOOST_METAPARSE_STRING("foo"), start>::type` is
`accept<int, BOOST_METAPARSE_STRING("foo")::type, start::type>`. Using types
that are not template metaprogramming values as `Result` is deprecated and
will not work in future versions of the library.
]
[h1 Expressions semantics]
For any `r` template metaprogramming value, `s` compile-time string and `p`
source position the following are equivalent:
accept<r, s, p>::type
accept<r, s::type, p::type>
[h1 Header]
#include <boost/metaparse/accept.hpp>
[h1 Operations]
* [link get_position `get_position`]
* [link get_remaining `get_remaining`]
* [link get_result `get_result`]
[endsect]
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