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            Error

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            原因:

            1.文檔不夠完善

            2.熟悉程度不夠,學(xué)習(xí)曲線比較陡峭,直接用有可能失控

            3.實現(xiàn)太過復(fù)雜,還需要mpl庫的支持

            4.如果使用,iostreams將成為底層,整個項目都會對其依賴,有風(fēng)險

            5.說白了,還是能力不夠,不過了解了一些iostreams歸納出來的concepts也是非常有收貨。

            6.網(wǎng)上的一句歸納:

            在真正掌握模版之前盡量少用

            //////////////////////////////////////////////

            Device Concepts

            The most important Device concepts are these:

            • Device: Base for all Device concepts, provides associated character type and category.
            • Source: Provides read-only access to a sequence of characters.
            • Sink: Provides write-only access to a sequence of characters.
            • BidirectionalDevice: Provides access to two separate sequences of characters, one for reading and the other for writing.
            • SeekableDevice: Provides read-write access to a single sequence of characters, with a single repositionable read/write head.

            Filter Concepts

            The most important Filter concepts are these:

            • Filter: Base for all Filter concepts, provides associated character type and category.
            • InputFilter: Filters characters read from a Source.
            • OutputFilter: Filters characters written to a Sink
            • BidirectionalFilter: Filters two separate character sequences, one read from a Sink and the other written to a Sink.
            • SeekableFilter: Filters a single characters sequence, controlled by a SeekableDevice, providing filtered input, output and random access with a single repositionable read/write head

            Optional Behavior

            Boost.Iostreams prvides several concepts corresponding to optional behavior that a Filter or Device might implement:

            • Blocking: A Device which blocks when it receives a read or write request until all requested characters are available, or until the end of a stream is reached.
            • Direct: A Device which provides access to its controlled sequences as regions of memory rather than via a socket-like interface.
            • Closable: A Filter or Device which receives notifications immediately before a stream is closed.
            • Flushable A Filter or Device which receives notifications when a stream is flushed.
            • Localizable: A Filter or Device which receives notifications when the locale of a stream or stream buffer is set using basic_ios::imbue or basic_streambuf::pubimbue.
            • Multi-Character: A Filter which provides access to its controlled sequences several characters at a time, via a socket-like interface.
            • OptimallyBuffered A Filter or Device which will be fitted with a buffer of custom size if no buffer size is explicitly requested by the user.
            • Peekable: A source which allows characters to be put back to the input sequence.
            • Pipable: A Filter which can appear in pipelines.
            posted on 2012-11-19 16:17 Enic 閱讀(227) 評論(0)  編輯 收藏 引用 所屬分類: boost::iostream
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