[29] | 1 | <?xml version="1.0" encoding="utf-8"?> |
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| 2 | <!DOCTYPE library PUBLIC "-//Boost//DTD BoostBook XML V1.0//EN" |
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| 3 | "http://www.boost.org/tools/boostbook/dtd/boostbook.dtd"> |
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| 4 | <library name="Function" dirname="function" id="function" |
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| 5 | last-revision="$Date: 2004/07/25 02:51:51 $" |
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| 6 | xmlns:xi="http://www.w3.org/2001/XInclude"> |
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| 7 | <libraryinfo> |
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| 8 | <author> |
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| 9 | <firstname>Douglas</firstname> |
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| 10 | <surname>Gregor</surname> |
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| 11 | <email>dgregor -at- cs.indiana.edu</email> |
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| 12 | </author> |
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| 13 | |
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| 14 | <copyright> |
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| 15 | <year>2001</year> |
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| 16 | <year>2002</year> |
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| 17 | <year>2003</year> |
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| 18 | <year>2004</year> |
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| 19 | <holder>Douglas Gregor</holder> |
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| 20 | </copyright> |
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| 21 | |
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| 22 | <legalnotice> |
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| 23 | <para>Use, modification and distribution is subject to the Boost |
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| 24 | Software License, Version 1.0. (See accompanying file |
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| 25 | <filename>LICENSE_1_0.txt</filename> or copy at <ulink |
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| 26 | url="http://www.boost.org/LICENSE_1_0.txt">http://www.boost.org/LICENSE_1_0.txt</ulink>)</para> |
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| 27 | </legalnotice> |
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| 28 | |
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| 29 | <librarypurpose>Function object wrappers for deferred calls or callbacks</librarypurpose> |
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| 30 | <librarycategory name="category:higher-order"/> |
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| 31 | </libraryinfo> |
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| 32 | |
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| 33 | <title>Boost.Function</title> |
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| 34 | |
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| 35 | <section id="function.intro"> |
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| 36 | <title>Introduction</title> |
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| 37 | <para>The Boost.Function library contains a family of class templates |
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| 38 | that are function object wrappers. The notion is similar to a |
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| 39 | generalized callback. It shares features with function pointers in |
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| 40 | that both define a call interface (e.g., a function taking two integer |
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| 41 | arguments and returning a floating-point value) through which some |
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| 42 | implementation can be called, and the implementation that is invoked |
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| 43 | may change throughout the course of the program.</para> |
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| 44 | |
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| 45 | <para> Generally, any place in which a function pointer would be used |
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| 46 | to defer a call or make a callback, Boost.Function can be used instead |
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| 47 | to allow the user greater flexibility in the implementation of the |
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| 48 | target. Targets can be any 'compatible' function object (or function |
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| 49 | pointer), meaning that the arguments to the interface designated by |
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| 50 | Boost.Function can be converted to the arguments of the target |
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| 51 | function object.</para> |
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| 52 | </section> |
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| 53 | |
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| 54 | <xi:include href="history.xml"/> |
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| 55 | <xi:include href="tutorial.xml"/> |
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| 56 | <xi:include href="reference.xml"/> |
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| 57 | <xi:include href="faq.xml"/> |
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| 58 | <xi:include href="misc.xml"/> |
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| 59 | <xi:include href="tests.xml"/> |
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| 60 | |
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| 61 | </library> |
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