forked from boostorg/fusion
Merged revisions 42180-42235 via svnmerge from
https://svn.boost.org/svn/boost/trunk ........ r42194 | anthonyw | 2007-12-19 23:46:00 -0800 (Wed, 19 Dec 2007) | 1 line added missing parentheses ........ r42195 | anthonyw | 2007-12-20 00:37:02 -0800 (Thu, 20 Dec 2007) | 1 line added hardware_concurrency support for apple, freebsd and sun platforms ........ r42196 | niels_dekker | 2007-12-20 01:09:44 -0800 (Thu, 20 Dec 2007) | 1 line Removed "mark-expected-failures" from value_init_test, for both Borland and GCC, as value_init.hpp changeset [41942] provides a workaround for them. ........ r42202 | fmhess | 2007-12-20 06:39:53 -0800 (Thu, 20 Dec 2007) | 6 lines Made putting the name of a typedef inside a "classname" element successfully produce a link to the typedef's reference documentation, or to the typedef's synopsis if that is all it has. ........ r42217 | vladimir_prus | 2007-12-20 13:18:47 -0800 (Thu, 20 Dec 2007) | 1 line Explain a couple of gcc limitations with precompiled headers ........ r42220 | matias | 2007-12-20 13:56:39 -0800 (Thu, 20 Dec 2007) | 1 line add explicit std::string initialization ........ r42221 | matias | 2007-12-20 13:59:18 -0800 (Thu, 20 Dec 2007) | 1 line add license to each html page ........ r42222 | matias | 2007-12-20 14:15:11 -0800 (Thu, 20 Dec 2007) | 1 line Time out: test_bimap_property_map @ gcc-3.4.6_linux_x86_64 ........ r42223 | djowel | 2007-12-20 15:24:28 -0800 (Thu, 20 Dec 2007) | 1 line Removing fusion variant adapter ........ r42224 | djowel | 2007-12-20 15:28:26 -0800 (Thu, 20 Dec 2007) | 1 line Removing fusion variant adapter ........ r42227 | nmusatti | 2007-12-20 23:03:44 -0800 (Thu, 20 Dec 2007) | 1 line Increased the latest supported version to 5.9.3, corresponding to the December 2007 update. ........ r42228 | anthonyw | 2007-12-21 02:54:59 -0800 (Fri, 21 Dec 2007) | 1 line Updated thread ID test ........ r42229 | anthonyw | 2007-12-21 03:05:37 -0800 (Fri, 21 Dec 2007) | 1 line Markup hardware_concurrency failure as expected on tru64 platforms, as support is not implemented ........ r42234 | dgregor | 2007-12-21 13:18:17 -0800 (Fri, 21 Dec 2007) | 1 line Reduce header dependencies, from Shunsuke Sogame. Fixes #1535 ........ [SVN r42236]
This commit is contained in:
Eric Niebler
+97
-18
@@ -16,6 +16,9 @@ they will be regarded as first-class, fully conforming fusion sequences
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sequences (see __intrinsics__). That way, we can have 2-way adaptation to
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and from __mpl__ and Fusion].
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Fusion also provides various schemes to make it easy for the user to adapt
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various data structures, non-intrusively, as full fledged Fusion sequences.
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[heading Header]
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#include <boost/fusion/adapted.hpp>
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@@ -136,32 +139,108 @@ __boost_tuple_library__
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[endsect]
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[section boost::variant]
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This module provides adapters for `boost::variant`. Including the module
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header makes `boost::variant` a fully conforming __forward_sequence__.
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The variant acts as a sequence of the types that can be contained in the variant.
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Accessing types not currently stored int the variant will lead to the variant
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being populated with a default constructed value of that type.
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[section:adapt_struct BOOST_FUSION_ADAPT_STRUCT]
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[heading Description]
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BOOST_FUSION_ADAPT_STRUCT is a macro that can be used to generate all the
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necessary boilerplate to make an arbitrary struct into a __random_access_sequence__.
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[heading Synopsis]
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BOOST_FUSION_ADAPT_STRUCT(
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struct_name
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(member_type0, member_name0)
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(member_type1, member_name1)
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...
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)
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[heading Semantics]
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The above macro generates the necessary code to adapt `struct_name`
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as a model of __random_access_sequence__. The sequence of `(member_typeN, member_nameN)`
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pairs declare the type and names of each of the struct members that will be
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part of the sequence.
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The macro should be used at global scope, and `struct_name` should be the fully
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namespace qualified name of the struct to be converted.
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[heading Header]
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#include <boost/fusion/adapted/variant.hpp>
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#include <boost/fusion/include/variant.hpp>
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[heading Model of]
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* __forward_sequence__
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#include <boost/fusion/adapted/struct/adapt_struct.hpp>
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#include <boost/fusion/include/adapt_struct.hpp>
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[heading Example]
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namespace demo
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{
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struct employee
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{
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std::string name;
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int age;
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};
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}
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boost::variant<int,std::string> example_variant = 101;
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std::cout << example_variant << '\n';
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*boost::fusion::find<std::string>(example_variant) = "hello";
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std::cout << example_variant << '\n';
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// demo::employee is now a Fusion sequence
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BOOST_FUSION_ADAPT_STRUCT(
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demo::employee
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(std::string, name)
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(int, age))
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[heading See also]
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[endsect]
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[section:adapt_assoc BOOST_FUSION_ADAPT_ASSOC_STRUCT]
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[heading Description]
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BOOST_FUSION_ADAPT_ASSOC_STRUCT is a macro that can be used to generate all the
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necessary boilerplate to make an arbitrary struct into a model of __random_access_sequence__
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and __associative_sequence__.
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[heading Synopsis]
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BOOST_FUSION_ADAPT_ASSOC_STRUCT(
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struct_name
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(member_type0, member_name0, key_type0)
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(member_type1, member_name1, key_type1)
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...
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)
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[heading Semantics]
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The above macro generates the necessary code to adapt `struct_name`
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as a model of __random_access_sequence__ and __associative_sequence__.
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The sequence of `(member_typeN, member_nameN, key_typeN)`
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triples declare the type, name and key type of each of the struct members
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that will be part of the sequence.
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The macro should be used at global scope, and `struct_name` should be the fully
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namespace qualified name of the struct to be converted.
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[heading Header]
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#include <boost/fusion/adapted/struct/adapt_assoc_struct.hpp>
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#include <boost/fusion/include/adapt_assoc_struct.hpp>
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[heading Example]
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namespace demo
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{
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struct employee
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{
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std::string name;
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int age;
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};
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}
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namespace keys
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{
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struct name;
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struct age;
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}
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// demo::employee is now a Fusion sequence
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// It is also an associative sequence with
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// keys keys::name and keys::age present.
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BOOST_FUSION_ADAPT_ASSOC_STRUCT(
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demo::employee
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(std::string, name, keys::name)
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(int, age, keys::age))
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__boost_variant_library__
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[endsect]
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