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1 | [/============================================================================== |
2 | Copyright (C) 2001-2010 Joel de Guzman | |
3 | Copyright (C) 2001-2005 Dan Marsden | |
4 | Copyright (C) 2001-2010 Thomas Heller | |
5 | ||
6 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
7 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
8 | ===============================================================================/] | |
9 | ||
10 | [section Lazy Statements] | |
11 | ||
12 | Lazy statements? Sure. There are lazy versions of the C++ statements we all know | |
13 | and love. For example: | |
14 | ||
15 | if_(arg1 > 5) | |
16 | [ | |
17 | std::cout << arg1 | |
18 | ] | |
19 | ||
20 | Say, for example, we wish to print all the elements that are greater than 5 | |
21 | (separated by a comma) in a vector. Here's how we write it: | |
22 | ||
23 | std::for_each(v.begin(), v.end(), | |
24 | if_(arg1 > 5) | |
25 | [ | |
26 | std::cout << arg1 << ", " | |
27 | ] | |
28 | ); | |
29 | ||
30 | (See [@../../example/if.cpp if.cpp]) | |
31 | ||
32 | [blurb __tip__ Learn more about statements [link phoenix.modules.statement here.]] | |
33 | ||
34 | [endsect] |