boost learn notes
boost learn notes
Get Started
example.cpp
#include <boost/lambda/lambda.hpp> #include <iostream> #include <iterator> #include <algorithm> int main() { using namespace boost::lambda; typedef std::istream_iterator<int> in; std::for_each( in(std::cin), in(), std::cout << (_1 * 3) << " " ); }
Build it
cl /EHsc /I <path-to-boost> example.cpp
Run initcl if cl is not available.
Run it
echo 1 2 3 | example
Further reading material
boost::any
以单个对象接受所有型别的数据,以any_cast取出数据。
template<typename ValueType> ValueType * any_cast(any * operand) { return operand && operand->type() == typeid(ValueType) ? &static_cast<any::holder<ValueType> *>(operand->content)->held:0; }
boost::type_traits
type traits的动机是分派,已实现函数重载。
is_array的简化版
template<bool b_> struct bool_type{ static const bool value = b_; }; template<bool b_> const bool bool_type<b_>::value; template<typename T> struct is_array : bool_type<false>{ }; template<typename T> struct is_array<T[]>: bool_type<true>{ }; template<typename T, unsigned int N> struct is_array<T[N]> : bool_type<true>{ }; int main() { bool is_1 = is_array<int[]>::value; bool is_2 = is_array<int[5]>::value; bool is_3 = is_array<int>::value; }
Post by: Jalen Wang (转载请注明出处)
posted on 2013-05-07 10:13 Jalen Wang 阅读(186) 评论(0) 编辑 收藏 举报