boost c tutorial

// Boost: timer library, used for performance testing and other tasks that require timing. // Boost: timer is not suitable for high-precision time measurement tasks. Its accuracy depends on the operating system or compiler, and it is difficult to achieve cross-platform. // Boost: timer is not suitable for measuring the time span of a large span. The maximum span

Shared_from_this () in a class, you need to pass the shared_ptr of the Class Object to use the shared_from_this function to obtain the shared_ptr pointing to itself. It is a member function of enable_shared_from_this Note that this function can be used only after the shared_ptr A) the following code is incorrect: class D:public boost::enable_shared_from_this The reason is very simple. Although the constructor of enable_shared_from_this B) the followin

Bitset is similar to vector The advantages and disadvantages of vector The appearance of boost. dynamic_bitset just fills the gap between the two. It is similar to the bitset of the standard library and provides a wide range of bitwise operations, and the length is dynamically changeable.Dynamic_bitset is located in the namespace boost. To use the dynamic_bitset component, the header file # Include Using na

The io_service: Work class can enable the io_service: Run function to not return the result when no task exists until the work object is destroyed. Void test_asio_nowork () {boost: ASIO: io_service Ios; print_debug ("iOS before"); IOs. run (); print_debug ("iOS end");} void test_asio_work () {boost: ASIO: io_service Ios; // Add a work object boost: ASIO :: io_se

. You can use // or /*... */Method to comment out some code; C. You can use # define for macro definition; D. the default values of local_size_x, expires, and dimensions are 1. local_size_x and local_size_y can be omitted, or local_size_z can be omitted if local_size_x is defined. For example, the return value of the following text should be (32, 16, 1 ). # Version 430 Core# Define local_x32// Layout (local_size_x = 16, local_size_y = 13, local_size_z = 2) in;Layout (local_size_x = loc

My blog cannot be updated because I have been ill for many days. .The Finder is an imitation function used to search any part of a container. It cannot be used independently. The search result is given in the form of an iterator_range that limits the selected part. Common functionsFind,Find_format, find_format_copy,Find_format_all, find_format_all_copyFind_iterator factory method: make_find_iterator, make_split_iteratorFind_iterator constructor: find_iterator, split_iteratorIter_find, iter_split

1. Overview C ++ 98 provides the string standard class STD: string. it has some member functions that can search for substrings, access characters, and perform basic string processing functions. since STD: String conforms to the container definition, it can also be considered as a sequence container with the element type char (or wchar T), and can be computed using a standard algorithm, however, the standard algorithm is not customized for string processing, and is often "clumsy ".The appearance

// Operator + = // advantage: it can be applied to standard containers (vector, list, set, MAP, etc.) defined in STL. // disadvantage: void test_assign_plus () {using namespace boost: Assign; // 1. vectorstd: vector

required to generate the current offset.For example, the string "122501" is decomposed by offset (2, 2, 4,If breturnpartiallast is true, it is decomposed into 12 25 01.If it is false, it is decomposed into 12 25, and then it ends because there are only 2 Characters and less than 4 characters in the sequence. Example Void test_string_tokenizer () {using namespace boost; // 1. use the default template parameters to create Word Segmentation object

Template Example: Void test_string_join () {using namespace boost: Assign; STD: vector

This article is based on the boost tutorial. This section describes how to use a boost function object.What is boost functionboost function? Boost functions are a combination of classes and templates used to encapsulate various functions. It is similar to a function pointer,

(BOOST_CURRENT_FUNCTION)The BOOST_LOG_NAMED_SCOPE macro is also defined in this file: /*! * Macro for scope markup. The specified scope name is pushed to the end of the current thread scope list. */#define BOOST_LOG_NAMED_SCOPE(name)\ BOOST_LOG_NAMED_SCOPE_INTERNAL(BOOST_LOG_UNIQUE_IDENTIFIER_NAME(_boost_log_named_scope_sentry_), name, __FILE__, __LINE__) #define BOOST_LOG_NAMED_SCOPE_INTERNAL(var, name, file, line)\ BOOST_LOG_UNUSED_VARIABLE(::boos