{"id":6432,"date":"2022-08-14T18:30:11","date_gmt":"2022-08-14T18:30:11","guid":{"rendered":"https:\/\/www.modernescpp.com\/index.php\/and-the-five-winners-for-c-20-stl-cookbook-are\/"},"modified":"2022-08-14T18:30:11","modified_gmt":"2022-08-14T18:30:11","slug":"and-the-five-winners-for-c-20-stl-cookbook-are","status":"publish","type":"post","link":"https:\/\/www.modernescpp.com\/index.php\/and-the-five-winners-for-c-20-stl-cookbook-are\/","title":{"rendered":"And the Five Winners for the “C++20 STL Cookbook” are"},"content":{"rendered":"

Today, I want to present the five winners for the pdf of the book “C++20 STL Cookbook<\/a>” by Bill Weinman.<\/p>\n

<\/p>\n

 \"CoverBig\"<\/p>\n

To get the book, you had to answer the following question by Bill Weinmann: “What are the major advantages of the C++20 format library over printf and iostream?<\/em>“. Here are the best five answers. Two answers were almost literally identical, but I had to decide for one of them.<\/p>\n

<\/span>Manali<\/span><\/h2>\n
1. Format () is clean, precise , flexible variadic template function in terms of its usage and code readability.<\/div>\n
2. With iostream we use for example: std::cout, std::cin . This use of scope resolution (namespaces) and insertion \/ extraction operations is overcome with help of format function , improving performance and efficiency.<\/div>\n
3. format() function provides type safety ,<\/div>\n
Formatting options, supporting classes and objects , positional arguments.<\/div>\n

<\/span>Uzoochogu<\/span><\/h2>\n

 \"format\"<\/p>\n

<\/span>Gabriel<\/span><\/h2>\n

Disadvantages:
– not Type safe
– it is not extensible because it only supports a specific number of types.<\/p>\n

Advantages:
– Type safe
– now extensible ( yay :D )
– readable
– easier to localize\/translate<\/p>\n

<\/span>Roberto<\/span><\/h2>\n

\"printf\"<\/p>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

\"iostreams\"<\/p>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

\"format1\"<\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

\"format2\"<\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

<\/span> <\/span><\/h2>\n

Demo<\/a><\/p>\n

<\/span>Hyper<\/span><\/h2>\n

my answer is that the C++20 format library provides a rich set of formatting options that exceeds even that of prinf. It provides a positional arguments and is extensible to support more values and classes. It is like it was isnpired by Python str.format method.
the C++20 format() function is a variadic template function which provides type safety, along with the performance and efficiency advantages of iostream. the format library also provides vformat(), a type-erased interface that prevents generating multiple instances of complex template function for each combination of arguments.
the make_formate_arge() function creates a type-erased parameter stack to pass to vformat(), which does the heavy lifting of formatting the string. This is how the format() library operates so efficiently.<\/p>\n

 <\/p>\n

 <\/p>\n<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

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