Template Metaprogramming: Type Traits Part 1 CppCon 2020 1 Jody Hagins
 jhagins@maystreet.com 
 coachhagins@gmail.comTemplate Metaprogramming: Type Traits CppCon 2020 2 IntroductionIntended Audience oriented: shallow depth, slow current • Not necessarily beginner to C++, but beginner to traditional template metaprogramming techniques 3Intended Audience • Beginner/Intermediate • Gentle entry: swimming oriented: shallow depth, slow current • Not necessarily beginner to C++, but beginner to traditional template metaprogramming techniques • Type traits part of standard library for ~10 years 3Intended Audience

1 / 58Template Metaprogramming (TMP) Template Metaprogramming (TMP) template using meta_fun = this_talk; 2 / 58❓static_assert(Template::Metaprogramming::is_hard); // ✔ 3 / 58❓s 58❓static_assert(Template::Metaprogramming::is_hard); // ✔ ❓static_assert(Template::Metaprogramming::is_powerful); // ✔ 3 / 58❓static_assert(Template::Metaprogramming::is_hard); // ✔ ❓static_assert( ❓static_assert(Template::Metaprogramming::is_powerful); // ✔ ❓static_assert(( Template::Metaprogramming::is_easy and Template::Metaprogramming::is_powerful and Template::Metaprogramming::has_nice_error_messages

Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules to PHP 8.1 Use the Upgrade Tool Update CakePHP Dependency Update app files based upon latest app template 5.0 Migration Guide Deprecated Features Removed Breaking Changes Deprecations New Features PHPUnit Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules

Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules Configuration Session Configuration Routing configuration Additional Class Paths Plugin, View Template and Locale Paths Inflection Configuration Configure Class Writing Configuration data Reading Configuration

Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules Create the Article List Template Create the View Action Create the View Template Adding Articles Create Add Template Adding Simple Slug Generation Add Edit Action Create Edit Template Update Validation Rules Configuration Session Configuration Routing configuration Additional Class Paths Plugin, View Template and Locale Paths Inflection Configuration Configure Class Configure Writing Configuration data

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 13 Caching 505 Configuring Cache Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 506 Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620 Creating Log Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 620 Log the view could use model data to render an HTML view template containing it, or a XML formatted result for others to consume: // In a view template file, we'll render an 'element' for each user.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 465 13 Caching 633 Configuring Cache Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 634 Writing the view could use model data to render an HTML view template containing it, or a XML formatted result for others to consume: // In a view template file, we'll render an 'element' for each user. template files are named after the controller functions they display, in an underscored form. The viewAll() function of the ArticlesController class will look for a view template in src/Template/Articles/view_all

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 421 13 Caching 605 Configuring Cache Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 606 Writing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 728 Creating Log Engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 728 Log the view could use model data to render an HTML view template containing it, or a XML formatted result for others to consume: // In a view template file, we'll render an 'element' for each user.

Overview Writing more views Write views that actually do something Raising a 404 error Use the template system Removing hardcoded URLs in templates Namespacing URL names Writing your first Django app Django Form classes Working with form templates Further topics Templates Support for template engines The Django template language Class-based views Introduction to class-based views Built-in class-based Installation Usage Django’s cache framework Setting up the cache The per-site cache The per-view cache Template fragment caching The low-level cache API Downstream caches Using Vary headers Controlling cache: