Named Optional Parameters - JavaScript Style Brian Davidson (briandavidson@meta.com) Summary C++ developers often run into the situation where we have multiple parameters in a function with the same function arguments forming a clear function call Inspiration: Javascript The anonymous object parameters of javascript provide a readable function API. logger({one:0.9999}); > 0.9999 logger({one:"one"

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################

of the Belgian C++ Users Group (BeCPP) C++204 Agenda  C++23 Core Language  Explicit Object Parameters  if consteval  Multidimensional Subscript Operator  Attributes on Lambda-Expressions  Literal Garbage Collection SupportC++23 Core Language6 Agenda  C++23 Core Language  Explicit Object Parameters  if consteval  Multidimensional Subscript Operator  Attributes on Lambda-Expressions  Literal Containers Heterogeneous Erasure  Removed Features  Garbage Collection Support7 Explicit Object Parameters  Instead of implicit this, explicitly specify the object parameter  Example: class Cell

Basics11 David Olsen – Generic Programming CppCon 2024 Define a Template template parameters> declaration; declaration can be • class / struct • function • type alias • variable • concept Template Parameters Three kinds Type template parameter class|typename identifier Non-type template parameter (NTTP) type|auto identifier Template template parameter template parameters> class|typename Template Parameters Three kinds Type template parameter class|typename identifier Non-type template parameter (NTTP) type|auto identifier Template template parameter template parameters> class|typename

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################

terms of types to-be-specified-later • Algorithms were then instantiated on demand using type parameters • This approach came to be known as generic programming C++ supports generic programming with Back to Basics: Templates – Part 1 Copyright © 2021 Bob Steagall Template Parameters and Template Arguments • Template parameters are the names that come after the template keyword in a template declaration declaration • Template arguments are the concrete items substituted for template parameters to create a template specialization 44 template struct pair { T1 first; T2 second; ...

configuration. See Administering a multi-user conda installation. The .condarc file can change many parameters, including: • Where conda looks for packages. • If and how conda uses a proxy server. • Where allows operations to choose themselves. For more specific # # control, see the other *_threads parameters: * repodata_threads - # # for fetching/loading repodata * verify_threads - for verifying # # package anaconda_upload: # # conda_build (map: primitive) # # aliases: conda-build # # General configuration parameters for conda-build. # # # conda_build: {} # ######################################################