When I am developing packages, I often come across the following problem. struct Step{T} end func(::Step{1}, x) = do something... func(::Step{2}, x) = do some different things... I am not sure should I use singleton types Type{Step{1}} and Type{Step{2}}, instead of singletons Step{1} and Step{2} …

Often the context suggests a preferred method: eg if the type is a container but is meaningful for some method without its contents (eg convert), or the contents are not relevant for some kind of information (Base.IteratorSize), or no value is available at some point (eg you are just creating an ins…

Should I dispatch on singleton types or their instances?

General Usage

rdeits August 30, 2019, 12:30pm 6

2 Likes

Topic		Replies	Views
Singleton types vs. instances as type parameters General Usage	10	3645	March 22, 2017
Best practices for type dispatch? General Usage	3	1185	April 11, 2017
Naming of singleton types and their instance General Usage question	10	2429	January 17, 2018
What is the diffence between abstract type and singleton type General Usage question , type	4	542	February 8, 2023
Trait definitions: type level vs instance level General Usage	3	460	September 7, 2023

Should I dispatch on singleton types or their instances?

Related topics