Is there a way to check if a NamedTuple has a field :a that is elided by the compiler? For example, let t=(a=1, b=2). Then the fact that t has fields :a,:b is known at compile time (because this info is in the type of t): julia> typeof(t) NamedTuple{(:a, :b),Tuple{Int64,Int64}} However both haskey…

[image] e3c6: This seems like a compiler bug? Should someone raise an issue? It is not a bug. But there is an issue open about it Constant propagation for tuple in operator only works for first element · Issue #28844 · JuliaLang/julia · GitHub . Also, the problem is not only with in but with p…

Zero-cost way to check if `NamedTuple` has a field?

General Usage

carstenbauer May 28, 2019, 10:23am 3

Topic		Replies	Views
`hasfield` and `getkey` in namedtuple General Usage question , syntax , base	5	147	September 25, 2025
Constant propagation with a namedtuple with one field General Usage	6	178	November 1, 2024
Is the first key of a NamedTuple special? General Usage	3	539	February 27, 2019
Slowness of fieldnames and propertynames Internals & Design	5	1123	March 10, 2021
Julia NaN check for NamedTuple General Usage nan , namedtuple	4	285	August 8, 2023

Zero-cost way to check if `NamedTuple` has a field?

Related topics