Sometimes I would find it useful to have access to the default values of keyword arguments of a function. I wrote this macro to achieve this for functions that I defined myself: julia> macro kwvalues(func) @eval $func …

[image] jbrea: is there maybe even a way to achieve the same without a macro? When I use defaults in multiple places, I usually define them as constants, eg const DEFAULT_PAGESIZE = 50 process_page(output; pagesize = DEFAULT_PAGESIZE, ...) = ...

Impressive macro, and a cool idea, hadn’t thought of that before! That said, I tend to be reluctant to use macros for things like this. I feel like it often reduces flexibility and readability (people not familiar with your package will have no idea what @kwvalues is, so now you’ve introduced a bar…

Thanks for the feedback @Tamas_Papp & @bennedich ! I would also use constants to use defaults at multiple places. The use case I had in mind was rather something that could be done with parameter structures (the way I would do in in C), e.g. using Parameters @with_kw struct ParamsF a::Int = 2 …

You can also define those defaultkwvalues as a const NamedTuple, or just a function that returns them (which you can later modify then).

Retrieve default values of keyword arguments

General Usage

NicoD August 23, 2024, 1:58pm 6

If you still need it, I answered a similar discourse question without using a macro.

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Retrieve default values of keyword arguments

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