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Document custom serialization #298

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twavv opened this issue Jan 5, 2020 · 0 comments · Fixed by #302
Closed

Document custom serialization #298

twavv opened this issue Jan 5, 2020 · 0 comments · Fixed by #302

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@twavv
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twavv commented Jan 5, 2020

There's not very much documentation around the custom serialization API and it took a bit of hunting around in the code to figure out how to make something work.

using JSON

struct MySerialization <: JSON.CommonSerialization end

# Define specific method for Missing
JSON.show_json(io::JSON.StructuralContext, s::MySerialization, x::Missing) =
    JSON.show_json(io, s, "~missing~")

myjson(x) = sprint(JSON.show_json, MySerialization(), x)
println(myjson(Dict("foo" => missing)))
# {"foo":"~missing~"}
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