encoding/json: custom json (un)marshalling #5882
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Neirokan
reviewed
Nov 6, 2025
| User_Marshaller :: #type proc(w: io.Writer, v: any) -> Marshal_Error | ||
| User_Marshaller_Map :: map[typeid]User_Marshaller | ||
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| marshal :: proc(v: any, opt: Marshal_Options = {}, user_marshallers: User_Marshaller_Map = nil, allocator := context.allocator, loc := #caller_location) -> (data: []byte, err: Marshal_Error) { |
Contributor
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It's probably better to place user_marshallers inside Marshal_Options.
Neirokan
reviewed
Nov 6, 2025
| } | ||
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| marshal :: proc(v: any, opt: Marshal_Options = {}, allocator := context.allocator, loc := #caller_location) -> (data: []byte, err: Marshal_Error) { | ||
| User_Marshaller :: #type proc(w: io.Writer, v: any) -> Marshal_Error |
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I think that User_Marshaller needs ^Marshaller_Options too. If marshaller produces a json object, then there should be a way to respect all those options.
Also makes it possible to just call json.marshal_to_writer(w, transformed_data, opt)
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Closes #4257
This allows passing an optional map of
typeidtoUser_Marshaller/User_Unmarshallertojson.marshal()andjson.unmarshal()respectively.I will admit I primarily focused on making this work for my usecase and hadn't considered much else. Let me know if I missed something or if something needs changing.