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nim-json-serialization
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extend automatic serialization support for `distinct` in Nim 2 (#93) 

In Nim 2, `distinct` values no longer match `value is object` but need
to be checked separately with `value is distinct`. The underlying type
can be unwrapped with `distinctBase` to inspect whether this is a value
of type `distinct object` or `distinct` something-else.
This commit is contained in:
Etan Kissling 2024-07-03 16:11:05 +02:00 committed by GitHub
parent 9cf79c034c
commit 89f7be1783
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1 changed files with 5 additions and 2 deletions
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7
json_serialization/writer.nim
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@ -353,7 +353,7 @@ proc writeValue*(w: var JsonWriter, value: auto) {.gcsafe, raises: [IOError].} =
elif value is (seq or array or openArray): elif value is (seq or array or openArray):
w.writeArray(value) w.writeArray(value)
elif value is (object or tuple): elif value is (distinct or object or tuple):
mixin flavorUsesAutomaticObjectSerialization mixin flavorUsesAutomaticObjectSerialization
type Flavor = JsonWriter.Flavor type Flavor = JsonWriter.Flavor
@ -364,7 +364,10 @@ proc writeValue*(w: var JsonWriter, value: auto) {.gcsafe, raises: [IOError].} =
const typeName = typetraits.name(type value) const typeName = typetraits.name(type value)
{.error: "Please override writeValue for the " & typeName & " type (or import the module where the override is provided)".} {.error: "Please override writeValue for the " & typeName & " type (or import the module where the override is provided)".}
writeRecordValue(w, value) when value is distinct:
writeRecordValue(w, distinctBase(value, recursive = false))
else:
writeRecordValue(w, value)
else: else:
const typeName = typetraits.name(value.type) const typeName = typetraits.name(value.type)
{.fatal: "Failed to convert to JSON an unsupported type: " & typeName.} {.fatal: "Failed to convert to JSON an unsupported type: " & typeName.}