SWIFT-325 BSON init int64 inconsistency. (Not a bug)

[icyield]

When initing a BSON from a literal it is an int64 by default, but is easy to change (.int32(5)). However when using JSON the "default" type is int32.

Is there a method to force JSON to give int64 as the default type for small value ints?

We have

/// Initialize a BSON from an integer. On 64-bit systems, this will result in an .int64. On 32-bit systems,
/// this will result in an .int32.
public init(integerLiteral value: Int) {
self.init(value)
}

But for JSON we have
// Spec requires that we try int32, try int64, then try double for decoding numbers
if let int32 = try Int32(fromExtJSON: json, keyPath: keyPath) {
self = int32.bson
return
}

[isabelatkinson]

Hi @icyield - unfortunately the extended JSON spec requires us to try to fit numeric values into the smallest type possible (see here), so we cannot default numbers to 64-bit integers. If you'd like to force your JSON to decode numbers to 64-bit integers, one option is to decode to a struct that contains Int64s. Otherwise, you may need to update your fields manually.

SWIFT-325 covers adding number encoding/decoding strategies, and I've added a comment for us to consider adding strategies such as the one you've requested to our ExtendedJSONDecoder as well. Feel free to follow that ticket for updates on this work.