Parsing result of numbers depends on `allownan`

[hhaensel]

When allownan = true all numbers are parsed as Float64

julia> JSON.parse("1")
1

julia> JSON.parse("1", allownan = true)
1.0

julia> JSON.parse("""[1,2,3]""")
3-element Vector{Any}:
 1
 2
 3

julia> JSON.parse("""[1,2,3]""", allownan=true)
3-element Vector{Any}:
 1.0
 2.0
 3.0

[hhaensel]

@quinnj are you planning to address this issue? Should I have a look myself?

[quinnj]

This currently is working as designed. There is no explicit control over forcing numbers to be parsed as int/float, but with allownan, it is currently assumed that since you'll be encountering IEEE values (NaN, Inf) that we'll just parse everything as Float64. If you have a specific use-case that requires otherwise, please provide a detailed walk-through/example and we can consider our options.