Random#rand with Range(Float32, Float32) doesn't work

[Heaven31415]

Random#rand method with Range(Float, Float) overload is returning Float64, which makes it impossible to use it with Range(Float32, Float32) argument.

random = Random.new

random.rand(1..10) # ok
random.rand(1u8..10u8) # ok

random.rand(1.0..10.0) # ok
random.rand(1.0f32..10.0f32) # error: type must be Float64, not Float32

I don't know whether there is a reason, but this overload should probably return Float instead of Float64, as in the case of Range(Int, Int) overload.

Any idea how to work around this, beside casting to Float64 and then back to Float32 after generating random number?

Ubuntu 18.04, Crystal 0.25.1 [b782738] (2018-06-27)

[straight-shoota]

Yeah, it's just the return type is to restrictive, it should be Float not Float64.
Until this is fixed, you can just reopen the class in your code and override the method.

[Heaven31415]

Thanks.