Hi Kelvin,
Can you give a bit more detail on the type of the sequence, and which compiler
version you’re seeing this on?
I can’t reproduce this with a recent Xcode or a recent master toolchain with
this code:
let sequence = 0..<10
let n = 5
let f = { $0*2 }
sequence.prefix(n).map(f)
Thanks
Ben
> On Jan 11, 2018, at 19:11, Kelvin Ma via swift-dev <[email protected]>
> wrote:
>
> when I write sequence.prefix(n).map(f) the compiler complains that .prefix is
> ambiguous. If I replace it with [..<n] it works fine. Why is this happening?
> I found SR-1856 <https://bugs.swift.org/browse/SR-1856> which looks like a
> similar issue but it’s marked fixed.
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