On Thursday, 8 March 2018 00:02:58 UTC+1, Ian Lance Taylor wrote: > > > If we ignore the type context, then > > var v int64 = 1 << s > > fails on 32-bit systems if s > 31 (because 1 is assigned type int, > which is 32 bits, and the shifting a 32-bit value by more than 31 bits > gives you zero). > > If we don't ignore the type context, then in > > var v float32 = 1 << s > > fails because we can't shift a float32. > > Thanks! This explanation is very clear. The spec already contains an example of this rule: var k = uint64(1<<s). Maybe it would be good to add di...'s example as an illegal shift example too?

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