float64 conversion: invalid operation #1316
Description
package main
func exp2(x uint64) float64 {
// valid operations
e := uint64(1) << x
return float64(e)
f := uint64(1 << x)
return float64(f)
return float64(uint64(1 << x))
// 11: invalid operation: 1 << x (shift of type float64)
return float64(uint64(1) << x)
}
The two sets of operations should be equivalent. The first set of operations is
accepted, the second is improperly rejected.
hg id d3e867d23e3e+ tip, 6g, linux, amd64.