From 3474610fbc81f7e9f3f2cb23dc1554b3f5cec657 Mon Sep 17 00:00:00 2001 From: "Jeff R. Allen" Date: Tue, 24 May 2016 23:00:06 +0600 Subject: [PATCH] math/rand: Doc fix for how many bits Seed uses Document the fact that the default Source uses only the bottom 31 bits of the given seed. Fixes #15788 Change-Id: If20d1ec44a55c793a4a0a388f84b9392c2102bd1 Reviewed-on: https://go-review.googlesource.com/23352 Reviewed-by: Ian Lance Taylor Run-TryBot: Ian Lance Taylor TryBot-Result: Gobot Gobot --- src/math/rand/rand.go | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/math/rand/rand.go b/src/math/rand/rand.go index d693bfb52f..add039ed4b 100644 --- a/src/math/rand/rand.go +++ b/src/math/rand/rand.go @@ -179,7 +179,8 @@ var globalRand = New(&lockedSource{src: NewSource(1)}) // Seed uses the provided seed value to initialize the default Source to a // deterministic state. If Seed is not called, the generator behaves as -// if seeded by Seed(1). +// if seeded by Seed(1). Only uses the bottom 31 bits of seed; the top 33 +// bits are ignored. func Seed(seed int64) { globalRand.Seed(seed) } // Int63 returns a non-negative pseudo-random 63-bit integer as an int64 -- 2.50.0