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From 0d5196feadafa77c727f517d747ffcf3fd0e8ba9 Mon Sep 17 00:00:00 2001 |
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From: Michael Hudson-Doyle <michael.hudson@canonical.com> |
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Date: Wed, 13 Mar 2019 15:55:30 +1300 |
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Subject: [PATCH] round result of (highest as f64).log(2.0) |
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Even though (1024f64).log(2.0) has an exact, representable, value, with rustc 1.32 on i386 it comes out as +9.999999999999999985 with optimization enabled. And the rustc doesn't like having two defintions for U1024 etc. |
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--- |
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build/main.rs | 2 +- |
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1 file changed, 1 insertion(+), 1 deletion(-) |
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|
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diff --git a/build/main.rs b/build/main.rs |
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index 16b0ffe2f..b7939f993 100644 |
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--- a/vendor/typenum/build/main.rs |
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+++ b/vendor/typenum/build/main.rs |
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@@ -81,7 +81,7 @@ pub fn no_std() {} |
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fn main() { |
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let highest: u64 = 1024; |
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|
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- let first2: u32 = (highest as f64).log(2.0) as u32 + 1; |
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+ let first2: u32 = (highest as f64).log(2.0).round() as u32 + 1; |
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let first10: u32 = (highest as f64).log(10.0) as u32 + 1; |
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let uints = (0..(highest + 1)) |
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.chain((first2..64).map(|i| 2u64.pow(i))) |
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