From a2062b2ec252bb8be9337a6d5b384c8cdda4463d Mon Sep 17 00:00:00 2001 From: Michael Hudson-Doyle Date: Wed, 13 Mar 2019 15:55:30 +1300 Subject: [PATCH] round result of (highest as f64).log(2.0) 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. --- vendor/typenum/build/main.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git rustc-1.36.0-src/vendor/typenum/build/main.rs rustc-1.36.0-src/vendor/typenum/build/main.rs index 9c9f237cd..153031a2f 100644 --- rustc-1.36.0-src/vendor/typenum/build/main.rs +++ rustc-1.36.0-src/vendor/typenum/build/main.rs @@ -77,7 +77,7 @@ pub fn no_std() {} fn main() { let highest: u64 = 1024; - let first2: u32 = (highest as f64).log(2.0) as u32 + 1; + let first2: u32 = (highest as f64).log(2.0).round() as u32 + 1; let first10: u32 = (highest as f64).log(10.0) as u32 + 1; let uints = (0..(highest + 1)) .chain((first2..64).map(|i| 2u64.pow(i))) -- 2.22.0