From: Mara Bos <m-ou.se@m-ou.se>
Date: Tue, 26 Nov 2019 09:47:52 +0000 (+0100)
Subject: Add core::{f32,f64}::consts::TAU.
X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=fd9b986bfe47f2d4666216a35edf66981b923ac9;p=rust.git

Add core::{f32,f64}::consts::TAU.
---

diff --git a/src/libcore/num/f32.rs b/src/libcore/num/f32.rs
index 7662bba6b5e..896ba96d197 100644
--- a/src/libcore/num/f32.rs
+++ b/src/libcore/num/f32.rs
@@ -75,6 +75,12 @@ pub mod consts {
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const PI: f32 = 3.14159265358979323846264338327950288_f32;
 
+    /// The full circle constant (τ)
+    ///
+    /// Equal to 2π.
+    #[unstable(feature = "tau_constant", issue = "0")]
+    pub const TAU: f32 = 6.28318530717958647692528676655900577_f32;
+
     /// π/2
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const FRAC_PI_2: f32 = 1.57079632679489661923132169163975144_f32;
diff --git a/src/libcore/num/f64.rs b/src/libcore/num/f64.rs
index 4a2a35dfb09..6f1af2cbb81 100644
--- a/src/libcore/num/f64.rs
+++ b/src/libcore/num/f64.rs
@@ -75,6 +75,12 @@ pub mod consts {
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const PI: f64 = 3.14159265358979323846264338327950288_f64;
 
+    /// The full circle constant (τ)
+    ///
+    /// Equal to 2π.
+    #[unstable(feature = "tau_constant", issue = "0")]
+    pub const TAU: f64 = 6.28318530717958647692528676655900577_f64;
+
     /// π/2
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const FRAC_PI_2: f64 = 1.57079632679489661923132169163975144_f64;