core: add abs to num.

graydon · graydon · commit 73280b0472af · 2013-02-13T11:46:25.000-08:00
diff --git a/src/libcore/num/num.rs b/src/libcore/num/num.rs
@@ -39,6 +39,10 @@ pub trait One {
     static pure fn one() -> Self;
 }
 
+pub pure fn abs<T: cmp::Ord Num Zero>(v: T) -> T {
+    if v < Zero::zero() { v.neg() } else { v }
+}
+
 pub trait Round {
     pure fn round(&self, mode: RoundMode) -> Self;
 

Original file line number	Diff line number	Diff line change
`@@ -39,6 +39,10 @@ pub trait One {`
`39`	`39`	`static pure fn one() -> Self;`
`40`	`40`	`}`
`41`	`41`
	`42`	`+pub pure fn abs<T: cmp::Ord Num Zero>(v: T) -> T {`
	`43`	`+ if v < Zero::zero() { v.neg() } else { v }`
	`44`	`+}`
	`45`	`+`
`42`	`46`	`pub trait Round {`
`43`	`47`	`pure fn round(&self, mode: RoundMode) -> Self;`
`44`	`48`