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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/issues/issue-3979-generics.rs | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/test/ui/issues/issue-3979-generics.rs b/src/test/ui/issues/issue-3979-generics.rs new file mode 100644 index 000000000..519de1cad --- /dev/null +++ b/src/test/ui/issues/issue-3979-generics.rs @@ -0,0 +1,36 @@ +// run-pass +#![allow(dead_code)] +#![allow(non_snake_case)] + +use std::ops::Add; + +trait Positioned<S> { + fn SetX(&mut self, _: S); + fn X(&self) -> S; +} + +trait Movable<S: Add<Output=S>>: Positioned<S> { + fn translate(&mut self, dx: S) { + let x = self.X() + dx; + self.SetX(x); + } +} + +struct Point { x: isize, y: isize } + +impl Positioned<isize> for Point { + fn SetX(&mut self, x: isize) { + self.x = x; + } + fn X(&self) -> isize { + self.x + } +} + +impl Movable<isize> for Point {} + +pub fn main() { + let mut p = Point{ x: 1, y: 2}; + p.translate(3); + assert_eq!(p.X(), 4); +} |