diff options
Diffstat (limited to 'src/test/ui/typeck/issue-52082-type-param-shadows-existing-type.rs')
-rw-r--r-- | src/test/ui/typeck/issue-52082-type-param-shadows-existing-type.rs | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/test/ui/typeck/issue-52082-type-param-shadows-existing-type.rs b/src/test/ui/typeck/issue-52082-type-param-shadows-existing-type.rs new file mode 100644 index 000000000..7bf151514 --- /dev/null +++ b/src/test/ui/typeck/issue-52082-type-param-shadows-existing-type.rs @@ -0,0 +1,54 @@ +// Fix issue 52082: Confusing error if accidentally defining a type parameter with the same name as +// an existing type +// +// To this end, make sure that when trying to retrieve a field of a (reference to) type parameter, +// rustc points to the point where the parameter was defined. +#[derive(Debug)] +struct Point +{ + x: i32, + y: i32 +} + +impl Point +{ + fn add(a: &Point, b: &Point) -> Point + { + Point {x: a.x + b.x, y: a.y + b.y} + } +} + +trait Eq +{ + fn equals_ref<T>(a: &T, b: &T) -> bool; + fn equals_val<T>(a: T, b: T) -> bool; +} + +impl Eq for Point +{ + fn equals_ref<Point>(a: &Point, b: &Point) -> bool + { + a.x == b.x && a.y == b.y //~ ERROR no field `x` on type `&Point` [E0609] + //~|ERROR no field `x` on type `&Point` [E0609] + //~|ERROR no field `y` on type `&Point` [E0609] + //~|ERROR no field `y` on type `&Point` [E0609] + } + + fn equals_val<Point>(a: Point, b: Point) -> bool + { + a.x == b.x && a.y == b.y //~ ERROR no field `x` on type `Point` [E0609] + //~|ERROR no field `x` on type `Point` [E0609] + //~|ERROR no field `y` on type `Point` [E0609] + //~|ERROR no field `y` on type `Point` [E0609] + } +} + +fn main() +{ + let p1 = Point {x: 0, y: 10}; + let p2 = Point {x: 20, y: 42}; + println!("{:?}", Point::add(&p1, &p2)); + println!("p1: {:?}, p2: {:?}", p1, p2); + println!("&p1 == &p2: {:?}", Point::equals_ref(&p1, &p2)); + println!("p1 == p2: {:?}", Point::equals_val(p1, p2)); +} |