languages/rust
languages/rust
1
0
Fork 0
mirror of https://github.com/rust-lang/rust synced 2024-09-15 22:50:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

book: make Builder Pattern example more complete

Browse source
This commit is contained in:
Tshepang Lekhonkhobe 2015-03-27 01:30:09 +02:00
parent 6cf3b0b74a
commit 1026b06442
1 changed files with 16 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
src/doc/trpl/method-syntax.md
View file

@ -181,17 +181,23 @@ impl Circle {
}
struct CircleBuilder {
coordinate: f64,
x: f64,
y: f64,
radius: f64,
}
impl CircleBuilder {
fn new() -> CircleBuilder {
CircleBuilder { coordinate: 0.0, radius: 0.0, }
CircleBuilder { x: 0.0, y: 0.0, radius: 0.0, }
}
fn coordinate(&mut self, coordinate: f64) -> &mut CircleBuilder {
self.coordinate = coordinate;
fn x(&mut self, coordinate: f64) -> &mut CircleBuilder {
self.x = coordinate;
self
}
fn y(&mut self, coordinate: f64) -> &mut CircleBuilder {
self.x = coordinate;
self
}
@ -201,18 +207,20 @@ impl CircleBuilder {
}
fn finalize(&self) -> Circle {
Circle { x: self.coordinate, y: self.coordinate, radius: self.radius }
Circle { x: self.x, y: self.y, radius: self.radius }
}
}
fn main() {
let c = CircleBuilder::new()
.coordinate(10.0)
.radius(5.0)
.x(1.0)
.y(2.0)
.radius(2.0)
.finalize();
println!("area: {}", c.area());
println!("x: {}", c.x);
println!("y: {}", c.y);
}
```