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Contents
extern crate num;
use num::Num;
pub struct Triangle<T> {
sides: [T; 3],
}
impl<T: Num + PartialOrd + PartialEq + Copy> Triangle<T> {
#[cfg_attr(rustfmt, rustfmt_skip)]
fn valid_sides(&self) -> bool {
let z = self.sides[0] - self.sides[0];
(self.sides.iter().all(|&s| s > z)) &&
(self.sides[0] + self.sides[1] >= self.sides[2]) &&
(self.sides[1] + self.sides[2] >= self.sides[0]) &&
(self.sides[2] + self.sides[0] >= self.sides[1])
}
pub fn build(sides: [T; 3]) -> Result<Self, ()> {
let t = Triangle { sides: sides };
if t.valid_sides() {
Ok(t)
} else {
Err(())
}
}
pub fn is_equilateral(&self) -> bool {
let a = self.sides[0];
let b = self.sides[1];
let c = self.sides[2];
a == b && b == c
}
pub fn is_isosceles(&self) -> bool {
let a = self.sides[0];
let b = self.sides[1];
let c = self.sides[2];
(a == b && a != c) || (a == c && a != b) || (b == c && a != b)
}
pub fn is_scalene(&self) -> bool {
let a = self.sides[0];
let b = self.sides[1];
let c = self.sides[2];
a != b && a != c && b != c
}
}
Version data entries
396 entries across 396 versions & 1 rubygems