1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

use crate::{consts::ConstIndex, types::Vector};
use core::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Sub, SubAssign};

// reference operations
// need to have the Output = T on the Add for &T, otherwise you get infinite recursion

// im not good with macro hygene, but foring the size to be called N and the type to be called T
// seems wrong to me and like its breaking hygene..
macro_rules! impl_op {
	( $op:tt, $fn:ident, $basetype:ty, $( $generics:tt),  *; $( $cons:tt $constype:ty ), * ) => {
		impl<'a, 'b, $( $generics), *, B: 'b, $( const $cons : $constype), *> $op <B> for $basetype
                where
                        &'a T: $op<&'b T, Output = T>,
                        B: ConstIndex<&'b T, N> + Copy + Clone,
                        T: 'a + 'b,
                {
                        type Output = Vector<T, N>;
                        default fn $fn(self, other: B) -> Vector<T, N> {
                                self.into_iter()
                                        .enumerate()
                                        .map(|(i, s)| $op::$fn(s, other.i(i)))
                                        .collect()
                        }
                }
	};
}

macro_rules! maths {
	( $basetype:ty, $( $generics:tt), *; $( const $cons:tt : $constype:ty ), * ) => {
            impl_op!(Add, add, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_op!(Sub, sub, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_op!(Mul, mul, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_op!(Div, div, $basetype, $( $generics),  *; $( $cons $constype ), * );
	};
}

// assigning operations
macro_rules! impl_assign_op {
	( $op:tt, $fn:ident, $basetype:ty, $( $generics:tt),  *; $( $cons:tt $constype:ty ), * ) => {
		impl<'a, $( $generics), *, $( const $cons : $constype), *> $op <&'a $basetype> for $basetype
		where
			T: $op<&'a T>,
		{
			fn $fn(&mut self, other: &'a $basetype) {
				let iter = self.inner.iter_mut().zip(other);
				for (s, o) in iter {
					$op::$fn(s, o);
				}
			}
		}

		impl<'a, 'b, $( $generics), *, B: 'b, $( const $cons : $constype), *> $op <B> for $basetype
                where
                        T: $op<&'b T>,
                        B: ConstIndex<&'b T, N> + Copy + Clone,
                        T: 'a + 'b,
                {
                        default fn $fn(&mut self, other: B) {
                            use crate::consts::ConstIteratorMut;
				let iter  = ConstIteratorMut::from(self);
				for (i, s) in iter.enumerate() {
					$op::$fn(s, other.i(i));
				}
                        }
                }
	};
}

macro_rules! assign_maths {
	( $basetype:ty, $( $generics:tt),  *; $( const $cons:tt : $constype:ty ), * ) => {
            impl_assign_op!(AddAssign, add_assign, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_assign_op!(SubAssign, sub_assign, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_assign_op!(MulAssign, mul_assign, $basetype, $( $generics),  *; $( $cons $constype ), * );
            impl_assign_op!(DivAssign, div_assign, $basetype, $( $generics),  *; $( $cons $constype ), * );
        }
}

maths!(&'a Vector<T, N>, T; const N: usize);

use crate::VectorView;
maths!(VectorView<'a, T, N, M>, T; const N: usize, const M: usize);

assign_maths!(Vector<T, N>, T; const N: usize);

#[cfg(test)]
pub(crate) const TESTLEN: usize = 777usize;

#[test]
fn default_is_default() {
	let m = Vector::<f32, TESTLEN>::default();
	for i in 0..TESTLEN {
		assert_eq!(m.inner[i], f32::default());
	}
}

#[test]
fn operations() {
	use rand::{thread_rng, Rng};
	let mut rng = thread_rng();
	let a: Vector<f32, TESTLEN> = rng.gen();
	let b: Vector<f32, TESTLEN> = rng.gen();

	let add = &a + &b;
	let sub = &a - &b;
	let mul = &a * &b;
	let div = &a / &b;

	for i in 0..TESTLEN {
		assert_eq!(a.inner[i] + b.inner[i], add.inner[i]);
		assert_eq!(a.inner[i] - b.inner[i], sub.inner[i]);
		assert_eq!(a.inner[i] * b.inner[i], mul.inner[i]);
		assert_eq!(a.inner[i] / b.inner[i], div.inner[i]);
	}
}

#[test]
fn assignment_operations() {
	use rand::{thread_rng, Rng};
	let mut rng = thread_rng();
	let a: Vector<f32, TESTLEN> = rng.gen();
	let b: Vector<f32, TESTLEN> = rng.gen();

	let mut add = a.clone();
	add += &b;

	let mut sub = a.clone();
	sub -= &b;

	let mut mul = a.clone();
	mul *= &b;

	let mut div = a.clone();
	div /= &b;

	for i in 0..TESTLEN {
		assert_eq!(a.inner[i] + b.inner[i], add.inner[i]);
		assert_eq!(a.inner[i] - b.inner[i], sub.inner[i]);
		assert_eq!(a.inner[i] * b.inner[i], mul.inner[i]);
		assert_eq!(a.inner[i] / b.inner[i], div.inner[i]);
	}
}