Test float assign ops

Author: oli-obk

src/test/ui/consts/const_let_eq_float.rs

@@ -0,0 +1,279 @@
+// compile-pass
+
+#![feature(const_let, const_fn)]
+
+struct Foo<T>(T);
+struct Bar<T> { x: T }
+struct W(f32);
+struct A { a: f32 }
+
+const fn basics((a,): (f32,)) -> f32 {
+    // Deferred assignment:
+    let b: f32;
+    b = a + 1.0;
+
+    // Immediate assignment:
+    let c: f32 = b + 1.0;
+
+    // Mutables:
+    let mut d: f32 = c + 1.0;
+    d = d + 1.0;
+    // +4 so far.
+
+    // No effect statements work:
+    ; ;
+    1;
+
+    // Array projection
+    let mut arr: [f32; 1] = [0.0];
+    arr[0] = 1.0;
+    d = d + arr[0];
+    // +5
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(0.0);
+    let mut bar: Bar<f32> = Bar { x: 0.0 };
+    foo.0 = 1.0;
+    bar.x = 1.0;
+    d = d + foo.0 + bar.x;
+    // +7
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(0.0)];
+    arr[0].0 = 1.0;
+    d = d + arr[0].0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 0.0 }];
+    arr[0].x = 1.0;
+    d = d + arr[0].x;
+    // +9
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([0.0]);
+    (arr.0)[0] = 1.0;
+    d = d + (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [0.0] };
+    arr.x[0] = 1.0;
+    d = d + arr.x[0];
+    // +11
+
+    d
+}
+
+const fn add_assign(W(a): W) -> f32 {
+    // Mutables:
+    let mut d: f32 = a + 1.0;
+    d += 1.0;
+    // +2 so far.
+
+    // Array projection
+    let mut arr: [f32; 1] = [0.0];
+    arr[0] += 1.0;
+    d += arr[0];
+    // +3
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(0.0);
+    let mut bar: Bar<f32> = Bar { x: 0.0 };
+    foo.0 += 1.0;
+    bar.x += 1.0;
+    d += foo.0 + bar.x;
+    // +5
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(0.0)];
+    arr[0].0 += 1.0;
+    d += arr[0].0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 0.0 }];
+    arr[0].x += 1.0;
+    d += arr[0].x;
+    // +7
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([0.0]);
+    (arr.0)[0] += 1.0;
+    d += (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [0.0] };
+    arr.x[0] += 1.0;
+    d += arr.x[0];
+    // +9
+
+    d
+}
+
+const fn mul_assign(A { a }: A) -> f32 {
+    // Mutables:
+    let mut d: f32 = a + 1.0;
+    d *= 2.0;
+    // 2^1 * (a + 1)
+
+    // Array projection
+    let mut arr: [f32; 1] = [1.0];
+    arr[0] *= 2.0;
+    d *= arr[0];
+    // 2^2 * (a + 1)
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(1.0);
+    let mut bar: Bar<f32> = Bar { x: 1.0 };
+    foo.0 *= 2.0;
+    bar.x *= 2.0;
+    d *= foo.0 + bar.x;
+    // 2^4 * (a + 1)
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(1.0)];
+    arr[0].0 *= 2.0;
+    d *= arr[0].0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 1.0 }];
+    arr[0].x *= 2.0;
+    d *= arr[0].x;
+    // 2^6 * (a + 1)
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([1.0]);
+    (arr.0)[0] *= 2.0;
+    d *= (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [1.0] };
+    arr.x[0] *= 2.0;
+    d *= arr.x[0];
+    // 2^8 * (a + 1)
+
+    d
+}
+
+const fn div_assign(a: [f32; 1]) -> f32 {
+    let a = a[0];
+    // Mutables:
+    let mut d: f32 = 1024.0 * a;
+    d /= 2.0;
+    // 512
+
+    // Array projection
+    let mut arr: [f32; 1] = [4.0];
+    arr[0] /= 2.0;
+    d /= arr[0];
+    // 256
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(4.0);
+    let mut bar: Bar<f32> = Bar { x: 4.0 };
+    foo.0 /= 2.0;
+    bar.x /= 2.0;
+    d /= foo.0;
+    d /= bar.x;
+    // 64
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(4.0)];
+    arr[0].0 /= 2.0;
+    d /= arr[0].0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 4.0 }];
+    arr[0].x /= 2.0;
+    d /= arr[0].x;
+    // 16
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([4.0]);
+    (arr.0)[0] /= 2.0;
+    d /= (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [4.0] };
+    arr.x[0] /= 2.0;
+    d /= arr.x[0];
+    // 4
+
+    d
+}
+
+const fn rem_assign(W(a): W) -> f32 {
+    // Mutables:
+    let mut d: f32 = a;
+    d %= 10.0;
+    d += 10.0;
+
+    // Array projection
+    let mut arr: [f32; 1] = [3.0];
+    arr[0] %= 2.0;
+    d %= 9.0 + arr[0];
+    d += 10.0;
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(5.0);
+    let mut bar: Bar<f32> = Bar { x: 7.0 };
+    foo.0 %= 2.0;
+    bar.x %= 2.0;
+    d %= 8.0 + foo.0 + bar.x;
+    d += 10.0;
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(4.0)];
+    arr[0].0 %= 3.0;
+    d %= 9.0 + arr[0].0;
+    d += 10.0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 7.0 }];
+    arr[0].x %= 3.0;
+    d %= 9.0 + arr[0].x;
+    d += 10.0;
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([6.0]);
+    (arr.0)[0] %= 5.0;
+    d %= 9.0 + (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [11.0] };
+    arr.x[0] %= 5.0;
+    d %= 9.0 + arr.x[0];
+
+    d
+}
+
+const fn sub_assign(W(a): W) -> f32 {
+    // Mutables:
+    let mut d: f32 = a;
+    d -= 1.0;
+
+    // Array projection
+    let mut arr: [f32; 1] = [2.0];
+    arr[0] -= 1.0;
+    d -= arr[0];
+
+    // Field projection:
+    let mut foo: Foo<f32> = Foo(2.0);
+    let mut bar: Bar<f32> = Bar { x: 2.0 };
+    foo.0 -= 1.0;
+    bar.x -= 1.0;
+    d -= foo.0 + bar.x;
+
+    // Array + Field projection:
+    let mut arr: [Foo<f32>; 1] = [Foo(2.0)];
+    arr[0].0 -= 1.0;
+    d -= arr[0].0;
+    let mut arr: [Bar<f32>; 1] = [Bar { x: 2.0 }];
+    arr[0].x -= 1.0;
+    d -= arr[0].x;
+
+    // Field + Array projection:
+    let mut arr: Foo<[f32; 1]> = Foo([2.0]);
+    (arr.0)[0] -= 1.0;
+    d -= (arr.0)[0];
+    let mut arr: Bar<[f32; 1]> = Bar { x: [2.0] };
+    arr.x[0] -= 1.0;
+    d -= arr.x[0];
+
+    d
+}
+
+macro_rules! test {
+    ($c:ident, $e:expr, $r:expr) => {
+        const $c: f32 = $e;
+        assert_eq!($c, $r);
+        assert_eq!($e, $r);
+    }
+}
+
+fn main() {
+    test!(BASICS, basics((2.0,)), 13.0);
+    test!(ADD, add_assign(W(1.0)), 10.0);
+    test!(MUL, mul_assign(A { a: 0.0 }), 256.0);
+    test!(DIV, div_assign([1.0]), 4.0);
+    test!(REM, rem_assign(W(5.0)), 5.0);
+    test!(SUB, sub_assign(W(8.0)), 0.0);
+}