470 lines
10 KiB
Rust
470 lines
10 KiB
Rust
//@ run-pass
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struct Foo<T>(T);
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struct Bar<T> { x: T }
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struct W(u32);
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struct A { a: u32 }
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#[allow(redundant_semicolons)]
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const fn basics((a,): (u32,)) -> u32 {
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// Deferred assignment:
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let b: u32;
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b = a + 1;
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// Immediate assignment:
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let c: u32 = b + 1;
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// Mutables:
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let mut d: u32 = c + 1;
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d = d + 1;
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// +4 so far.
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// No effect statements work:
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; ;
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1;
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// Array projection
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let mut arr: [u32; 1] = [0];
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arr[0] = 1;
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d = d + arr[0];
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// +5
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// Field projection:
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let mut foo: Foo<u32> = Foo(0);
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let mut bar: Bar<u32> = Bar { x: 0 };
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foo.0 = 1;
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bar.x = 1;
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d = d + foo.0 + bar.x;
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// +7
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(0)];
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arr[0].0 = 1;
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d = d + arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 0 }];
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arr[0].x = 1;
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d = d + arr[0].x;
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// +9
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([0]);
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(arr.0)[0] = 1;
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d = d + (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [0] };
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arr.x[0] = 1;
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d = d + arr.x[0];
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// +11
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d
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}
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const fn add_assign(W(a): W) -> u32 {
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// Mutables:
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let mut d: u32 = a + 1;
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d += 1;
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// +2 so far.
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// Array projection
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let mut arr: [u32; 1] = [0];
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arr[0] += 1;
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d += arr[0];
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// +3
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// Field projection:
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let mut foo: Foo<u32> = Foo(0);
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let mut bar: Bar<u32> = Bar { x: 0 };
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foo.0 += 1;
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bar.x += 1;
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d += foo.0 + bar.x;
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// +5
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(0)];
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arr[0].0 += 1;
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d += arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 0 }];
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arr[0].x += 1;
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d += arr[0].x;
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// +7
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([0]);
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(arr.0)[0] += 1;
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d += (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [0] };
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arr.x[0] += 1;
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d += arr.x[0];
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// +9
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d
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}
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const fn mul_assign(A { a }: A) -> u32 {
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// Mutables:
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let mut d: u32 = a + 1;
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d *= 2;
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// 2^1 * (a + 1)
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// Array projection
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let mut arr: [u32; 1] = [1];
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arr[0] *= 2;
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d *= arr[0];
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// 2^2 * (a + 1)
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// Field projection:
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let mut foo: Foo<u32> = Foo(1);
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let mut bar: Bar<u32> = Bar { x: 1 };
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foo.0 *= 2;
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bar.x *= 2;
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d *= foo.0 + bar.x;
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// 2^4 * (a + 1)
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(1)];
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arr[0].0 *= 2;
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d *= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 1 }];
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arr[0].x *= 2;
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d *= arr[0].x;
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// 2^6 * (a + 1)
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([1]);
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(arr.0)[0] *= 2;
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d *= (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [1] };
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arr.x[0] *= 2;
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d *= arr.x[0];
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// 2^8 * (a + 1)
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d
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}
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const fn div_assign(a: [u32; 1]) -> u32 {
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let a = a[0];
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// Mutables:
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let mut d: u32 = 1024 * a;
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d /= 2;
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// 512
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// Array projection
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let mut arr: [u32; 1] = [4];
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arr[0] /= 2;
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d /= arr[0];
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// 256
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// Field projection:
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let mut foo: Foo<u32> = Foo(4);
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let mut bar: Bar<u32> = Bar { x: 4 };
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foo.0 /= 2;
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bar.x /= 2;
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d /= foo.0;
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d /= bar.x;
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// 64
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(4)];
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arr[0].0 /= 2;
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d /= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 4 }];
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arr[0].x /= 2;
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d /= arr[0].x;
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// 16
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([4]);
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(arr.0)[0] /= 2;
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d /= (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [4] };
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arr.x[0] /= 2;
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d /= arr.x[0];
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// 4
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d
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}
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const fn rem_assign(W(a): W) -> u32 {
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// Mutables:
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let mut d: u32 = a;
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d %= 10;
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d += 10;
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// Array projection
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let mut arr: [u32; 1] = [3];
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arr[0] %= 2;
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d %= 9 + arr[0];
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d += 10;
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// Field projection:
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let mut foo: Foo<u32> = Foo(5);
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let mut bar: Bar<u32> = Bar { x: 7 };
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foo.0 %= 2;
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bar.x %= 2;
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d %= 8 + foo.0 + bar.x;
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d += 10;
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(4)];
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arr[0].0 %= 3;
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d %= 9 + arr[0].0;
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d += 10;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 7 }];
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arr[0].x %= 3;
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d %= 9 + arr[0].x;
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d += 10;
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([6]);
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(arr.0)[0] %= 5;
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d %= 9 + (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [11] };
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arr.x[0] %= 5;
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d %= 9 + arr.x[0];
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d
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}
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const fn sub_assign(W(a): W) -> u32 {
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// Mutables:
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let mut d: u32 = a;
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d -= 1;
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// Array projection
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let mut arr: [u32; 1] = [2];
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arr[0] -= 1;
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d -= arr[0];
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// Field projection:
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let mut foo: Foo<u32> = Foo(2);
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let mut bar: Bar<u32> = Bar { x: 2 };
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foo.0 -= 1;
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bar.x -= 1;
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d -= foo.0 + bar.x;
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(2)];
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arr[0].0 -= 1;
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d -= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: 2 }];
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arr[0].x -= 1;
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d -= arr[0].x;
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([2]);
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(arr.0)[0] -= 1;
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d -= (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [2] };
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arr.x[0] -= 1;
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d -= arr.x[0];
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d
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}
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const fn shl_assign(W(a): W) -> u32 {
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// Mutables:
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let mut d: u32 = a;
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d <<= 1; // 10
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// Array projection
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let mut arr: [u32; 1] = [1];
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arr[0] <<= 1;
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d <<= arr[0]; // 10 << 2
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// Field projection:
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let mut foo: Foo<u32> = Foo(1);
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let mut bar: Bar<u32> = Bar { x: 1 };
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foo.0 <<= 1;
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bar.x <<= 1;
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d <<= foo.0 + bar.x; // 1000 << 4
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(1)];
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arr[0].0 <<= 1;
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d <<= arr[0].0; // 1000_0000 << 2
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let mut arr: [Bar<u32>; 1] = [Bar { x: 1 }];
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arr[0].x <<= 1;
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d <<= arr[0].x; // 1000_0000_00 << 2
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([1]);
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(arr.0)[0] <<= 1;
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d <<= (arr.0)[0]; // 1000_0000_0000 << 2
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let mut arr: Bar<[u32; 1]> = Bar { x: [1] };
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arr.x[0] <<= 1;
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d <<= arr.x[0]; // 1000_0000_0000_00 << 2
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d
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}
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const fn shr_assign(W(a): W) -> u32 {
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// Mutables:
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let mut d: u32 = a;
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d >>= 1; // /= 2
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// Array projection
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let mut arr: [u32; 1] = [2];
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arr[0] >>= 1;
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d >>= arr[0]; // /= 4
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// Field projection:
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let mut foo: Foo<u32> = Foo(2);
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let mut bar: Bar<u32> = Bar { x: 2 };
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foo.0 >>= 1;
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bar.x >>= 1;
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d >>= foo.0 + bar.x; // /= 16
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(2)];
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arr[0].0 >>= 1;
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d >>= arr[0].0; // /= 32
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let mut arr: [Bar<u32>; 1] = [Bar { x: 2 }];
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arr[0].x >>= 1;
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d >>= arr[0].x; // /= 64
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([2]);
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(arr.0)[0] >>= 1;
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d >>= (arr.0)[0]; // /= 128
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let mut arr: Bar<[u32; 1]> = Bar { x: [2] };
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arr.x[0] >>= 1;
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d >>= arr.x[0]; // /= 256
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d
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}
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const fn bit_and_assign(W(a): W) -> u32 {
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let f = 0b1111_1111_1111_1111;
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// Mutables:
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let mut d: u32 = a;
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d &= 0b1111_1111_1111_1110;
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// Array projection
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let mut arr: [u32; 1] = [f];
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arr[0] &= 0b1111_1111_1111_1101;
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d &= arr[0];
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// Field projection:
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let mut foo: Foo<u32> = Foo(f);
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let mut bar: Bar<u32> = Bar { x: f };
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foo.0 &= 0b1111_1111_1111_0111;
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bar.x &= 0b1111_1111_1101_1111;
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d &= foo.0 & bar.x;
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(f)];
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arr[0].0 &= 0b1111_1110_1111_1111;
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d &= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: f }];
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arr[0].x &= 0b1111_1101_1111_1111;
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d &= arr[0].x;
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([f]);
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(arr.0)[0] &= 0b1011_1111_1111_1111;
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d &= (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [f] };
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arr.x[0] &= 0b0111_1111_1111_1111;
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d &= arr.x[0];
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d
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}
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const fn bit_or_assign(W(a): W) -> u32 {
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let f = 0b0000_0000_0000_0000;
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// Mutables:
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let mut d: u32 = a;
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d |= 0b0000_0000_0000_0001;
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// Array projection
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let mut arr: [u32; 1] = [f];
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arr[0] |= 0b0000_0000_0000_1001;
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d |= arr[0];
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// Field projection:
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let mut foo: Foo<u32> = Foo(f);
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let mut bar: Bar<u32> = Bar { x: f };
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foo.0 |= 0b0000_0000_0001_0000;
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bar.x |= 0b0000_0000_0100_0000;
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d |= foo.0 | bar.x;
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(f)];
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arr[0].0 |= 0b0000_0001_0000_0000;
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d |= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: f }];
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arr[0].x |= 0b0000_0010_0000_0000;
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d |= arr[0].x;
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([f]);
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(arr.0)[0] |= 0b1000_0000_0000_0000;
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d |= (arr.0)[0]; // /= 128
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let mut arr: Bar<[u32; 1]> = Bar { x: [f] };
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arr.x[0] |= 0b1100_0000_0000_0000;
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d |= arr.x[0]; // /= 256
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d
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}
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const fn bit_xor_assign(W(a): W) -> u32 {
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let f = 0b0000_0000_0000_0000;
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// Mutables:
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let mut d: u32 = a;
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d ^= 0b0000_0000_0000_0001;
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// Array projection
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let mut arr: [u32; 1] = [f];
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arr[0] ^= 0b0000_0000_0000_0010;
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d ^= arr[0];
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// Field projection:
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let mut foo: Foo<u32> = Foo(f);
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let mut bar: Bar<u32> = Bar { x: f };
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foo.0 ^= 0b0000_0000_0001_0000;
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bar.x ^= 0b0000_0000_1000_0000;
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d ^= foo.0 ^ bar.x;
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// Array + Field projection:
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let mut arr: [Foo<u32>; 1] = [Foo(f)];
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arr[0].0 ^= 0b0000_0001_0000_0000;
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d ^= arr[0].0;
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let mut arr: [Bar<u32>; 1] = [Bar { x: f }];
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arr[0].x ^= 0b0000_0010_0000_0000;
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d ^= arr[0].x;
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// Field + Array projection:
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let mut arr: Foo<[u32; 1]> = Foo([f]);
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(arr.0)[0] ^= 0b0100_0000_0000_0000;
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d ^= (arr.0)[0];
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let mut arr: Bar<[u32; 1]> = Bar { x: [f] };
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arr.x[0] ^= 0b1000_0000_0000_0000;
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d ^= arr.x[0];
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d
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}
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macro_rules! test {
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($c:ident, $e:expr, $r:expr) => {
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const $c: u32 = $e;
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assert_eq!($c, $r);
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assert_eq!($e, $r);
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}
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}
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fn main() {
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test!(BASICS, basics((2,)), 13);
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test!(ADD, add_assign(W(1)), 10);
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test!(MUL, mul_assign(A { a: 0 }), 256);
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test!(DIV, div_assign([1]), 4);
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test!(REM, rem_assign(W(5)), 5);
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test!(SUB, sub_assign(W(8)), 0);
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test!(SHL, shl_assign(W(1)), 0b1000_0000_0000_0000);
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test!(SHR, shr_assign(W(256)), 1);
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test!(AND, bit_and_assign(W(0b1011_1111_1111_1111_1111)), 0b0011_1100_1101_0100);
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test!(OR, bit_or_assign(W(0b1011_0000_0000_0000)), 0b1111_0011_0101_1001);
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test!(XOR, bit_xor_assign(W(0b0000_0000_0000_0000)), 0b1100_0011_1001_0011);
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}
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