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Centril/const_let_run_pass.rs

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