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-rw-r--r--tests/ui/consts/const_let_eq.rs469
1 files changed, 469 insertions, 0 deletions
diff --git a/tests/ui/consts/const_let_eq.rs b/tests/ui/consts/const_let_eq.rs
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+++ b/tests/ui/consts/const_let_eq.rs
@@ -0,0 +1,469 @@
+// run-pass
+
+struct Foo<T>(T);
+struct Bar<T> { x: T }
+struct W(u32);
+struct A { a: u32 }
+
+#[allow(redundant_semicolons)]
+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 {
+ let a = a[0];
+ // 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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