[rustc.git] / src / test / ui / typeck / assign-non-lval-mut-ref.stderr

error[E0070]: invalid left-hand side of assignment
  --> $DIR/assign-non-lval-mut-ref.rs:5:27
   |
LL |     x.last_mut().unwrap() = 2;
   |     --------------------- ^
   |     |
   |     cannot assign to this expression
   |
help: consider dereferencing here to assign to the mutably borrowed value
   |
LL |     *x.last_mut().unwrap() = 2;
   |     +

error[E0368]: binary assignment operation `+=` cannot be applied to type `&mut usize`
  --> $DIR/assign-non-lval-mut-ref.rs:7:5
   |
LL |     x.last_mut().unwrap() += 1;
   |     ---------------------^^^^^
   |     |
   |     cannot use `+=` on type `&mut usize`
   |
help: `+=` can be used on `usize` if you dereference the left-hand side
   |
LL |     *x.last_mut().unwrap() += 1;
   |     +

error[E0308]: mismatched types
  --> $DIR/assign-non-lval-mut-ref.rs:11:9
   |
LL |     let y = x.last_mut().unwrap();
   |             --------------------- expected due to this value
LL |     y = 2;
   |         ^ expected `&mut usize`, found integer
   |
help: consider dereferencing here to assign to the mutably borrowed value
   |
LL |     *y = 2;
   |     +

error[E0368]: binary assignment operation `+=` cannot be applied to type `&mut usize`
  --> $DIR/assign-non-lval-mut-ref.rs:13:5
   |
LL |     y += 1;
   |     -^^^^^
   |     |
   |     cannot use `+=` on type `&mut usize`
   |
help: `+=` can be used on `usize` if you dereference the left-hand side
   |
LL |     *y += 1;
   |     +

error: aborting due to 4 previous errors

Some errors have detailed explanations: E0070, E0308, E0368.
For more information about an error, try `rustc --explain E0070`.
Commit	Line	Data
923072b8 FG	1	error[E0070]: invalid left-hand side of assignment
	2	--> $DIR/assign-non-lval-mut-ref.rs:5:27
	3	\|
	4	LL \| x.last_mut().unwrap() = 2;
	5	\| --------------------- ^
	6	\| \|
	7	\| cannot assign to this expression
	8	\|
	9	help: consider dereferencing here to assign to the mutably borrowed value
	10	\|
	11	LL \| *x.last_mut().unwrap() = 2;
	12	\| +
	13
	14	error[E0368]: binary assignment operation `+=` cannot be applied to type `&mut usize`
	15	--> $DIR/assign-non-lval-mut-ref.rs:7:5
	16	\|
	17	LL \| x.last_mut().unwrap() += 1;
	18	\| ---------------------^^^^^
	19	\| \|
	20	\| cannot use `+=` on type `&mut usize`
	21	\|
f2b60f7d	22	help: `+=` can be used on `usize` if you dereference the left-hand side
923072b8 FG	23	\|
	24	LL \| *x.last_mut().unwrap() += 1;
	25	\| +
	26
	27	error[E0308]: mismatched types
	28	--> $DIR/assign-non-lval-mut-ref.rs:11:9
	29	\|
	30	LL \| let y = x.last_mut().unwrap();
	31	\| --------------------- expected due to this value
	32	LL \| y = 2;
	33	\| ^ expected `&mut usize`, found integer
	34	\|
	35	help: consider dereferencing here to assign to the mutably borrowed value
	36	\|
	37	LL \| *y = 2;
	38	\| +
	39
	40	error[E0368]: binary assignment operation `+=` cannot be applied to type `&mut usize`
	41	--> $DIR/assign-non-lval-mut-ref.rs:13:5
	42	\|
	43	LL \| y += 1;
	44	\| -^^^^^
	45	\| \|
	46	\| cannot use `+=` on type `&mut usize`
	47	\|
f2b60f7d	48	help: `+=` can be used on `usize` if you dereference the left-hand side
923072b8 FG	49	\|
	50	LL \| *y += 1;
	51	\| +
	52
	53	error: aborting due to 4 previous errors
	54
	55	Some errors have detailed explanations: E0070, E0308, E0368.
	56	For more information about an error, try `rustc --explain E0070`.