[rustc.git] / src / librustc_error_codes / error_codes / E0518.md

An `#[inline(..)]` attribute was incorrectly placed on something other than a
function or method.

Example of erroneous code:

```compile_fail,E0518
#[inline(always)]
struct Foo;

#[inline(never)]
impl Foo {
    // ...
}
```

`#[inline]` hints the compiler whether or not to attempt to inline a method or
function. By default, the compiler does a pretty good job of figuring this out
itself, but if you feel the need for annotations, `#[inline(always)]` and
`#[inline(never)]` can override or force the compiler's decision.

If you wish to apply this attribute to all methods in an impl, manually annotate
each method; it is not possible to annotate the entire impl with an `#[inline]`
attribute.
Commit	Line	Data
ba9703b0 XL	1	An `#[inline(..)]` attribute was incorrectly placed on something other than a
ba9703b0 XL	2	function or method.
60c5eb7d	3
ba9703b0	4	Example of erroneous code:
60c5eb7d XL	5
	6	```compile_fail,E0518
	7	#[inline(always)]
	8	struct Foo;
	9
	10	#[inline(never)]
	11	impl Foo {
	12	// ...
	13	}
	14	```
	15
	16	`#[inline]` hints the compiler whether or not to attempt to inline a method or
	17	function. By default, the compiler does a pretty good job of figuring this out
	18	itself, but if you feel the need for annotations, `#[inline(always)]` and
	19	`#[inline(never)]` can override or force the compiler's decision.
	20
	21	If you wish to apply this attribute to all methods in an impl, manually annotate
	22	each method; it is not possible to annotate the entire impl with an `#[inline]`
	23	attribute.