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Document that #[inline] is needed for inlining across crate boundaries #2326

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4 changes: 4 additions & 0 deletions src/attributes/codegen.md
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Expand Up @@ -10,6 +10,10 @@ r[attributes.codegen.inline]
r[attributes.codegen.inline.intro]
The *`inline` [attribute]* suggests whether a copy of the attributed function's code should be placed in the caller rather than generating a call to the function.

r[attribute.codegen.inline.crate-boundaries]
The attribute also makes it possible for the compiler to inline non-generic functions across crate boundaries.
Non-generic functions without the *`inline`* [attribute] can not be inlined in another crate.

> [!EXAMPLE]
> ```rust
> #[inline]
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