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Detect
fn
with a body in an extern
block
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,11 @@ | ||
extern "C" { | ||
fn foo() -> i32 { //~ ERROR incorrect `fn` inside `extern` block | ||
return 0; | ||
} | ||
} | ||
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extern "C" fn bar() -> i32 { | ||
return 0; | ||
} | ||
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fn main() {} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,18 @@ | ||
error: incorrect `fn` inside `extern` block | ||
--> $DIR/extern-ffi-fn-with-body.rs:2:8 | ||
| | ||
LL | extern "C" { | ||
| ------ `extern` blocks define existing foreign functions and `fn`s inside of them can't have a body | ||
LL | fn foo() -> i32 { | ||
| ________^^^__________- | ||
| | | | ||
| | can't have a body | ||
LL | | return 0; | ||
LL | | } | ||
| |_____- this body is invalid here | ||
| | ||
= help: you might have meant to write a function accessible through ffi, which can be done by writing `extern fn` outside of the `extern` block | ||
= note: for more information, visit https://doc.rust-lang.org/std/keyword.extern.html | ||
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error: aborting due to previous error | ||
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