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| author | Ayush Kumar Mishra <ayush.k.mishra@xcelenergy.com> | 2020-06-09 16:26:21 +0530 |
|---|---|---|
| committer | Ayush Kumar Mishra <ayush.k.mishra@xcelenergy.com> | 2020-06-11 23:16:42 +0530 |
| commit | 68b4c03dbced1a0eae38138a7dd8ecb3ca30c02f (patch) | |
| tree | f8115290f7b955b44fa03f1e1d6d4aa813593864 /src | |
| parent | ccac43b86b559e01fa71179af1a838ab94559c75 (diff) | |
| download | rust-68b4c03dbced1a0eae38138a7dd8ecb3ca30c02f.tar.gz rust-68b4c03dbced1a0eae38138a7dd8ecb3ca30c02f.zip | |
Add long error explanation for E0724
Minor refactoring Minor refactoring Update src/librustc_error_codes/error_codes/E0724.md Co-authored-by: David Wood <Q0KPU0H1YOEPHRY1R2SN5B5RL@david.davidtw.co> Update src/librustc_error_codes/error_codes/E0724.md Co-authored-by: David Wood <Q0KPU0H1YOEPHRY1R2SN5B5RL@david.davidtw.co> Update src/librustc_error_codes/error_codes/E0724.md Co-authored-by: David Wood <Q0KPU0H1YOEPHRY1R2SN5B5RL@david.davidtw.co> Minor refactoring
Diffstat (limited to 'src')
| -rw-r--r-- | src/librustc_error_codes/error_codes.rs | 2 | ||||
| -rw-r--r-- | src/librustc_error_codes/error_codes/E0724.md | 24 | ||||
| -rw-r--r-- | src/test/ui/ffi_returns_twice.stderr | 1 |
3 files changed, 26 insertions, 1 deletions
diff --git a/src/librustc_error_codes/error_codes.rs b/src/librustc_error_codes/error_codes.rs index 760b4d7ba00..04ef1bc876f 100644 --- a/src/librustc_error_codes/error_codes.rs +++ b/src/librustc_error_codes/error_codes.rs @@ -409,6 +409,7 @@ E0718: include_str!("./error_codes/E0718.md"), E0719: include_str!("./error_codes/E0719.md"), E0720: include_str!("./error_codes/E0720.md"), E0723: include_str!("./error_codes/E0723.md"), +E0724: include_str!("./error_codes/E0724.md"), E0725: include_str!("./error_codes/E0725.md"), E0727: include_str!("./error_codes/E0727.md"), E0728: include_str!("./error_codes/E0728.md"), @@ -615,7 +616,6 @@ E0760: include_str!("./error_codes/E0760.md"), E0717, // rustc_promotable without stability attribute // E0721, // `await` keyword E0722, // Malformed `#[optimize]` attribute - E0724, // `#[ffi_returns_twice]` is only allowed in foreign functions E0726, // non-explicit (not `'_`) elided lifetime in unsupported position // E0738, // Removed; errored on `#[track_caller] fn`s in `extern "Rust" { ... }`. E0755, // `#[ffi_pure]` is only allowed on foreign functions diff --git a/src/librustc_error_codes/error_codes/E0724.md b/src/librustc_error_codes/error_codes/E0724.md new file mode 100644 index 00000000000..7a7ba154854 --- /dev/null +++ b/src/librustc_error_codes/error_codes/E0724.md @@ -0,0 +1,24 @@ +`#[ffi_returns_twice]` was used on non-foreign function. + +Erroneous code example: + +```compile_fail,E0724 +#![feature(ffi_returns_twice)] +#![crate_type = "lib"] + +#[ffi_returns_twice] // error! +pub fn foo() {} +``` + +`#[ffi_returns_twice]` can only be used on foreign function declarations. +For example, we might correct the previous example by declaring +the function inside of an `extern` block. + +``` +#![feature(ffi_returns_twice)] + +extern { + #[ffi_returns_twice] // ok! + pub fn foo(); +} +``` diff --git a/src/test/ui/ffi_returns_twice.stderr b/src/test/ui/ffi_returns_twice.stderr index 862892e27be..2b7f5694f02 100644 --- a/src/test/ui/ffi_returns_twice.stderr +++ b/src/test/ui/ffi_returns_twice.stderr @@ -6,3 +6,4 @@ LL | #[ffi_returns_twice] error: aborting due to previous error +For more information about this error, try `rustc --explain E0724`. |