diff options
| -rw-r--r-- | src/librustc_typeck/astconv.rs | 2 | ||||
| -rw-r--r-- | src/librustc_typeck/diagnostics.rs | 26 |
2 files changed, 25 insertions, 3 deletions
diff --git a/src/librustc_typeck/astconv.rs b/src/librustc_typeck/astconv.rs index 643c2273eb2..da7c262d63a 100644 --- a/src/librustc_typeck/astconv.rs +++ b/src/librustc_typeck/astconv.rs @@ -1551,7 +1551,7 @@ pub fn ast_ty_to_ty<'tcx>(this: &AstConv<'tcx>, ast::TyParen(ref typ) => ast_ty_to_ty(this, rscope, &**typ), ast::TyBareFn(ref bf) => { if bf.decl.variadic && bf.abi != abi::C { - span_err!(tcx.sess, ast_ty.span, E0222, + span_err!(tcx.sess, ast_ty.span, E0045, "variadic function must have C calling convention"); } let bare_fn = ty_of_bare_fn(this, bf.unsafety, bf.abi, &*bf.decl); diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs index 725bd1d4e08..16af8c6961e 100644 --- a/src/librustc_typeck/diagnostics.rs +++ b/src/librustc_typeck/diagnostics.rs @@ -380,6 +380,28 @@ fn main() { ``` "##, +E0045: r##" +Rust only supports variadic parameters for interoperability with C code in its +FFI. As such, variadic parameters can only be used with functions which are +using the C ABI. Examples of erroneous code: + +``` +extern "rust-call" { fn foo(x: u8, ...); } +// or +fn foo(x: u8, ...) {} +``` + +To fix such code, put them in an extern "C" block: + +``` +extern "C" fn foo (x: u8, ...); +// or: +extern "C" { + fn foo (x: u8, ...); +} +``` +"##, + E0046: r##" When trying to make some type implement a trait `Foo`, you must, at minimum, provide implementations for all of `Foo`'s required methods (meaning the @@ -1467,7 +1489,6 @@ For more information see the [opt-in builtin traits RFC](https://github.com/rust register_diagnostics! { E0044, // foreign items may not have type parameters - E0045, // variadic function must have C calling convention E0068, E0071, E0074, @@ -1535,7 +1556,8 @@ register_diagnostics! { E0219, // associated type defined in higher-ranked supertrait E0220, // associated type not found for type parameter E0221, // ambiguous associated type in bounds - E0222, // variadic function must have C calling convention + //E0222, // Error code E0045 (variadic function must have C calling + // convention) duplicate E0223, // ambiguous associated type E0224, // at least one non-builtin train is required for an object type E0225, // only the builtin traits can be used as closure or object bounds |