41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
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// For now C-variadic arguments in trait methods are rejected, though we aim to lift this
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// restriction in the future. In particular we need to think about the interaction with
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// `dyn Trait` and the `ReifyShim`s that it may generate for methods.
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#![feature(c_variadic)]
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#![crate_type = "lib"]
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struct S;
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impl S {
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unsafe extern "C" fn associated_function(mut ap: ...) -> i32 {
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unsafe { ap.arg() }
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}
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unsafe extern "C" fn method(&self, mut ap: ...) -> i32 {
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unsafe { ap.arg() }
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}
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}
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trait T {
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unsafe extern "C" fn trait_associated_function(mut ap: ...) -> i32 {
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//~^ ERROR: associated functions cannot have a C variable argument list
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unsafe { ap.arg() }
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}
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unsafe extern "C" fn trait_method(&self, mut ap: ...) -> i32 {
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//~^ ERROR: associated functions cannot have a C variable argument list
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unsafe { ap.arg() }
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}
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}
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impl T for S {}
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fn main() {
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unsafe {
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assert_eq!(S::associated_function(32), 32);
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assert_eq!(S.method(32), 32);
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assert_eq!(S::trait_associated_function(32), 32);
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assert_eq!(S.trait_method(32), 32);
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}
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}
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