01e83adc88
but a C-variadic method makes a trait dyn-incompatible. That is because methods from dyn traits, when cast to a function pointer, create a shim. That shim can't really forward the c-variadic arguments.
85 lines
3.0 KiB
Rust
85 lines
3.0 KiB
Rust
#![feature(c_variadic)]
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#![allow(anonymous_parameters)]
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fn main() {}
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fn f1_1(x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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fn f1_2(...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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unsafe extern "Rust" fn f1_3(...) {}
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//~^ ERROR `...` is not supported for `extern "Rust"` functions
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extern "C" fn f2_1(x: isize, ...) {}
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//~^ ERROR functions with a C variable argument list must be unsafe
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extern "C" fn f2_2(...) {}
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//~^ ERROR functions with a C variable argument list must be unsafe
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extern "C" fn f2_3(..., x: isize) {}
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//~^ ERROR `...` must be the last argument of a C-variadic function
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extern "C" fn f3_1(x: isize, ...) {}
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//~^ ERROR functions with a C variable argument list must be unsafe
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extern "C" fn f3_2(...) {}
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//~^ ERROR functions with a C variable argument list must be unsafe
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extern "C" fn f3_3(..., x: isize) {}
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//~^ ERROR `...` must be the last argument of a C-variadic function
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const unsafe extern "C" fn f4_1(x: isize, ...) {}
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//~^ ERROR functions cannot be both `const` and C-variadic
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//~| ERROR destructor of `VaListImpl<'_>` cannot be evaluated at compile-time
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const extern "C" fn f4_2(x: isize, ...) {}
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//~^ ERROR functions cannot be both `const` and C-variadic
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//~| ERROR functions with a C variable argument list must be unsafe
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//~| ERROR destructor of `VaListImpl<'_>` cannot be evaluated at compile-time
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const extern "C" fn f4_3(..., x: isize, ...) {}
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//~^ ERROR functions cannot be both `const` and C-variadic
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//~| ERROR functions with a C variable argument list must be unsafe
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//~| ERROR `...` must be the last argument of a C-variadic function
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extern "C" {
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fn e_f2(..., x: isize);
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//~^ ERROR `...` must be the last argument of a C-variadic function
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}
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struct X;
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impl X {
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fn i_f1(x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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fn i_f2(...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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fn i_f3(..., x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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//~| ERROR `...` must be the last argument of a C-variadic function
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fn i_f4(..., x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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//~| ERROR `...` must be the last argument of a C-variadic function
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const fn i_f5(x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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//~| ERROR functions cannot be both `const` and C-variadic
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//~| ERROR destructor of `VaListImpl<'_>` cannot be evaluated at compile-time
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}
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trait T {
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fn t_f1(x: isize, ...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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fn t_f2(x: isize, ...);
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//~^ ERROR `...` is not supported for non-extern functions
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fn t_f3(...) {}
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//~^ ERROR `...` is not supported for non-extern functions
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fn t_f4(...);
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//~^ ERROR `...` is not supported for non-extern functions
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fn t_f5(..., x: isize) {}
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//~^ ERROR `...` must be the last argument of a C-variadic function
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fn t_f6(..., x: isize);
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//~^ ERROR `...` must be the last argument of a C-variadic function
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}
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