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28 lines
1.0 KiB
Rust
28 lines
1.0 KiB
Rust
extern "C" {
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fn printf(c: *const i8, ...);
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}
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fn main() {
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unsafe {
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printf(::std::ptr::null(), 0f32);
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//~^ ERROR can't pass `f32` to variadic function
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//~| HELP cast the value to `c_double`
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printf(::std::ptr::null(), 0i8);
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//~^ ERROR can't pass `i8` to variadic function
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//~| HELP cast the value to `c_int`
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printf(::std::ptr::null(), 0i16);
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//~^ ERROR can't pass `i16` to variadic function
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//~| HELP cast the value to `c_int`
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printf(::std::ptr::null(), 0u8);
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//~^ ERROR can't pass `u8` to variadic function
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//~| HELP cast the value to `c_uint`
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printf(::std::ptr::null(), 0u16);
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//~^ ERROR can't pass `u16` to variadic function
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//~| HELP cast the value to `c_uint`
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printf(::std::ptr::null(), printf);
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//~^ ERROR can't pass a function item to a variadic function
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//~| HELP a function item is zero-sized and needs to be cast into a function pointer to be used in FFI
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//~| HELP use a function pointer instead
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}
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}
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