src/test/compile-fail/variadic-ffi-3.rs

   1 // Copyright 2013 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 extern {
  12     fn foo(f: isize, x: u8, ...);
  13 }
  14
  15 extern "C" fn bar(f: isize, x: u8) {}
  16
  17 fn main() {
  18     unsafe {
  19         foo(); //~ ERROR: this function takes at least 2 parameters but 0 parameters were supplied
  20         foo(1); //~ ERROR: this function takes at least 2 parameters but 1 parameter was supplied
  21
  22         let x: unsafe extern "C" fn(f: isize, x: u8) = foo;
  23         //~^ ERROR: mismatched types
  24         //~| expected `unsafe extern "C" fn(isize, u8)`
  25         //~| found `unsafe extern "C" fn(isize, u8, ...) {foo}`
  26         //~| expected non-variadic fn
  27         //~| found variadic function
  28
  29         let y: extern "C" fn(f: isize, x: u8, ...) = bar;
  30         //~^ ERROR: mismatched types
  31         //~| expected `extern "C" fn(isize, u8, ...)`
  32         //~| found `extern "C" fn(isize, u8) {bar}`
  33         //~| expected variadic fn
  34         //~| found non-variadic function
  35
  36         foo(1, 2, 3f32); //~ ERROR: can't pass an `f32` to variadic function, cast to `c_double`
  37         foo(1, 2, true); //~ ERROR: can't pass `bool` to variadic function, cast to `c_int`
  38         foo(1, 2, 1i8); //~ ERROR: can't pass `i8` to variadic function, cast to `c_int`
  39         foo(1, 2, 1u8); //~ ERROR: can't pass `u8` to variadic function, cast to `c_uint`
  40         foo(1, 2, 1i16); //~ ERROR: can't pass `i16` to variadic function, cast to `c_int`
  41         foo(1, 2, 1u16); //~ ERROR: can't pass `u16` to variadic function, cast to `c_uint`
  42     }
  43 }