ccaa2f855e
If the infcx has observed other errors, then suppress both default type parameter fallback (which can be unreliable, as the full constraint set is not available) and errors related to unresovled variables (annoyingly, integer type variables cannot currently be unified with error, so that has to be a separate mechanism). Also add a flag to `infcx` to allow us to independently indicate when we have observed an error and hence should trigger this suppression mode.
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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extern {
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fn write(fildes: i32, buf: *const i8, nbyte: u64) -> i64;
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}
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#[inline(always)]
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fn size_of<T>(_: T) -> usize {
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::std::mem::size_of::<T>()
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}
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macro_rules! write {
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($arr:expr) => {{
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#[allow(non_upper_case_globals)]
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const stdout: i32 = 1;
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unsafe {
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write(stdout, $arr.as_ptr() as *const i8,
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$arr.len() * size_of($arr[0]));
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//~^ ERROR mismatched types
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}
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}}
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}
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macro_rules! cast {
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($x:expr) => ($x as ())
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}
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fn main() {
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let hello = ['H', 'e', 'y'];
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write!(hello);
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//~^ NOTE in this expansion of write!
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cast!(2);
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}
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