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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// These functions are used by macro expansion for bug! and span_bug!
use ty::tls;
use std::fmt;
use syntax_pos::{Span, MultiSpan};
#[cold]
#[inline(never)]
pub fn bug_fmt(file: &'static str, line: u32, args: fmt::Arguments) -> ! {
// this wrapper mostly exists so I don't have to write a fully
// qualified path of None::<Span> inside the bug!() macro definition
opt_span_bug_fmt(file, line, None::<Span>, args);
}
#[cold]
#[inline(never)]
pub fn span_bug_fmt<S: Into<MultiSpan>>(
file: &'static str,
line: u32,
span: S,
args: fmt::Arguments,
) -> ! {
opt_span_bug_fmt(file, line, Some(span), args);
}
fn opt_span_bug_fmt<S: Into<MultiSpan>>(
file: &'static str,
line: u32,
span: Option<S>,
args: fmt::Arguments,
) -> ! {
tls::with_opt(move |tcx| {
let msg = format!("{}:{}: {}", file, line, args);
match (tcx, span) {
(Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
(Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
(None, _) => panic!(msg),
}
});
unreachable!();
}
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