41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
// These functions are used by macro expansion for bug! and span_bug!
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use crate::ty::tls;
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use std::fmt;
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use syntax_pos::{Span, MultiSpan};
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#[cold]
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#[inline(never)]
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pub fn bug_fmt(file: &'static str, line: u32, args: fmt::Arguments<'_>) -> ! {
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// this wrapper mostly exists so I don't have to write a fully
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// qualified path of None::<Span> inside the bug!() macro definition
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opt_span_bug_fmt(file, line, None::<Span>, args);
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}
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#[cold]
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#[inline(never)]
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pub fn span_bug_fmt<S: Into<MultiSpan>>(
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file: &'static str,
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line: u32,
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span: S,
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args: fmt::Arguments<'_>,
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) -> ! {
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opt_span_bug_fmt(file, line, Some(span), args);
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}
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fn opt_span_bug_fmt<S: Into<MultiSpan>>(
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file: &'static str,
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line: u32,
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span: Option<S>,
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args: fmt::Arguments<'_>,
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) -> ! {
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tls::with_opt(move |tcx| {
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let msg = format!("{}:{}: {}", file, line, args);
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match (tcx, span) {
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(Some(tcx), Some(span)) => tcx.sess.diagnostic().span_bug(span, &msg),
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(Some(tcx), None) => tcx.sess.diagnostic().bug(&msg),
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(None, _) => panic!(msg),
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}
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});
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unreachable!();
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}
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