fc7ec6b614
... as single "internal compiler error" entry point. The macros pass `file!()`, `line!()` and `format_args!(...)` on to a cold, never-inlined function, ultimately calling `bug()` or `span_bug()` on the `Handler` from `session::diagnostic()` via the tcx in tls or, failing that, panicking directly.
62 lines
1.7 KiB
Rust
62 lines
1.7 KiB
Rust
// Copyright 2015 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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macro_rules! enum_from_u32 {
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($(#[$attr:meta])* pub enum $name:ident {
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$($variant:ident = $e:expr,)*
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}) => {
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$(#[$attr])*
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pub enum $name {
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$($variant = $e),*
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}
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impl $name {
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pub fn from_u32(u: u32) -> Option<$name> {
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$(if u == $name::$variant as u32 {
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return Some($name::$variant)
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})*
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None
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}
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}
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};
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($(#[$attr:meta])* pub enum $name:ident {
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$($variant:ident,)*
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}) => {
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$(#[$attr])*
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pub enum $name {
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$($variant,)*
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}
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impl $name {
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pub fn from_u32(u: u32) -> Option<$name> {
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$(if u == $name::$variant as u32 {
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return Some($name::$variant)
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})*
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None
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}
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}
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}
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}
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#[macro_export]
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macro_rules! bug {
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() => ( bug!("impossible case reached") );
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($($message:tt)*) => ({
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$crate::session::bug_fmt(file!(), line!(), format_args!($($message)*))
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})
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}
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#[macro_export]
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macro_rules! span_bug {
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($span:expr, $($message:tt)*) => ({
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$crate::session::span_bug_fmt(file!(), line!(), $span, format_args!($($message)*))
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})
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}
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