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Rollup merge of #42620 - wesleywiser:compile_error, r=brson

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Add compile_error!

Related to #40872
This commit is contained in:
Corey Farwell
2017-06-21 10:40:15 -04:00
committed by GitHub
parent 292fcc880f 2bec12f036
commit d33e2c5181
9 changed files with 116 additions and 0 deletions
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11
src/libcore/macros.rs
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@@ -562,6 +562,17 @@ macro_rules! unimplemented {
///
/// For more information, see documentation for `std`'s macros.
mod builtin {
/// Unconditionally causes compilation to fail with the given error message when encountered.
///
/// For more information, see the [RFC].
///
/// [RFC]: https://github.com/rust-lang/rfcs/blob/master/text/1695-add-error-macro.md
#[unstable(feature = "compile_error_macro", issue = "40872")]
#[macro_export]
#[cfg(dox)]
macro_rules! compile_error { ($msg:expr) => ({ /* compiler built-in */ }) }
/// The core macro for formatted string creation & output.
///
/// For more information, see the documentation for [`std::format_args!`].