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| author | Wesley Wiser <wwiser@gmail.com> | 2017-05-06 23:26:45 -0400 |
|---|---|---|
| committer | Wesley Wiser <wwiser@gmail.com> | 2017-06-19 14:29:12 -0400 |
| commit | 0b29d26079f8e4bb76069b2e3d9c0d8e0f689acf (patch) | |
| tree | 53e524cca7de63e864eee13fda137a3b6ffb285d /src/libstd/macros.rs | |
| parent | 04145943a25c3b8c7e7d7fe8c2efb04f259c25fb (diff) | |
| download | rust-0b29d26079f8e4bb76069b2e3d9c0d8e0f689acf.tar.gz rust-0b29d26079f8e4bb76069b2e3d9c0d8e0f689acf.zip | |
Add compile_error!
Related to #40872
Diffstat (limited to 'src/libstd/macros.rs')
| -rw-r--r-- | src/libstd/macros.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs index 496c014f70e..82c4f0830a6 100644 --- a/src/libstd/macros.rs +++ b/src/libstd/macros.rs @@ -238,6 +238,16 @@ macro_rules! assert_approx_eq { /// into libsyntax itself. #[cfg(dox)] pub 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] + macro_rules! compile_error { ($msg:expr) => ({ /* compiler built-in */ }) } + /// The core macro for formatted string creation & output. /// /// This macro produces a value of type [`fmt::Arguments`]. This value can be |