diff options
Diffstat (limited to 'src/libproc_macro/lib.rs')
| -rw-r--r-- | src/libproc_macro/lib.rs | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs index 3f425c24a91..4e7783da671 100644 --- a/src/libproc_macro/lib.rs +++ b/src/libproc_macro/lib.rs @@ -42,6 +42,12 @@ #[macro_use] extern crate syntax; extern crate syntax_pos; +extern crate rustc_errors; + +mod diagnostic; + +#[unstable(feature = "proc_macro", issue = "38356")] +pub use diagnostic::{Diagnostic, Level}; use std::{ascii, fmt, iter}; use std::str::FromStr; @@ -191,12 +197,28 @@ pub fn quote_span(span: Span) -> TokenStream { TokenStream(quote::Quote::quote(&span.0)) } +macro_rules! diagnostic_method { + ($name:ident, $level:expr) => ( + /// Create a new `Diagnostic` with the given `message` at the span + /// `self`. + #[unstable(feature = "proc_macro", issue = "38356")] + pub fn $name<T: Into<String>>(self, message: T) -> Diagnostic { + Diagnostic::spanned(self, $level, message) + } + ) +} + impl Span { /// The span of the invocation of the current procedural macro. #[unstable(feature = "proc_macro", issue = "38356")] pub fn call_site() -> Span { ::__internal::with_sess(|(_, mark)| Span(mark.expn_info().unwrap().call_site)) } + + diagnostic_method!(error, Level::Error); + diagnostic_method!(warning, Level::Warning); + diagnostic_method!(note, Level::Note); + diagnostic_method!(help, Level::Help); } /// A single token or a delimited sequence of token trees (e.g. `[1, (), ..]`). |