src/librustc_codegen_utils/lib.rs

   1 //! # Note
   2 //!
   3 //! This API is completely unstable and subject to change.
   4
   5 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
   6
   7 #![feature(arbitrary_self_types)]
   8 #![feature(box_patterns)]
   9 #![feature(box_syntax)]
  10 #![feature(custom_attribute)]
  11 #![feature(nll)]
  12 #![allow(unused_attributes)]
  13 #![feature(rustc_diagnostic_macros)]
  14 #![feature(in_band_lifetimes)]
  15
  16 #![recursion_limit="256"]
  17
  18 #![deny(rust_2018_idioms)]
  19 #![deny(internal)]
  20
  21 #[macro_use]
  22 extern crate rustc;
  23
  24 use rustc::ty::TyCtxt;
  25 use rustc::hir::def_id::LOCAL_CRATE;
  26 use syntax::symbol::sym;
  27
  28 pub mod link;
  29 pub mod codegen_backend;
  30 pub mod symbol_names;
  31 pub mod symbol_names_test;
  32
  33 /// check for the #[rustc_error] annotation, which forces an
  34 /// error in codegen. This is used to write compile-fail tests
  35 /// that actually test that compilation succeeds without
  36 /// reporting an error.
  37 pub fn check_for_rustc_errors_attr(tcx: TyCtxt<'_, '_, '_>) {
  38     if let Some((def_id, _)) = tcx.entry_fn(LOCAL_CRATE) {
  39         if tcx.has_attr(def_id, sym::rustc_error) {
  40             tcx.sess.span_fatal(tcx.def_span(def_id), "compilation successful");
  41         }
  42     }
  43 }