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 #![cfg_attr(not(stage0), 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
  27 pub mod link;
  28 pub mod codegen_backend;
  29 pub mod symbol_names;
  30 pub mod symbol_names_test;
  31
  32 /// check for the #[rustc_error] annotation, which forces an
  33 /// error in codegen. This is used to write compile-fail tests
  34 /// that actually test that compilation succeeds without
  35 /// reporting an error.
  36 pub fn check_for_rustc_errors_attr(tcx: TyCtxt<'_, '_, '_>) {
  37     if let Some((def_id, _)) = tcx.entry_fn(LOCAL_CRATE) {
  38         if tcx.has_attr(def_id, "rustc_error") {
  39             tcx.sess.span_fatal(tcx.def_span(def_id), "compilation successful");
  40         }
  41     }
  42 }