src/librustc_hir/fake_lang_items.rs

   1 //! Validity checking for fake lang items
   2
   3 use crate::def_id::DefId;
   4 use crate::{lang_items, LangItem, LanguageItems};
   5
   6 use rustc_data_structures::fx::FxHashMap;
   7 use rustc_span::symbol::{sym, Symbol};
   8
   9 use lazy_static::lazy_static;
  10
  11 macro_rules! fake_lang_items {
  12     ($($item:ident, $name:ident, $method:ident;)*) => (
  13
  14 lazy_static! {
  15     pub static ref FAKE_ITEMS_REFS: FxHashMap<Symbol, LangItem> = {
  16         let mut map = FxHashMap::default();
  17         $(map.insert(sym::$name, lang_items::$item);)*
  18         map
  19     };
  20 }
  21
  22 impl LanguageItems {
  23     pub fn is_fake_lang_item(&self, item_def_id: DefId) -> bool {
  24         let did = Some(item_def_id);
  25
  26         $(self.$method() == did)||*
  27     }
  28 }
  29
  30 ) }
  31
  32 fake_lang_items! {
  33 //  Variant name,                      Symbol,                    Method name,
  34     CountCodeRegionFnLangItem,         count_code_region,         count_code_region_fn;
  35     CoverageCounterAddFnLangItem,      coverage_counter_add,      coverage_counter_add_fn;
  36     CoverageCounterSubtractFnLangItem, coverage_counter_subtract, coverage_counter_subtract_fn;
  37 }