compiler/rustc_const_eval/src/lib.rs

   1 /*!
   2
   3 Rust MIR: a lowered representation of Rust.
   4
   5 */
   6
   7 #![feature(assert_matches)]
   8 #![feature(box_patterns)]
   9 #![feature(control_flow_enum)]
  10 #![feature(decl_macro)]
  11 #![feature(exact_size_is_empty)]
  12 #![cfg_attr(bootstrap, feature(let_chains))]
  13 #![feature(let_else)]
  14 #![feature(map_try_insert)]
  15 #![feature(min_specialization)]
  16 #![feature(slice_ptr_get)]
  17 #![feature(option_get_or_insert_default)]
  18 #![feature(never_type)]
  19 #![feature(trait_alias)]
  20 #![feature(trusted_len)]
  21 #![feature(trusted_step)]
  22 #![feature(try_blocks)]
  23 #![feature(yeet_expr)]
  24 #![feature(is_some_with)]
  25 #![recursion_limit = "256"]
  26 #![allow(rustc::potential_query_instability)]
  27
  28 #[macro_use]
  29 extern crate tracing;
  30 #[macro_use]
  31 extern crate rustc_middle;
  32
  33 pub mod const_eval;
  34 mod errors;
  35 pub mod interpret;
  36 mod might_permit_raw_init;
  37 pub mod transform;
  38 pub mod util;
  39
  40 use rustc_middle::ty;
  41 use rustc_middle::ty::query::Providers;
  42 use rustc_target::abi::InitKind;
  43
  44 pub fn provide(providers: &mut Providers) {
  45     const_eval::provide(providers);
  46     providers.eval_to_const_value_raw = const_eval::eval_to_const_value_raw_provider;
  47     providers.eval_to_allocation_raw = const_eval::eval_to_allocation_raw_provider;
  48     providers.const_caller_location = const_eval::const_caller_location;
  49     providers.eval_to_valtree = |tcx, param_env_and_value| {
  50         let (param_env, raw) = param_env_and_value.into_parts();
  51         const_eval::eval_to_valtree(tcx, param_env, raw)
  52     };
  53     providers.try_destructure_mir_constant = |tcx, param_env_and_value| {
  54         let (param_env, value) = param_env_and_value.into_parts();
  55         const_eval::try_destructure_mir_constant(tcx, param_env, value).ok()
  56     };
  57     providers.valtree_to_const_val = |tcx, (ty, valtree)| {
  58         const_eval::valtree_to_const_value(tcx, ty::ParamEnv::empty().and(ty), valtree)
  59     };
  60     providers.deref_mir_constant = |tcx, param_env_and_value| {
  61         let (param_env, value) = param_env_and_value.into_parts();
  62         const_eval::deref_mir_constant(tcx, param_env, value)
  63     };
  64     providers.permits_uninit_init =
  65         |tcx, ty| might_permit_raw_init::might_permit_raw_init(tcx, ty, InitKind::Uninit);
  66     providers.permits_zero_init =
  67         |tcx, ty| might_permit_raw_init::might_permit_raw_init(tcx, ty, InitKind::Zero);
  68 }