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