bjoernager/rust
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Improve contracts intrisics and remove wrapper function

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1. Document the new intrinsics.
2. Make the intrinsics actually check the contract if enabled, and
   remove `contract::check_requires` function.
3. Use panic with no unwind in case contract is using to check for
   safety, we probably don't want to unwind. Following the same
   reasoning as UB checks.
This commit is contained in:
Celina G. Val 2025-01-17 14:49:10 -08:00
parent 804cce47d9
commit 2bb1464cb6
7 changed files with 57 additions and 72 deletions
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10
compiler/rustc_hir_analysis/src/check/intrinsic.rs
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@ -223,17 +223,15 @@ pub fn check_intrinsic_type(
};
(n_tps, 0, 0, inputs, output, hir::Safety::Unsafe)
} else if intrinsic_name == sym::contract_check_ensures {
// contract_check_ensures::<'a, Ret, C>(&'a Ret, C) -> bool
// contract_check_ensures::<'a, Ret, C>(&'a Ret, C)
// where C: impl Fn(&'a Ret) -> bool,
//
// so: two type params, one lifetime param, 0 const params, two inputs, returns boolean
// so: two type params, one lifetime param, 0 const params, two inputs, no return
let p = generics.param_at(0, tcx);
let r = ty::Region::new_early_param(tcx, p.to_early_bound_region_data());
let ref_ret = Ty::new_imm_ref(tcx, r, param(1));
// let br = ty::BoundRegion { var: ty::BoundVar::ZERO, kind: ty::BrAnon };
// let ref_ret = Ty::new_imm_ref(tcx, ty::Region::new_bound(tcx, ty::INNERMOST, br), param(0));
(2, 1, 0, vec![ref_ret, param(2)], tcx.types.bool, hir::Safety::Safe)
(2, 1, 0, vec![ref_ret, param(2)], tcx.types.unit, hir::Safety::Safe)
} else {
let safety = intrinsic_operation_unsafety(tcx, intrinsic_id);
let (n_tps, n_cts, inputs, output) = match intrinsic_name {
@ -628,7 +626,7 @@ pub fn check_intrinsic_type(
// contract_checks() -> bool
sym::contract_checks => (0, 0, Vec::new(), tcx.types.bool),
// contract_check_requires::<C>(C) -> bool, where C: impl Fn() -> bool
sym::contract_check_requires => (1, 0, vec![param(0)], tcx.types.bool),
sym::contract_check_requires => (1, 0, vec![param(0)], tcx.types.unit),
sym::simd_eq
| sym::simd_ne