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Add a way to decouple the implementation and the declaration of a TyCtxt method.

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This commit is contained in:
Oli Scherer 2023-09-22 09:14:39 +00:00
parent 8759de0a49
commit 2157f31731
13 changed files with 96 additions and 28 deletions
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7
compiler/rustc_const_eval/src/const_eval/mod.rs
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@ -4,6 +4,7 @@ use crate::errors::MaxNumNodesInConstErr;
use crate::interpret::{intern_const_alloc_recursive, InternKind, InterpCx, Scalar};
use rustc_middle::mir;
use rustc_middle::mir::interpret::{EvalToValTreeResult, GlobalId};
use rustc_middle::query::TyCtxtAt;
use rustc_middle::ty::{self, Ty, TyCtxt};
use rustc_span::{source_map::DUMMY_SP, symbol::Symbol};
@ -86,17 +87,17 @@ pub(crate) fn eval_to_valtree<'tcx>(
#[instrument(skip(tcx), level = "debug")]
pub(crate) fn try_destructure_mir_constant_for_diagnostics<'tcx>(
tcx: TyCtxt<'tcx>,
tcx: TyCtxtAt<'tcx>,
val: mir::ConstValue<'tcx>,
ty: Ty<'tcx>,
) -> Option<mir::DestructuredConstant<'tcx>> {
let param_env = ty::ParamEnv::reveal_all();
let ecx = mk_eval_cx(tcx, DUMMY_SP, param_env, CanAccessStatics::No);
let ecx = mk_eval_cx(tcx.tcx, tcx.span, param_env, CanAccessStatics::No);
let op = ecx.const_val_to_op(val, ty, None).ok()?;
// We go to `usize` as we cannot allocate anything bigger anyway.
let (field_count, variant, down) = match ty.kind() {
ty::Array(_, len) => (len.eval_target_usize(tcx, param_env) as usize, None, op),
ty::Array(_, len) => (len.eval_target_usize(tcx.tcx, param_env) as usize, None, op),
ty::Adt(def, _) if def.variants().is_empty() => {
return None;
}