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Forbid inline const block referencing params from being used in patterns

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This commit is contained in:
Gary Guo 2021-08-14 18:28:21 +01:00
parent 2bd17c1d43
commit 53a7cdd9a3
1 changed files with 6 additions and 1 deletions
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7
compiler/rustc_mir_build/src/thir/pattern/mod.rs
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@ -21,7 +21,7 @@ use rustc_middle::mir::UserTypeProjection;
use rustc_middle::mir::{BorrowKind, Field, Mutability};
use rustc_middle::thir::{Ascription, BindingMode, FieldPat, Pat, PatKind, PatRange, PatTyProj};
use rustc_middle::ty::subst::{GenericArg, SubstsRef};
use rustc_middle::ty::{self, AdtDef, DefIdTree, Region, Ty, TyCtxt, UserType};
use rustc_middle::ty::{self, AdtDef, ConstKind, DefIdTree, Region, Ty, TyCtxt, UserType};
use rustc_span::{Span, Symbol};
use std::cmp::Ordering;
@ -545,6 +545,11 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> {
hir::ExprKind::ConstBlock(ref anon_const) => {
let anon_const_def_id = self.tcx.hir().local_def_id(anon_const.hir_id);
let value = ty::Const::from_anon_const(self.tcx, anon_const_def_id);
if matches!(value.val, ConstKind::Param(_)) {
let span = self.tcx.hir().span(anon_const.hir_id);
self.errors.push(PatternError::ConstParamInPattern(span));
return PatKind::Wild;
}
return *self.const_to_pat(value, expr.hir_id, expr.span, false).kind;
}
hir::ExprKind::Lit(ref lit) => (lit, false),