diff --git a/src/librustc_mir_build/hair/pattern/mod.rs b/src/librustc_mir_build/hair/pattern/mod.rs index a5c87bc963f..f813ba0c077 100644 --- a/src/librustc_mir_build/hair/pattern/mod.rs +++ b/src/librustc_mir_build/hair/pattern/mod.rs @@ -16,7 +16,7 @@ use rustc_hir::pat_util::EnumerateAndAdjustIterator; use rustc_hir::RangeEnd; use rustc_index::vec::Idx; use rustc_middle::mir::interpret::{get_slice_bytes, sign_extend, ConstValue}; -use rustc_middle::mir::interpret::{LitToConstError, LitToConstInput}; +use rustc_middle::mir::interpret::{ErrorHandled, LitToConstError, LitToConstInput}; use rustc_middle::mir::UserTypeProjection; use rustc_middle::mir::{BorrowKind, Field, Mutability}; use rustc_middle::ty::subst::{GenericArg, SubstsRef}; @@ -834,6 +834,12 @@ impl<'a, 'tcx> PatCtxt<'a, 'tcx> { pattern } } + Err(ErrorHandled::TooGeneric) => { + // While `Reported | Linted` cases will have diagnostics emitted already + // it is not true for TooGeneric case, so we need to give user more information. + self.tcx.sess.span_err(span, "constant pattern depends on a generic parameter"); + pat_from_kind(PatKind::Wild) + } Err(_) => { self.tcx.sess.span_err(span, "could not evaluate constant pattern"); pat_from_kind(PatKind::Wild) diff --git a/src/test/ui/consts/issue-73976-polymorphic.rs b/src/test/ui/consts/issue-73976-polymorphic.rs index 7cf20296062..518036c9dbe 100644 --- a/src/test/ui/consts/issue-73976-polymorphic.rs +++ b/src/test/ui/consts/issue-73976-polymorphic.rs @@ -17,8 +17,8 @@ impl GetTypeId { const fn check_type_id() -> bool { matches!(GetTypeId::::VALUE, GetTypeId::::VALUE) - //~^ ERROR could not evaluate constant pattern - //~| ERROR could not evaluate constant pattern + //~^ ERROR constant pattern depends on a generic parameter + //~| ERROR constant pattern depends on a generic parameter } pub struct GetTypeNameLen(T); @@ -29,8 +29,8 @@ impl GetTypeNameLen { const fn check_type_name_len() -> bool { matches!(GetTypeNameLen::::VALUE, GetTypeNameLen::::VALUE) - //~^ ERROR could not evaluate constant pattern - //~| ERROR could not evaluate constant pattern + //~^ ERROR constant pattern depends on a generic parameter + //~| ERROR constant pattern depends on a generic parameter } fn main() { diff --git a/src/test/ui/consts/issue-73976-polymorphic.stderr b/src/test/ui/consts/issue-73976-polymorphic.stderr index 971573e14aa..250f1536d85 100644 --- a/src/test/ui/consts/issue-73976-polymorphic.stderr +++ b/src/test/ui/consts/issue-73976-polymorphic.stderr @@ -1,22 +1,22 @@ -error: could not evaluate constant pattern +error: constant pattern depends on a generic parameter --> $DIR/issue-73976-polymorphic.rs:19:37 | LL | matches!(GetTypeId::::VALUE, GetTypeId::::VALUE) | ^^^^^^^^^^^^^^^^^^^^^ -error: could not evaluate constant pattern +error: constant pattern depends on a generic parameter --> $DIR/issue-73976-polymorphic.rs:31:42 | LL | matches!(GetTypeNameLen::::VALUE, GetTypeNameLen::::VALUE) | ^^^^^^^^^^^^^^^^^^^^^^^^^^ -error: could not evaluate constant pattern +error: constant pattern depends on a generic parameter --> $DIR/issue-73976-polymorphic.rs:19:37 | LL | matches!(GetTypeId::::VALUE, GetTypeId::::VALUE) | ^^^^^^^^^^^^^^^^^^^^^ -error: could not evaluate constant pattern +error: constant pattern depends on a generic parameter --> $DIR/issue-73976-polymorphic.rs:31:42 | LL | matches!(GetTypeNameLen::::VALUE, GetTypeNameLen::::VALUE)