New upstream version 1.66.0+dfsg1

[rustc.git] / compiler / rustc_typeck / src / structured_errors / sized_unsized_cast.rs

diff --git a/compiler/rustc_typeck/src/structured_errors/sized_unsized_cast.rs b/compiler/rustc_typeck/src/structured_errors/sized_unsized_cast.rs
deleted file mode 100644 (file)
index bb60880..0000000
--- a/compiler/rustc_typeck/src/structured_errors/sized_unsized_cast.rs
+++ /dev/null
@@ -1,62 +0,0 @@
-use crate::structured_errors::StructuredDiagnostic;
-use rustc_errors::{DiagnosticBuilder, DiagnosticId, ErrorGuaranteed};
-use rustc_middle::ty::{Ty, TypeVisitable};
-use rustc_session::Session;
-use rustc_span::Span;
-
-pub struct SizedUnsizedCast<'tcx> {
-    pub sess: &'tcx Session,
-    pub span: Span,
-    pub expr_ty: Ty<'tcx>,
-    pub cast_ty: String,
-}
-
-impl<'tcx> StructuredDiagnostic<'tcx> for SizedUnsizedCast<'tcx> {
-    fn session(&self) -> &Session {
-        self.sess
-    }
-
-    fn code(&self) -> DiagnosticId {
-        rustc_errors::error_code!(E0607)
-    }
-
-    fn diagnostic_common(&self) -> DiagnosticBuilder<'tcx, ErrorGuaranteed> {
-        let mut err = self.sess.struct_span_err_with_code(
-            self.span,
-            &format!(
-                "cannot cast thin pointer `{}` to fat pointer `{}`",
-                self.expr_ty, self.cast_ty
-            ),
-            self.code(),
-        );
-
-        if self.expr_ty.references_error() {
-            err.downgrade_to_delayed_bug();
-        }
-
-        err
-    }
-
-    fn diagnostic_extended(
-        &self,
-        mut err: DiagnosticBuilder<'tcx, ErrorGuaranteed>,
-    ) -> DiagnosticBuilder<'tcx, ErrorGuaranteed> {
-        err.help(
-            "Thin pointers are \"simple\" pointers: they are purely a reference to a
-memory address.
-
-Fat pointers are pointers referencing \"Dynamically Sized Types\" (also
-called DST). DST don't have a statically known size, therefore they can
-only exist behind some kind of pointers that contain additional
-information. Slices and trait objects are DSTs. In the case of slices,
-the additional information the fat pointer holds is their size.
-
-To fix this error, don't try to cast directly between thin and fat
-pointers.
-
-For more information about casts, take a look at The Book:
-https://doc.rust-lang.org/reference/expressions/operator-expr.html#type-cast-expressions",
-        );
-        err
-    }
-}