Unrolled build for rust-lang#134732

Rollup merge of rust-lang#134732 - compiler-errors:unify-conditional-const-error-reporting, r=RalfJung

Unify conditional-const error reporting with non-const error reporting

This PR unifies the error reporting between `ConditionallyConstCall` and `FnCallNonConst` so that the former will refer to syntactical sugar like operators by their sugared name, rather than calling all operators "methods". We achieve this by making the "non-const" part of the error message generic over the "non" part so we can plug in "conditionally" instead.

This should ensure that as we constify traits in the standard library, we don't regress error messages for things like `==`.

r? fmease or reassign

Author: rust-timer

compiler/rustc_const_eval/messages.ftl

@@ -12,8 +12,6 @@ const_eval_already_reported =
 const_eval_assume_false =
     `assume` called with `false`
 
-const_eval_await_non_const =
-    cannot convert `{$ty}` into a future in {const_eval_const_context}s
 const_eval_bounds_check_failed =
     indexing out of bounds: the len is {$len} but the index is {$index}
 const_eval_call_nonzero_intrinsic =
@@ -23,11 +21,6 @@ const_eval_closure_call =
     closures need an RFC before allowed to be called in {const_eval_const_context}s
 const_eval_closure_fndef_not_const =
     function defined here, but it is not `const`
-const_eval_closure_non_const =
-    cannot call non-const closure in {const_eval_const_context}s
-
-const_eval_conditionally_const_call =
-    cannot call conditionally-const {$def_descr} `{$def_path_str}` in {const_eval_const_context}s
 
 const_eval_consider_dereferencing =
     consider dereferencing here
@@ -62,10 +55,6 @@ const_eval_dealloc_incorrect_layout =
 const_eval_dealloc_kind_mismatch =
     deallocating {$alloc}, which is {$alloc_kind} memory, using {$kind} deallocation operation
 
-const_eval_deref_coercion_non_const =
-    cannot perform deref coercion on `{$ty}` in {const_eval_const_context}s
-    .note = attempting to deref into `{$target_ty}`
-    .target_note = deref defined here
 const_eval_deref_function_pointer =
     accessing {$allocation} which contains a function
 const_eval_deref_vtable_pointer =
@@ -109,9 +98,6 @@ const_eval_extern_type_field = `extern type` field does not have a known offset
 
 const_eval_fn_ptr_call =
     function pointers need an RFC before allowed to be called in {const_eval_const_context}s
-const_eval_for_loop_into_iter_non_const =
-    cannot use `for` loop on `{$ty}` in {const_eval_const_context}s
-
 const_eval_frame_note = {$times ->
     [0] {const_eval_frame_note_inner}
     *[other] [... {$times} additional calls {const_eval_frame_note_inner} ...]
@@ -216,9 +202,6 @@ const_eval_long_running =
     .label = the const evaluator is currently interpreting this expression
     .help = the constant being evaluated
 
-const_eval_match_eq_non_const = cannot match on `{$ty}` in {const_eval_const_context}s
-    .note = `{$ty}` cannot be compared in compile-time, and therefore cannot be used in `match`es
-
 const_eval_max_num_nodes_in_const = maximum number of nodes exceeded in constant {$global_const_id}
 
 const_eval_memory_access_test = memory access failed
@@ -249,18 +232,47 @@ const_eval_mutable_ref_escaping =
         If you really want global mutable state, try using an interior mutable `static` or a `static mut`.
 
 const_eval_nested_static_in_thread_local = #[thread_local] does not support implicit nested statics, please create explicit static items and refer to them instead
+
+const_eval_non_const_await =
+    cannot convert `{$ty}` into a future in {const_eval_const_context}s
+
+const_eval_non_const_closure =
+    cannot call {$non_or_conditionally}-const closure in {const_eval_const_context}s
+
+const_eval_non_const_deref_coercion =
+    cannot perform {$non_or_conditionally}-const deref coercion on `{$ty}` in {const_eval_const_context}s
+    .note = attempting to deref into `{$target_ty}`
+    .target_note = deref defined here
+
 const_eval_non_const_fmt_macro_call =
-    cannot call non-const formatting macro in {const_eval_const_context}s
+    cannot call {$non_or_conditionally}-const formatting macro in {const_eval_const_context}s
 
 const_eval_non_const_fn_call =
-    cannot call non-const {$def_descr} `{$def_path_str}` in {const_eval_const_context}s
+    cannot call {$non_or_conditionally}-const {$def_descr} `{$def_path_str}` in {const_eval_const_context}s
+
+const_eval_non_const_for_loop_into_iter =
+    cannot use `for` loop on `{$ty}` in {const_eval_const_context}s
 
 const_eval_non_const_impl =
     impl defined here, but it is not `const`
 
 const_eval_non_const_intrinsic =
     cannot call non-const intrinsic `{$name}` in {const_eval_const_context}s
 
+const_eval_non_const_match_eq = cannot match on `{$ty}` in {const_eval_const_context}s
+    .note = `{$ty}` cannot be compared in compile-time, and therefore cannot be used in `match`es
+
+const_eval_non_const_operator =
+    cannot call {$non_or_conditionally}-const operator in {const_eval_const_context}s
+
+const_eval_non_const_question_branch =
+    `?` is not allowed on `{$ty}` in {const_eval_const_context}s
+const_eval_non_const_question_from_residual =
+    `?` is not allowed on `{$ty}` in {const_eval_const_context}s
+
+const_eval_non_const_try_block_from_output =
+    `try` block cannot convert `{$ty}` to the result in {const_eval_const_context}s
+
 const_eval_not_enough_caller_args =
     calling a function with fewer arguments than it requires
 
@@ -281,8 +293,6 @@ const_eval_offset_from_unsigned_overflow =
         *[false] offset
     } than second: {$a_offset} < {$b_offset}
 
-const_eval_operator_non_const =
-    cannot call non-const operator in {const_eval_const_context}s
 const_eval_overflow_arith =
     arithmetic overflow in `{$intrinsic}`
 const_eval_overflow_shift =
@@ -325,11 +335,6 @@ const_eval_ptr_as_bytes_1 =
 const_eval_ptr_as_bytes_2 =
     the absolute address of a pointer is not known at compile-time, so such operations are not supported
 
-const_eval_question_branch_non_const =
-    `?` is not allowed on `{$ty}` in {const_eval_const_context}s
-const_eval_question_from_residual_non_const =
-    `?` is not allowed on `{$ty}` in {const_eval_const_context}s
-
 const_eval_range = in the range {$lo}..={$hi}
 const_eval_range_lower = greater or equal to {$lo}
 const_eval_range_singular = equal to {$lo}
@@ -379,8 +384,6 @@ const_eval_too_generic =
 const_eval_too_many_caller_args =
     calling a function with more arguments than it expected
 
-const_eval_try_block_from_output_non_const =
-    `try` block cannot convert `{$ty}` to the result in {const_eval_const_context}s
 const_eval_unallowed_fn_pointer_call = function pointer calls are not allowed in {const_eval_const_context}s
 
 const_eval_unallowed_heap_allocations =

compiler/rustc_const_eval/src/check_consts/check.rs

@@ -708,7 +708,12 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
 
                     if trait_is_const {
                         // Trait calls are always conditionally-const.
-                        self.check_op(ops::ConditionallyConstCall { callee, args: fn_args });
+                        self.check_op(ops::ConditionallyConstCall {
+                            callee,
+                            args: fn_args,
+                            span: *fn_span,
+                            call_source,
+                        });
                         // FIXME(const_trait_impl): do a more fine-grained check whether this
                         // particular trait can be const-stably called.
                     } else {
@@ -726,7 +731,12 @@ impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx> {
 
                 // Even if we know the callee, ensure we can use conditionally-const calls.
                 if has_const_conditions {
-                    self.check_op(ops::ConditionallyConstCall { callee, args: fn_args });
+                    self.check_op(ops::ConditionallyConstCall {
+                        callee,
+                        args: fn_args,
+                        span: *fn_span,
+                        call_source,
+                    });
                 }
 
                 // At this point, we are calling a function, `callee`, whose `DefId` is known...