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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /compiler/rustc_typeck/src/check/callee.rs | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.tar.xz rustc-17d40c6057c88f4c432b0d7bac88e1b84cb7e67f.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | compiler/rustc_typeck/src/check/callee.rs | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/compiler/rustc_typeck/src/check/callee.rs b/compiler/rustc_typeck/src/check/callee.rs index 75f5aced8..0d35c2479 100644 --- a/compiler/rustc_typeck/src/check/callee.rs +++ b/compiler/rustc_typeck/src/check/callee.rs @@ -1,5 +1,5 @@ use super::method::MethodCallee; -use super::{Expectation, FnCtxt, TupleArgumentsFlag}; +use super::{DefIdOrName, Expectation, FnCtxt, TupleArgumentsFlag}; use crate::type_error_struct; use rustc_errors::{struct_span_err, Applicability, Diagnostic}; @@ -24,7 +24,8 @@ use rustc_span::symbol::{sym, Ident}; use rustc_span::Span; use rustc_target::spec::abi; use rustc_trait_selection::autoderef::Autoderef; -use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt; +use rustc_trait_selection::infer::InferCtxtExt as _; +use rustc_trait_selection::traits::query::evaluate_obligation::InferCtxtExt as _; use std::iter; @@ -471,7 +472,25 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { }; if !self.maybe_suggest_bad_array_definition(&mut err, call_expr, callee_expr) { - err.span_label(call_expr.span, "call expression requires function"); + if let Some((maybe_def, output_ty, _)) = self.extract_callable_info(callee_expr, callee_ty) + && !self.type_is_sized_modulo_regions(self.param_env, output_ty, callee_expr.span) + { + let descr = match maybe_def { + DefIdOrName::DefId(def_id) => self.tcx.def_kind(def_id).descr(def_id), + DefIdOrName::Name(name) => name, + }; + err.span_label( + callee_expr.span, + format!("this {descr} returns an unsized value `{output_ty}`, so it cannot be called") + ); + if let DefIdOrName::DefId(def_id) = maybe_def + && let Some(def_span) = self.tcx.hir().span_if_local(def_id) + { + err.span_label(def_span, "the callable type is defined here"); + } + } else { + err.span_label(call_expr.span, "call expression requires function"); + } } if let Some(span) = self.tcx.hir().res_span(def) { |