From 8a4632dec69082301d3fe67e48d422bc9fb665be Mon Sep 17 00:00:00 2001 From: Ohad Ravid Date: Fri, 13 Dec 2019 19:54:18 +0100 Subject: [PATCH] Indicate origin of where type parameter for uninferred types --- .../infer/error_reporting/need_type_info.rs | 78 +++++++++++++++---- src/librustc/infer/mod.rs | 5 +- src/librustc/infer/resolve.rs | 2 +- src/librustc/infer/type_variable.rs | 3 +- src/librustc/traits/error_reporting.rs | 2 +- .../async-await/unresolved_type_param.stderr | 2 +- .../fn-const-param-infer.stderr | 2 +- src/test/ui/consts/issue-64662.stderr | 4 +- src/test/ui/error-codes/E0401.stderr | 2 +- src/test/ui/issues/issue-12028.stderr | 2 +- src/test/ui/issues/issue-16966.stderr | 2 +- src/test/ui/issues/issue-17551.stderr | 2 +- src/test/ui/issues/issue-25368.stderr | 2 +- src/test/ui/issues/issue-5062.stderr | 2 +- src/test/ui/issues/issue-6458-2.stderr | 2 +- src/test/ui/issues/issue-6458-3.stderr | 2 +- src/test/ui/issues/issue-6458.stderr | 2 +- .../missing-type-parameter.stderr | 2 +- .../span/type-annotations-needed-expr.stderr | 2 +- ...ts-multidispatch-convert-ambig-dest.stderr | 2 +- .../or_else-multiple-type-params.stderr | 2 +- src/test/ui/type-inference/sort_by_key.stderr | 2 +- .../unbounded-associated-type.stderr | 2 +- ...ed-type-param-in-fn-with-assoc-type.stderr | 2 +- .../unbounded-type-param-in-fn.stderr | 2 +- .../ui/type/type-annotation-needed.stderr | 2 +- src/test/ui/unconstrained-none.stderr | 2 +- src/test/ui/unconstrained-ref.stderr | 2 +- 28 files changed, 97 insertions(+), 41 deletions(-) diff --git a/src/librustc/infer/error_reporting/need_type_info.rs b/src/librustc/infer/error_reporting/need_type_info.rs index 8878683f3a7..ebb94cc72ff 100644 --- a/src/librustc/infer/error_reporting/need_type_info.rs +++ b/src/librustc/infer/error_reporting/need_type_info.rs @@ -3,7 +3,7 @@ use crate::hir::intravisit::{self, Visitor, NestedVisitorMap}; use crate::infer::InferCtxt; use crate::infer::type_variable::TypeVariableOriginKind; -use crate::ty::{self, Ty, Infer, TyVar}; +use crate::ty::{self, Ty, Infer, TyVar, DefIdTree}; use crate::ty::print::Print; use syntax::source_map::DesugaringKind; use syntax::symbol::kw; @@ -117,6 +117,8 @@ fn closure_return_type_suggestion( descr: &str, name: &str, ret: &str, + parent_name: Option, + parent_descr: Option<&str>, ) { let (arrow, post) = match output { FunctionRetTy::DefaultReturn(_) => ("-> ", " "), @@ -138,7 +140,12 @@ fn closure_return_type_suggestion( suggestion, Applicability::HasPlaceholders, ); - err.span_label(span, InferCtxt::missing_type_msg(&name, &descr)); + err.span_label(span, InferCtxt::missing_type_msg( + &name, + &descr, + parent_name, + parent_descr + )); } /// Given a closure signature, return a `String` containing a list of all its argument types. @@ -177,16 +184,31 @@ pub fn extract_type_name( &self, ty: Ty<'tcx>, highlight: Option, - ) -> (String, Option, Cow<'static, str>) { + ) -> (String, Option, Cow<'static, str>, Option, Option<&'static str>) { if let ty::Infer(ty::TyVar(ty_vid)) = ty.kind { let ty_vars = self.type_variables.borrow(); let var_origin = ty_vars.var_origin(ty_vid); - if let TypeVariableOriginKind::TypeParameterDefinition(name) = var_origin.kind { + if let TypeVariableOriginKind::TypeParameterDefinition(name, def_id) = var_origin.kind { + let parent_def_id = def_id.and_then(|def_id| self.tcx.parent(def_id)); + let (parent_name, parent_desc) = if let Some(parent_def_id) = parent_def_id { + let parent_name = self.tcx.def_key(parent_def_id).disambiguated_data.data + .get_opt_name().map(|parent_symbol| parent_symbol.to_string()); + + let type_parent_desc = self.tcx.def_kind(parent_def_id) + .map(|parent_def_kind| parent_def_kind.descr(parent_def_id)); + + (parent_name, type_parent_desc) + } else { + (None, None) + }; + if name != kw::SelfUpper { return ( name.to_string(), Some(var_origin.span), "type parameter".into(), + parent_name, + parent_desc, ); } } @@ -198,7 +220,7 @@ pub fn extract_type_name( printer.region_highlight_mode = highlight; } let _ = ty.print(printer); - (s, None, ty.prefix_string()) + (s, None, ty.prefix_string(), None, None) } pub fn need_type_info_err( @@ -209,7 +231,8 @@ pub fn need_type_info_err( error_code: TypeAnnotationNeeded, ) -> DiagnosticBuilder<'tcx> { let ty = self.resolve_vars_if_possible(&ty); - let (name, name_sp, descr) = self.extract_type_name(&ty, None); + let (name, name_sp, descr, parent_name, parent_descr) = self.extract_type_name(&ty, None); + let mut local_visitor = FindLocalByTypeVisitor::new(&self, ty, &self.tcx.hir()); let ty_to_string = |ty: Ty<'tcx>| -> String { @@ -218,7 +241,7 @@ pub fn need_type_info_err( let ty_vars = self.type_variables.borrow(); let getter = move |ty_vid| { let var_origin = ty_vars.var_origin(ty_vid); - if let TypeVariableOriginKind::TypeParameterDefinition(name) = var_origin.kind { + if let TypeVariableOriginKind::TypeParameterDefinition(name, _) = var_origin.kind { return Some(name.to_string()); } None @@ -317,6 +340,8 @@ pub fn need_type_info_err( &descr, &name, &ret, + parent_name, + parent_descr, ); // We don't want to give the other suggestions when the problem is the // closure return type. @@ -433,8 +458,12 @@ pub fn need_type_info_err( if !err.span.span_labels().iter().any(|span_label| { span_label.label.is_some() && span_label.span == span }) && local_visitor.found_arg_pattern.is_none() - { // Avoid multiple labels pointing at `span`. - err.span_label(span, InferCtxt::missing_type_msg(&name, &descr)); + { + // Avoid multiple labels pointing at `span`. + err.span_label( + span, + InferCtxt::missing_type_msg(&name, &descr, parent_name, parent_descr) + ); } err @@ -496,19 +525,42 @@ pub fn need_type_info_err_in_generator( ty: Ty<'tcx>, ) -> DiagnosticBuilder<'tcx> { let ty = self.resolve_vars_if_possible(&ty); - let (name, _, descr) = self.extract_type_name(&ty, None); + let (name, _, descr, parent_name, parent_descr) = self.extract_type_name(&ty, None); + let mut err = struct_span_err!( self.tcx.sess, span, E0698, "type inside {} must be known in this context", kind, ); - err.span_label(span, InferCtxt::missing_type_msg(&name, &descr)); + err.span_label(span, InferCtxt::missing_type_msg( + &name, + &descr, + parent_name, + parent_descr + )); err } - fn missing_type_msg(type_name: &str, descr: &str) -> Cow<'static, str>{ + fn missing_type_msg( + type_name: &str, + descr: &str, + parent_name: Option, + parent_descr: Option<&str>, + ) -> Cow<'static, str> { if type_name == "_" { "cannot infer type".into() } else { - format!("cannot infer type for {} `{}`", descr, type_name).into() + let parent_desc = if let Some(parent_name) = parent_name { + let parent_type_descr = if let Some(parent_descr) = parent_descr { + format!(" the {}", parent_descr) + } else { + "".into() + }; + + format!(" declared on{} `{}`", parent_type_descr, parent_name) + } else { + "".to_string() + }; + + format!("cannot infer type for {} `{}`{}", descr, type_name, parent_desc).into() } } } diff --git a/src/librustc/infer/mod.rs b/src/librustc/infer/mod.rs index 73977878af3..996a722e157 100644 --- a/src/librustc/infer/mod.rs +++ b/src/librustc/infer/mod.rs @@ -1135,7 +1135,10 @@ pub fn var_for_def(&self, span: Span, param: &ty::GenericParamDef) -> GenericArg self.universe(), false, TypeVariableOrigin { - kind: TypeVariableOriginKind::TypeParameterDefinition(param.name), + kind: TypeVariableOriginKind::TypeParameterDefinition( + param.name, + Some(param.def_id) + ), span, }, ); diff --git a/src/librustc/infer/resolve.rs b/src/librustc/infer/resolve.rs index 613f66d7ffd..ea4a28c22a9 100644 --- a/src/librustc/infer/resolve.rs +++ b/src/librustc/infer/resolve.rs @@ -124,7 +124,7 @@ fn visit_ty(&mut self, t: Ty<'tcx>) -> bool { if let ty::TyVar(ty_vid) = infer_ty { let ty_vars = self.infcx.type_variables.borrow(); if let TypeVariableOrigin { - kind: TypeVariableOriginKind::TypeParameterDefinition(_), + kind: TypeVariableOriginKind::TypeParameterDefinition(_, _), span, } = *ty_vars.var_origin(ty_vid) { diff --git a/src/librustc/infer/type_variable.rs b/src/librustc/infer/type_variable.rs index f79a30c7ae8..5a12de25f4b 100644 --- a/src/librustc/infer/type_variable.rs +++ b/src/librustc/infer/type_variable.rs @@ -1,6 +1,7 @@ use syntax::symbol::Symbol; use syntax_pos::Span; use crate::ty::{self, Ty, TyVid}; +use crate::hir::def_id::DefId; use std::cmp; use std::marker::PhantomData; @@ -49,7 +50,7 @@ pub enum TypeVariableOriginKind { MiscVariable, NormalizeProjectionType, TypeInference, - TypeParameterDefinition(Symbol), + TypeParameterDefinition(Symbol, Option), /// One of the upvars or closure kind parameters in a `ClosureSubsts` /// (before it has been determined). diff --git a/src/librustc/traits/error_reporting.rs b/src/librustc/traits/error_reporting.rs index da36b31038d..018bed96664 100644 --- a/src/librustc/traits/error_reporting.rs +++ b/src/librustc/traits/error_reporting.rs @@ -2113,7 +2113,7 @@ fn fold_ty(&mut self, ty: Ty<'tcx>) -> Ty<'tcx> { self.var_map.entry(ty).or_insert_with(|| infcx.next_ty_var( TypeVariableOrigin { - kind: TypeVariableOriginKind::TypeParameterDefinition(name), + kind: TypeVariableOriginKind::TypeParameterDefinition(name, None), span: DUMMY_SP, } ) diff --git a/src/test/ui/async-await/unresolved_type_param.stderr b/src/test/ui/async-await/unresolved_type_param.stderr index b9b4f5133b9..3ffdb8ce6b9 100644 --- a/src/test/ui/async-await/unresolved_type_param.stderr +++ b/src/test/ui/async-await/unresolved_type_param.stderr @@ -2,7 +2,7 @@ error[E0698]: type inside `async fn` body must be known in this context --> $DIR/unresolved_type_param.rs:9:5 | LL | bar().await; - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the function `bar` | note: the type is part of the `async fn` body because of this `await` --> $DIR/unresolved_type_param.rs:9:5 diff --git a/src/test/ui/const-generics/fn-const-param-infer.stderr b/src/test/ui/const-generics/fn-const-param-infer.stderr index 9ccad7bcdd7..44eab8baa40 100644 --- a/src/test/ui/const-generics/fn-const-param-infer.stderr +++ b/src/test/ui/const-generics/fn-const-param-infer.stderr @@ -30,7 +30,7 @@ error[E0282]: type annotations needed --> $DIR/fn-const-param-infer.rs:22:23 | LL | let _ = Checked::; - | ^^^^^^^ cannot infer type for type parameter `T` + | ^^^^^^^ cannot infer type for type parameter `T` declared on the function `generic` error[E0308]: mismatched types --> $DIR/fn-const-param-infer.rs:25:40 diff --git a/src/test/ui/consts/issue-64662.stderr b/src/test/ui/consts/issue-64662.stderr index b3c673ec027..dd281e911da 100644 --- a/src/test/ui/consts/issue-64662.stderr +++ b/src/test/ui/consts/issue-64662.stderr @@ -2,13 +2,13 @@ error[E0282]: type annotations needed --> $DIR/issue-64662.rs:2:9 | LL | A = foo(), - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the function `foo` error[E0282]: type annotations needed --> $DIR/issue-64662.rs:3:9 | LL | B = foo(), - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the function `foo` error: aborting due to 2 previous errors diff --git a/src/test/ui/error-codes/E0401.stderr b/src/test/ui/error-codes/E0401.stderr index 0adf982d71c..8b1d4e6c07c 100644 --- a/src/test/ui/error-codes/E0401.stderr +++ b/src/test/ui/error-codes/E0401.stderr @@ -36,7 +36,7 @@ error[E0282]: type annotations needed --> $DIR/E0401.rs:11:5 | LL | bfnr(x); - | ^^^^ cannot infer type for type parameter `U` + | ^^^^ cannot infer type for type parameter `U` declared on the function `bfnr` error: aborting due to 4 previous errors diff --git a/src/test/ui/issues/issue-12028.stderr b/src/test/ui/issues/issue-12028.stderr index 5f2dd729c73..fe7e8f89f7f 100644 --- a/src/test/ui/issues/issue-12028.stderr +++ b/src/test/ui/issues/issue-12028.stderr @@ -2,7 +2,7 @@ error[E0284]: type annotations needed --> $DIR/issue-12028.rs:27:14 | LL | self.input_stream(&mut stream); - | ^^^^^^^^^^^^ cannot infer type for type parameter `H` + | ^^^^^^^^^^^^ cannot infer type for type parameter `H` declared on the trait `StreamHash` | = note: cannot resolve `<_ as StreamHasher>::S == ::S` diff --git a/src/test/ui/issues/issue-16966.stderr b/src/test/ui/issues/issue-16966.stderr index 0d565af79b5..49a12cc2009 100644 --- a/src/test/ui/issues/issue-16966.stderr +++ b/src/test/ui/issues/issue-16966.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/issue-16966.rs:2:5 | LL | panic!(std::default::Default::default()); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `M` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type for type parameter `M` declared on the function `begin_panic` | = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) diff --git a/src/test/ui/issues/issue-17551.stderr b/src/test/ui/issues/issue-17551.stderr index 5468268e7de..48405a292f3 100644 --- a/src/test/ui/issues/issue-17551.stderr +++ b/src/test/ui/issues/issue-17551.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed for `B` --> $DIR/issue-17551.rs:6:15 | LL | let foo = B(marker::PhantomData); - | --- ^ cannot infer type for type parameter `T` + | --- ^ cannot infer type for type parameter `T` declared on the struct `B` | | | consider giving `foo` the explicit type `B`, where the type parameter `T` is specified diff --git a/src/test/ui/issues/issue-25368.stderr b/src/test/ui/issues/issue-25368.stderr index de020d4b56b..a09de86a708 100644 --- a/src/test/ui/issues/issue-25368.stderr +++ b/src/test/ui/issues/issue-25368.stderr @@ -5,7 +5,7 @@ LL | let (tx, rx) = channel(); | -------- consider giving this pattern the explicit type `(std::sync::mpsc::Sender>, std::sync::mpsc::Receiver>)`, where the type parameter `T` is specified ... LL | tx.send(Foo{ foo: PhantomData }); - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the struct `Foo` error: aborting due to previous error diff --git a/src/test/ui/issues/issue-5062.stderr b/src/test/ui/issues/issue-5062.stderr index a20118d6911..9fa15dc9679 100644 --- a/src/test/ui/issues/issue-5062.stderr +++ b/src/test/ui/issues/issue-5062.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/issue-5062.rs:1:29 | LL | fn main() { format!("{:?}", None); } - | ^^^^ cannot infer type for type parameter `T` + | ^^^^ cannot infer type for type parameter `T` declared on the enum `Option` error: aborting due to previous error diff --git a/src/test/ui/issues/issue-6458-2.stderr b/src/test/ui/issues/issue-6458-2.stderr index d538a69045f..da16f95dc3d 100644 --- a/src/test/ui/issues/issue-6458-2.stderr +++ b/src/test/ui/issues/issue-6458-2.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/issue-6458-2.rs:3:21 | LL | format!("{:?}", None); - | ^^^^ cannot infer type for type parameter `T` + | ^^^^ cannot infer type for type parameter `T` declared on the enum `Option` error: aborting due to previous error diff --git a/src/test/ui/issues/issue-6458-3.stderr b/src/test/ui/issues/issue-6458-3.stderr index 6b3f469ee37..a71c159db0b 100644 --- a/src/test/ui/issues/issue-6458-3.stderr +++ b/src/test/ui/issues/issue-6458-3.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/issue-6458-3.rs:4:5 | LL | mem::transmute(0); - | ^^^^^^^^^^^^^^ cannot infer type for type parameter `U` + | ^^^^^^^^^^^^^^ cannot infer type for type parameter `U` declared on the function `transmute` error: aborting due to previous error diff --git a/src/test/ui/issues/issue-6458.stderr b/src/test/ui/issues/issue-6458.stderr index de315659b6d..f1a982616a4 100644 --- a/src/test/ui/issues/issue-6458.stderr +++ b/src/test/ui/issues/issue-6458.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/issue-6458.rs:9:4 | LL | foo(TypeWithState(marker::PhantomData)); - | ^^^ cannot infer type for type parameter `State` + | ^^^ cannot infer type for type parameter `State` declared on the function `foo` error: aborting due to previous error diff --git a/src/test/ui/missing/missing-items/missing-type-parameter.stderr b/src/test/ui/missing/missing-items/missing-type-parameter.stderr index be97f2373c3..1219badc5b3 100644 --- a/src/test/ui/missing/missing-items/missing-type-parameter.stderr +++ b/src/test/ui/missing/missing-items/missing-type-parameter.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/missing-type-parameter.rs:4:5 | LL | foo(); - | ^^^ cannot infer type for type parameter `X` + | ^^^ cannot infer type for type parameter `X` declared on the function `foo` error: aborting due to previous error diff --git a/src/test/ui/span/type-annotations-needed-expr.stderr b/src/test/ui/span/type-annotations-needed-expr.stderr index 8366285edcd..2b92f9b93bf 100644 --- a/src/test/ui/span/type-annotations-needed-expr.stderr +++ b/src/test/ui/span/type-annotations-needed-expr.stderr @@ -4,7 +4,7 @@ error[E0282]: type annotations needed LL | let _ = (vec![1,2,3]).into_iter().sum() as f64; | ^^^ | | - | cannot infer type for type parameter `S` + | cannot infer type for type parameter `S` declared on the method `sum` | help: consider specifying the type argument in the method call: `sum::` | = note: type must be known at this point diff --git a/src/test/ui/traits/traits-multidispatch-convert-ambig-dest.stderr b/src/test/ui/traits/traits-multidispatch-convert-ambig-dest.stderr index 7bcda234c4b..338c8cbf2e4 100644 --- a/src/test/ui/traits/traits-multidispatch-convert-ambig-dest.stderr +++ b/src/test/ui/traits/traits-multidispatch-convert-ambig-dest.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/traits-multidispatch-convert-ambig-dest.rs:26:5 | LL | test(22, std::default::Default::default()); - | ^^^^ cannot infer type for type parameter `U` + | ^^^^ cannot infer type for type parameter `U` declared on the function `test` error: aborting due to previous error diff --git a/src/test/ui/type-inference/or_else-multiple-type-params.stderr b/src/test/ui/type-inference/or_else-multiple-type-params.stderr index 141cc25ffe2..b9258b20f5a 100644 --- a/src/test/ui/type-inference/or_else-multiple-type-params.stderr +++ b/src/test/ui/type-inference/or_else-multiple-type-params.stderr @@ -4,7 +4,7 @@ error[E0282]: type annotations needed LL | .or_else(|err| { | ^^^^^^^ | | - | cannot infer type for type parameter `F` + | cannot infer type for type parameter `F` declared on the method `or_else` | help: consider specifying the type arguments in the method call: `or_else::` error: aborting due to previous error diff --git a/src/test/ui/type-inference/sort_by_key.stderr b/src/test/ui/type-inference/sort_by_key.stderr index 1d386bd1f42..e74c0dfa5e2 100644 --- a/src/test/ui/type-inference/sort_by_key.stderr +++ b/src/test/ui/type-inference/sort_by_key.stderr @@ -4,7 +4,7 @@ error[E0282]: type annotations needed LL | lst.sort_by_key(|&(v, _)| v.iter().sum()); | ^^^^^^^^^^^ --- help: consider specifying the type argument in the method call: `sum::` | | - | cannot infer type for type parameter `K` + | cannot infer type for type parameter `K` declared on the method `sort_by_key` error: aborting due to previous error diff --git a/src/test/ui/type-inference/unbounded-associated-type.stderr b/src/test/ui/type-inference/unbounded-associated-type.stderr index 726dd4b4758..19e2bd4513d 100644 --- a/src/test/ui/type-inference/unbounded-associated-type.stderr +++ b/src/test/ui/type-inference/unbounded-associated-type.stderr @@ -8,7 +8,7 @@ LL | S(std::marker::PhantomData).foo(); | ^-------------------------------- | | | this method call resolves to `::A` - | cannot infer type for type parameter `X` + | cannot infer type for type parameter `X` declared on the struct `S` error: aborting due to previous error diff --git a/src/test/ui/type-inference/unbounded-type-param-in-fn-with-assoc-type.stderr b/src/test/ui/type-inference/unbounded-type-param-in-fn-with-assoc-type.stderr index 52039d0e934..d60ca4a4932 100644 --- a/src/test/ui/type-inference/unbounded-type-param-in-fn-with-assoc-type.stderr +++ b/src/test/ui/type-inference/unbounded-type-param-in-fn-with-assoc-type.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/unbounded-type-param-in-fn-with-assoc-type.rs:8:5 | LL | foo(); - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the function `foo` error: aborting due to previous error diff --git a/src/test/ui/type-inference/unbounded-type-param-in-fn.stderr b/src/test/ui/type-inference/unbounded-type-param-in-fn.stderr index 8d317df6ce9..45d879d8d56 100644 --- a/src/test/ui/type-inference/unbounded-type-param-in-fn.stderr +++ b/src/test/ui/type-inference/unbounded-type-param-in-fn.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/unbounded-type-param-in-fn.rs:6:5 | LL | foo(); - | ^^^ cannot infer type for type parameter `T` + | ^^^ cannot infer type for type parameter `T` declared on the function `foo` error: aborting due to previous error diff --git a/src/test/ui/type/type-annotation-needed.stderr b/src/test/ui/type/type-annotation-needed.stderr index 94425440d33..c6a811e8363 100644 --- a/src/test/ui/type/type-annotation-needed.stderr +++ b/src/test/ui/type/type-annotation-needed.stderr @@ -7,7 +7,7 @@ LL | fn foo>(x: i32) {} LL | foo(42); | ^^^ | | - | cannot infer type for type parameter `T` + | cannot infer type for type parameter `T` declared on the function `foo` | help: consider specifying the type argument in the function call: `foo::` | = note: cannot resolve `_: std::convert::Into` diff --git a/src/test/ui/unconstrained-none.stderr b/src/test/ui/unconstrained-none.stderr index 6c4fde94a61..fbd71bd091d 100644 --- a/src/test/ui/unconstrained-none.stderr +++ b/src/test/ui/unconstrained-none.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/unconstrained-none.rs:4:5 | LL | None; - | ^^^^ cannot infer type for type parameter `T` + | ^^^^ cannot infer type for type parameter `T` declared on the enum `Option` error: aborting due to previous error diff --git a/src/test/ui/unconstrained-ref.stderr b/src/test/ui/unconstrained-ref.stderr index d6985a61daf..eb8ebb5165d 100644 --- a/src/test/ui/unconstrained-ref.stderr +++ b/src/test/ui/unconstrained-ref.stderr @@ -2,7 +2,7 @@ error[E0282]: type annotations needed --> $DIR/unconstrained-ref.rs:6:5 | LL | S { o: &None }; - | ^ cannot infer type for type parameter `T` + | ^ cannot infer type for type parameter `T` declared on the struct `S` error: aborting due to previous error -- 2.44.0