Auto merge of #52244 - glandium:issue52097, r=estebank
Don't display default generic parameters in diagnostics that compare types
In errors like:
```
expected type: `RawVec<foo, Global>`
found type: `foo`
```
`RawVec` being defined as `RawVec<T, A: Alloc = Global>`, the error is better written as
```
expected type: `RawVec<foo>`
found type: `foo`
```
In fact, that is already what happens when `foo` is not an ADT, because in that case, the diagnostic handler doesn't try to highlight something, and just uses the `Display` trait instead of its own logic.
e.g.
```
expected type: `RawVec<usize>`
found type: `usize`
```
This commit is contained in:
bors
commit
0a8275f8b6
@ -60,13 +60,13 @@ use super::{InferCtxt, RegionVariableOrigin, SubregionOrigin, TypeTrace, ValuePa
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use super::region_constraints::GenericKind;
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use super::lexical_region_resolve::RegionResolutionError;
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use std::fmt;
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use std::{cmp, fmt};
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use hir;
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use hir::map as hir_map;
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use hir::def_id::DefId;
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use middle::region;
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use traits::{ObligationCause, ObligationCauseCode};
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use ty::{self, Region, Ty, TyCtxt, TypeFoldable, TypeVariants};
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use ty::{self, subst::Subst, Region, Ty, TyCtxt, TypeFoldable, TypeVariants};
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use ty::error::TypeError;
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use syntax::ast::DUMMY_NODE_ID;
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use syntax_pos::{Pos, Span};
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@ -652,6 +652,43 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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}
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}
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/// For generic types with parameters with defaults, remove the parameters corresponding to
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/// the defaults. This repeats a lot of the logic found in `PrintContext::parameterized`.
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fn strip_generic_default_params(
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&self,
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def_id: DefId,
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substs: &ty::subst::Substs<'tcx>
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) -> &'tcx ty::subst::Substs<'tcx> {
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let generics = self.tcx.generics_of(def_id);
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let mut num_supplied_defaults = 0;
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let mut type_params = generics.params.iter().rev().filter_map(|param| match param.kind {
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ty::GenericParamDefKind::Lifetime => None,
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ty::GenericParamDefKind::Type { has_default, .. } => {
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Some((param.def_id, has_default))
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}
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}).peekable();
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let has_default = {
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let has_default = type_params.peek().map(|(_, has_default)| has_default);
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*has_default.unwrap_or(&false)
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};
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if has_default {
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let types = substs.types().rev();
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for ((def_id, has_default), actual) in type_params.zip(types) {
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if !has_default {
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break;
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}
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if self.tcx.type_of(def_id).subst(self.tcx, substs) != actual {
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break;
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}
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num_supplied_defaults += 1;
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}
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}
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let len = generics.params.len();
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let mut generics = generics.clone();
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generics.params.truncate(len - num_supplied_defaults);
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substs.truncate_to(self.tcx, &generics)
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}
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/// Compare two given types, eliding parts that are the same between them and highlighting
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/// relevant differences, and return two representation of those types for highlighted printing.
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fn cmp(&self, t1: Ty<'tcx>, t2: Ty<'tcx>) -> (DiagnosticStyledString, DiagnosticStyledString) {
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@ -693,6 +730,8 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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match (&t1.sty, &t2.sty) {
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(&ty::TyAdt(def1, sub1), &ty::TyAdt(def2, sub2)) => {
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let sub_no_defaults_1 = self.strip_generic_default_params(def1.did, sub1);
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let sub_no_defaults_2 = self.strip_generic_default_params(def2.did, sub2);
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let mut values = (DiagnosticStyledString::new(), DiagnosticStyledString::new());
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let path1 = self.tcx.item_path_str(def1.did.clone());
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let path2 = self.tcx.item_path_str(def2.did.clone());
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@ -708,8 +747,19 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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values.0.push_normal(path1);
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values.1.push_normal(path2);
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// Avoid printing out default generic parameters that are common to both
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// types.
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let len1 = sub_no_defaults_1.len();
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let len2 = sub_no_defaults_2.len();
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let common_len = cmp::min(len1, len2);
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let remainder1: Vec<_> = sub1.types().skip(common_len).collect();
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let remainder2: Vec<_> = sub2.types().skip(common_len).collect();
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let common_default_params =
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remainder1.iter().rev().zip(remainder2.iter().rev())
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.filter(|(a, b)| a == b).count();
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let len = sub1.len() - common_default_params;
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// Only draw `<...>` if there're lifetime/type arguments.
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let len = sub1.len();
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if len > 0 {
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values.0.push_normal("<");
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values.1.push_normal("<");
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@ -754,7 +804,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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// ^ elided type as this type argument was the same in both sides
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let type_arguments = sub1.types().zip(sub2.types());
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let regions_len = sub1.regions().collect::<Vec<_>>().len();
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for (i, (ta1, ta2)) in type_arguments.enumerate() {
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for (i, (ta1, ta2)) in type_arguments.take(len).enumerate() {
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let i = i + regions_len;
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if ta1 == ta2 {
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values.0.push_normal("_");
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@ -784,7 +834,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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&mut values.0,
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&mut values.1,
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path1.clone(),
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sub1,
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sub_no_defaults_1,
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path2.clone(),
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&t2,
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).is_some()
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@ -796,8 +846,14 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
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// Bar<Qux>
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// Foo<Bar<Qux>>
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// ------- this type argument is exactly the same as the other type
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if self.cmp_type_arg(&mut values.1, &mut values.0, path2, sub2, path1, &t1)
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.is_some()
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if self.cmp_type_arg(
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&mut values.1,
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&mut values.0,
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path2,
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sub_no_defaults_2,
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path1,
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&t1,
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).is_some()
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{
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return values;
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}
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86
src/test/ui/type-mismatch.rs
Normal file
86
src/test/ui/type-mismatch.rs
Normal file
@ -0,0 +1,86 @@
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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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trait Qux {}
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struct A;
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struct B;
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impl Qux for A {}
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impl Qux for B {}
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struct Foo<T, U: Qux = A, V: Qux = B>(T, U, V);
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struct foo;
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struct bar;
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fn want<T>(t: T) {}
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fn have_usize(f: usize) {
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want::<foo>(f); //~ ERROR mismatched types
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want::<bar>(f); //~ ERROR mismatched types
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want::<Foo<usize>>(f); //~ ERROR mismatched types
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want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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want::<Foo<foo>>(f); //~ ERROR mismatched types
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want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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want::<Foo<bar>>(f); //~ ERROR mismatched types
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want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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}
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fn have_foo(f: foo) {
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want::<usize>(f); //~ ERROR mismatched types
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want::<bar>(f); //~ ERROR mismatched types
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want::<Foo<usize>>(f); //~ ERROR mismatched types
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want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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want::<Foo<foo>>(f); //~ ERROR mismatched types
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want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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want::<Foo<bar>>(f); //~ ERROR mismatched types
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want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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}
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fn have_foo_foo(f: Foo<foo>) {
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want::<usize>(f); //~ ERROR mismatched types
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want::<foo>(f); //~ ERROR mismatched types
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want::<bar>(f); //~ ERROR mismatched types
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want::<Foo<usize>>(f); //~ ERROR mismatched types
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want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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want::<Foo<bar>>(f); //~ ERROR mismatched types
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want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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want::<&Foo<foo>>(f); //~ ERROR mismatched types
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want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
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}
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fn have_foo_foo_b(f: Foo<foo, B>) {
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want::<usize>(f); //~ ERROR mismatched types
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want::<foo>(f); //~ ERROR mismatched types
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want::<bar>(f); //~ ERROR mismatched types
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want::<Foo<usize>>(f); //~ ERROR mismatched types
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want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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want::<Foo<foo>>(f); //~ ERROR mismatched types
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want::<Foo<bar>>(f); //~ ERROR mismatched types
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want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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want::<&Foo<foo>>(f); //~ ERROR mismatched types
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want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
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}
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fn have_foo_foo_b_a(f: Foo<foo, B, A>) {
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want::<usize>(f); //~ ERROR mismatched types
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want::<foo>(f); //~ ERROR mismatched types
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want::<bar>(f); //~ ERROR mismatched types
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want::<Foo<usize>>(f); //~ ERROR mismatched types
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want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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want::<Foo<foo>>(f); //~ ERROR mismatched types
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want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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want::<Foo<bar>>(f); //~ ERROR mismatched types
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want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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want::<&Foo<foo>>(f); //~ ERROR mismatched types
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want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
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}
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fn main() {}
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432
src/test/ui/type-mismatch.stderr
Normal file
432
src/test/ui/type-mismatch.stderr
Normal file
@ -0,0 +1,432 @@
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:25:17
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LL | want::<foo>(f); //~ ERROR mismatched types
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| ^ expected struct `foo`, found usize
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|
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= note: expected type `foo`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:26:17
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|
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LL | want::<bar>(f); //~ ERROR mismatched types
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| ^ expected struct `bar`, found usize
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|
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= note: expected type `bar`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:27:24
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|
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LL | want::<Foo<usize>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<usize>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:28:27
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|
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LL | want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<usize, B>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:29:22
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|
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LL | want::<Foo<foo>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<foo>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:30:25
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|
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LL | want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<foo, B>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:31:22
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|
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LL | want::<Foo<bar>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<bar>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:32:25
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|
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LL | want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found usize
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|
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= note: expected type `Foo<bar, B>`
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found type `usize`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:36:19
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|
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LL | want::<usize>(f); //~ ERROR mismatched types
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| ^ expected usize, found struct `foo`
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|
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= note: expected type `usize`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:37:17
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|
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LL | want::<bar>(f); //~ ERROR mismatched types
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| ^ expected struct `bar`, found struct `foo`
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|
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= note: expected type `bar`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:38:24
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|
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LL | want::<Foo<usize>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
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= note: expected type `Foo<usize>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:39:27
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|
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LL | want::<Foo<usize, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
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= note: expected type `Foo<usize, B>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:40:22
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|
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LL | want::<Foo<foo>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
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= note: expected type `Foo<foo>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:41:25
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|
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LL | want::<Foo<foo, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
|
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= note: expected type `Foo<foo, B>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:42:22
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|
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LL | want::<Foo<bar>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
|
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= note: expected type `Foo<bar>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:43:25
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|
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LL | want::<Foo<bar, B>>(f); //~ ERROR mismatched types
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| ^ expected struct `Foo`, found struct `foo`
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|
|
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= note: expected type `Foo<bar, B>`
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found type `foo`
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:47:19
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|
|
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LL | want::<usize>(f); //~ ERROR mismatched types
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| ^ expected usize, found struct `Foo`
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|
|
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= note: expected type `usize`
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found type `Foo<foo>`
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|
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error[E0308]: mismatched types
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--> $DIR/type-mismatch.rs:48:17
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|
|
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LL | want::<foo>(f); //~ ERROR mismatched types
|
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| ^ expected struct `foo`, found struct `Foo`
|
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|
|
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= note: expected type `foo`
|
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found type `Foo<foo>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/type-mismatch.rs:49:17
|
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|
|
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LL | want::<bar>(f); //~ ERROR mismatched types
|
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| ^ expected struct `bar`, found struct `Foo`
|
||||
|
|
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= note: expected type `bar`
|
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found type `Foo<foo>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/type-mismatch.rs:50:24
|
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|
|
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LL | want::<Foo<usize>>(f); //~ ERROR mismatched types
|
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| ^ expected usize, found struct `foo`
|
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|
|
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= note: expected type `Foo<usize>`
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found type `Foo<foo>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/type-mismatch.rs:51:27
|
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|
|
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LL | want::<Foo<usize, B>>(f); //~ ERROR mismatched types
|
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| ^ expected usize, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<usize, B>`
|
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found type `Foo<foo, A>`
|
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|
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error[E0308]: mismatched types
|
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--> $DIR/type-mismatch.rs:52:25
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|
|
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LL | want::<Foo<foo, B>>(f); //~ ERROR mismatched types
|
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| ^ expected struct `B`, found struct `A`
|
||||
|
|
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= note: expected type `Foo<_, B>`
|
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found type `Foo<_, A>`
|
||||
|
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error[E0308]: mismatched types
|
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--> $DIR/type-mismatch.rs:53:22
|
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|
|
||||
LL | want::<Foo<bar>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar>`
|
||||
found type `Foo<foo>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:54:25
|
||||
|
|
||||
LL | want::<Foo<bar, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar, B>`
|
||||
found type `Foo<foo, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:55:23
|
||||
|
|
||||
LL | want::<&Foo<foo>>(f); //~ ERROR mismatched types
|
||||
| ^
|
||||
| |
|
||||
| expected &Foo<foo>, found struct `Foo`
|
||||
| help: consider borrowing here: `&f`
|
||||
|
|
||||
= note: expected type `&Foo<foo>`
|
||||
found type `Foo<foo>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:56:26
|
||||
|
|
||||
LL | want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected reference, found struct `Foo`
|
||||
|
|
||||
= note: expected type `&Foo<foo, B>`
|
||||
found type `Foo<foo>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:60:19
|
||||
|
|
||||
LL | want::<usize>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `Foo`
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:61:17
|
||||
|
|
||||
LL | want::<foo>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `foo`, found struct `Foo`
|
||||
|
|
||||
= note: expected type `foo`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:62:17
|
||||
|
|
||||
LL | want::<bar>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `Foo`
|
||||
|
|
||||
= note: expected type `bar`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:63:24
|
||||
|
|
||||
LL | want::<Foo<usize>>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<usize, A>`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:64:27
|
||||
|
|
||||
LL | want::<Foo<usize, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<usize, _>`
|
||||
found type `Foo<foo, _>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:65:22
|
||||
|
|
||||
LL | want::<Foo<foo>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `A`, found struct `B`
|
||||
|
|
||||
= note: expected type `Foo<_, A>`
|
||||
found type `Foo<_, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:66:22
|
||||
|
|
||||
LL | want::<Foo<bar>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar, A>`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:67:25
|
||||
|
|
||||
LL | want::<Foo<bar, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar, _>`
|
||||
found type `Foo<foo, _>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:68:23
|
||||
|
|
||||
LL | want::<&Foo<foo>>(f); //~ ERROR mismatched types
|
||||
| ^ expected &Foo<foo>, found struct `Foo`
|
||||
|
|
||||
= note: expected type `&Foo<foo>`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:69:26
|
||||
|
|
||||
LL | want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
|
||||
| ^
|
||||
| |
|
||||
| expected reference, found struct `Foo`
|
||||
| help: consider borrowing here: `&f`
|
||||
|
|
||||
= note: expected type `&Foo<foo, B>`
|
||||
found type `Foo<foo, B>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:73:19
|
||||
|
|
||||
LL | want::<usize>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `Foo`
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:74:17
|
||||
|
|
||||
LL | want::<foo>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `foo`, found struct `Foo`
|
||||
|
|
||||
= note: expected type `foo`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:75:17
|
||||
|
|
||||
LL | want::<bar>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `Foo`
|
||||
|
|
||||
= note: expected type `bar`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:76:24
|
||||
|
|
||||
LL | want::<Foo<usize>>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<usize, A, B>`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:77:27
|
||||
|
|
||||
LL | want::<Foo<usize, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected usize, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<usize, _, B>`
|
||||
found type `Foo<foo, _, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:78:22
|
||||
|
|
||||
LL | want::<Foo<foo>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `A`, found struct `B`
|
||||
|
|
||||
= note: expected type `Foo<_, A, B>`
|
||||
found type `Foo<_, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:79:25
|
||||
|
|
||||
LL | want::<Foo<foo, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `B`, found struct `A`
|
||||
|
|
||||
= note: expected type `Foo<_, _, B>`
|
||||
found type `Foo<_, _, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:80:22
|
||||
|
|
||||
LL | want::<Foo<bar>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar, A, B>`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:81:25
|
||||
|
|
||||
LL | want::<Foo<bar, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected struct `bar`, found struct `foo`
|
||||
|
|
||||
= note: expected type `Foo<bar, _, B>`
|
||||
found type `Foo<foo, _, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:82:23
|
||||
|
|
||||
LL | want::<&Foo<foo>>(f); //~ ERROR mismatched types
|
||||
| ^ expected &Foo<foo>, found struct `Foo`
|
||||
|
|
||||
= note: expected type `&Foo<foo>`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/type-mismatch.rs:83:26
|
||||
|
|
||||
LL | want::<&Foo<foo, B>>(f); //~ ERROR mismatched types
|
||||
| ^ expected reference, found struct `Foo`
|
||||
|
|
||||
= note: expected type `&Foo<foo, B>`
|
||||
found type `Foo<foo, B, A>`
|
||||
|
||||
error: aborting due to 47 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0308`.
|
||||
Loading…
Reference in New Issue
Block a user