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Display secondary span for E0053 for Sort TypeErrors

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This commit is contained in:
Keith Yeung 2016-08-10 01:43:12 -07:00
parent 7ac11cad3f
commit 3c4ecc9e7c
4 changed files with 70 additions and 23 deletions
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7
src/librustc/hir/map/mod.rs
View File

@ -569,6 +569,13 @@ impl<'ast> Map<'ast> {
}
}
pub fn expect_impl_item(&self, id: NodeId) -> &'ast ImplItem {
match self.find(id) {
Some(NodeImplItem(item)) => item,
_ => bug!("expected impl item, found {}", self.node_to_string(id))
}
}
pub fn expect_trait_item(&self, id: NodeId) -> &'ast TraitItem {
match self.find(id) {
Some(NodeTraitItem(item)) => item,

6
src/librustc/infer/error_reporting.rs
View File

@ -523,6 +523,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
pub fn note_type_err(&self,
diag: &mut DiagnosticBuilder<'tcx>,
origin: TypeOrigin,
secondary_span: Option<(Span, String)>,
values: Option<ValuePairs<'tcx>>,
terr: &TypeError<'tcx>)
{
@ -553,6 +554,9 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
}
diag.span_label(span, &terr);
if let Some((sp, msg)) = secondary_span {
diag.span_label(sp, &msg);
}
self.note_error_origin(diag, &origin);
self.check_and_note_conflicting_crates(diag, terr, span);
@ -569,7 +573,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
self.tcx.sess, trace.origin.span(), E0308,
"{}", trace.origin.as_failure_str()
);
self.note_type_err(&mut diag, trace.origin, Some(trace.values), terr);
self.note_type_err(&mut diag, trace.origin, None, Some(trace.values), terr);
diag
}

2
src/librustc/traits/error_reporting.rs
View File

@ -161,7 +161,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
self.tcx.sess, origin.span(), E0271,
"type mismatch resolving `{}`", predicate
);
self.note_type_err(&mut diag, origin, values, err);
self.note_type_err(&mut diag, origin, None, values, err);
self.note_obligation_cause(&mut diag, obligation);
diag.emit();
});

78
src/librustc_typeck/check/compare_method.rs
View File

@ -12,10 +12,9 @@ use middle::free_region::FreeRegionMap;
use rustc::infer::{self, InferOk, TypeOrigin};
use rustc::ty;
use rustc::traits::{self, Reveal};
use rustc::ty::error::ExpectedFound;
use rustc::ty::error::{ExpectedFound, TypeError};
use rustc::ty::subst::{Subst, Substs};
use rustc::hir::map::Node;
use rustc::hir::{ImplItemKind, TraitItem_};
use rustc::hir::{ImplItemKind, TraitItem_, Ty_};
use syntax::ast;
use syntax_pos::Span;
@ -300,6 +299,7 @@ pub fn compare_impl_method<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
impl_m_span,
impl_m_body_id,
&impl_sig);
let impl_args = impl_sig.inputs.clone();
let impl_fty = tcx.mk_fn_ptr(tcx.mk_bare_fn(ty::BareFnTy {
unsafety: impl_m.fty.unsafety,
abi: impl_m.fty.abi,
@ -318,6 +318,7 @@ pub fn compare_impl_method<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
impl_m_span,
impl_m_body_id,
&trait_sig);
let trait_args = trait_sig.inputs.clone();
let trait_fty = tcx.mk_fn_ptr(tcx.mk_bare_fn(ty::BareFnTy {
unsafety: trait_m.fty.unsafety,
abi: trait_m.fty.abi,
@ -331,16 +332,54 @@ pub fn compare_impl_method<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
impl_fty,
trait_fty);
let impl_m_iter = match tcx.map.expect_impl_item(impl_m_node_id).node {
ImplItemKind::Method(ref impl_m_sig, _) => impl_m_sig.decl.inputs.iter(),
_ => bug!("{:?} is not a method", impl_m)
};
let (impl_err_span, trait_err_span) = match terr {
TypeError::Sorts(ExpectedFound { expected, found }) => {
if let Some(trait_m_node_id) = tcx.map.as_local_node_id(trait_m.def_id) {
let trait_m_iter = match tcx.map.expect_trait_item(trait_m_node_id).node {
TraitItem_::MethodTraitItem(ref trait_m_sig, _) =>
trait_m_sig.decl.inputs.iter(),
_ => bug!("{:?} is not a MethodTraitItem", trait_m)
};
let impl_iter = impl_args.iter();
let trait_iter = trait_args.iter();
let arg_idx = impl_iter.zip(trait_iter)
.position(|(impl_arg_ty, trait_arg_ty)| {
*impl_arg_ty == found && *trait_arg_ty == expected
}).unwrap();
impl_m_iter.zip(trait_m_iter)
.nth(arg_idx)
.map(|(impl_arg, trait_arg)|
(impl_arg.ty.span, Some(trait_arg.ty.span)))
.unwrap_or(
(origin.span(), tcx.map.span_if_local(trait_m.def_id)))
} else {
(origin.span(), tcx.map.span_if_local(trait_m.def_id))
}
}
_ => (origin.span(), tcx.map.span_if_local(trait_m.def_id))
};
let origin = TypeOrigin::MethodCompatCheck(impl_err_span);
let mut diag = struct_span_err!(
tcx.sess, origin.span(), E0053,
"method `{}` has an incompatible type for trait", trait_m.name
);
infcx.note_type_err(
&mut diag, origin,
&mut diag,
origin,
trait_err_span.map(|sp| (sp, format!("original trait requirement"))),
Some(infer::ValuePairs::Types(ExpectedFound {
expected: trait_fty,
found: impl_fty
})), &terr
expected: trait_fty,
found: impl_fty
})),
&terr
);
diag.emit();
return
@ -487,12 +526,9 @@ pub fn compare_const_impl<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
trait_ty);
// Locate the Span containing just the type of the offending impl
if let Some(impl_trait_node) = tcx.map.get_if_local(impl_c.def_id) {
if let Node::NodeImplItem(impl_trait_item) = impl_trait_node {
if let ImplItemKind::Const(ref ty, _) = impl_trait_item.node {
origin = TypeOrigin::Misc(ty.span);
}
}
match tcx.map.expect_impl_item(impl_c_node_id).node {
ImplItemKind::Const(ref ty, _) => origin = TypeOrigin::Misc(ty.span),
_ => bug!("{:?} is not a impl const", impl_c)
}
let mut diag = struct_span_err!(
@ -502,16 +538,16 @@ pub fn compare_const_impl<'a, 'tcx>(ccx: &CrateCtxt<'a, 'tcx>,
);
// Add a label to the Span containing just the type of the item
if let Some(orig_trait_node) = tcx.map.get_if_local(trait_c.def_id) {
if let Node::NodeTraitItem(orig_trait_item) = orig_trait_node {
if let TraitItem_::ConstTraitItem(ref ty, _) = orig_trait_item.node {
diag.span_label(ty.span, &format!("original trait requirement"));
}
}
}
let trait_c_node_id = tcx.map.as_local_node_id(trait_c.def_id).unwrap();
let trait_c_span = match tcx.map.expect_trait_item(trait_c_node_id).node {
TraitItem_::ConstTraitItem(ref ty, _) => ty.span,
_ => bug!("{:?} is not a trait const", trait_c)
};
infcx.note_type_err(
&mut diag, origin,
&mut diag,
origin,
Some((trait_c_span, format!("original trait requirement"))),
Some(infer::ValuePairs::Types(ExpectedFound {
expected: trait_ty,
found: impl_ty