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refactor report_generic_bound_failure to be usable by NLL code

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This commit is contained in:
Niko Matsakis 2017-12-19 11:10:53 -05:00
parent 6b39781df6
commit 3788f4207d
1 changed files with 22 additions and 13 deletions
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35
src/librustc/infer/error_reporting/mod.rs
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@ -304,8 +304,14 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
self.report_concrete_failure(region_scope_tree, origin, sub, sup).emit();
}
RegionResolutionError::GenericBoundFailure(kind, param_ty, sub) => {
self.report_generic_bound_failure(region_scope_tree, kind, param_ty, sub);
RegionResolutionError::GenericBoundFailure(origin, param_ty, sub) => {
self.report_generic_bound_failure(
region_scope_tree,
origin.span(),
Some(origin),
param_ty,
sub,
);
}
RegionResolutionError::SubSupConflict(var_origin,
@ -901,11 +907,12 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
DiagnosticStyledString::highlighted(format!("{}", exp_found.found))))
}
fn report_generic_bound_failure(&self,
region_scope_tree: &region::ScopeTree,
origin: SubregionOrigin<'tcx>,
bound_kind: GenericKind<'tcx>,
sub: Region<'tcx>)
pub fn report_generic_bound_failure(&self,
region_scope_tree: &region::ScopeTree,
span: Span,
origin: Option<SubregionOrigin<'tcx>>,
bound_kind: GenericKind<'tcx>,
sub: Region<'tcx>)
{
// Attempt to obtain the span of the parameter so we can
// suggest adding an explicit lifetime bound to it.
@ -953,9 +960,9 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
format!("the associated type `{}`", p),
};
if let SubregionOrigin::CompareImplMethodObligation {
if let Some(SubregionOrigin::CompareImplMethodObligation {
span, item_name, impl_item_def_id, trait_item_def_id,
} = origin {
}) = origin {
self.report_extra_impl_obligation(span,
item_name,
impl_item_def_id,
@ -990,7 +997,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
ty::ReFree(ty::FreeRegion {bound_region: ty::BrNamed(..), ..}) => {
// Does the required lifetime have a nice name we can print?
let mut err = struct_span_err!(self.tcx.sess,
origin.span(),
span,
E0309,
"{} may not live long enough",
labeled_user_string);
@ -1001,7 +1008,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
ty::ReStatic => {
// Does the required lifetime have a nice name we can print?
let mut err = struct_span_err!(self.tcx.sess,
origin.span(),
span,
E0310,
"{} may not live long enough",
labeled_user_string);
@ -1012,7 +1019,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
_ => {
// If not, be less specific.
let mut err = struct_span_err!(self.tcx.sess,
origin.span(),
span,
E0311,
"{} may not live long enough",
labeled_user_string);
@ -1028,7 +1035,9 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
}
};
self.note_region_origin(&mut err, &origin);
if let Some(origin) = origin {
self.note_region_origin(&mut err, &origin);
}
err.emit();
}