Skip to content

be more robust to bogus items in struct patterns/constructors #27833

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Aug 17, 2015
Merged

be more robust to bogus items in struct patterns/constructors #27833

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
b87c292
be more robust to bogus items in struct patterns/constructors
arielb1 Aug 14, 2015
ba98228
clean-up ExprStruct and PatStruct type-checking
arielb1 Aug 15, 2015
91be125
prevent non-dict-structs from being intialized via FRU
arielb1 Aug 15, 2015
44f4106
use the correct substs when checking struct patterns
arielb1 Aug 15, 2015
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
57 changes: 14 additions & 43 deletions src/librustc_typeck/check/_match.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -528,60 +528,31 @@ pub fn check_pat_struct<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>, pat: &'tcx ast::Pat,
let tcx = pcx.fcx.ccx.tcx;

let def = tcx.def_map.borrow().get(&pat.id).unwrap().full_def();
let (adt_def, variant) = match def {
def::DefTrait(_) => {
let variant = match fcx.def_struct_variant(def) {
Some((_, variant)) => variant,
None => {
let name = pprust::path_to_string(path);
span_err!(tcx.sess, pat.span, E0168,
"use of trait `{}` in a struct pattern", name);
span_err!(tcx.sess, pat.span, E0163,
"`{}` does not name a struct or a struct variant", name);
fcx.write_error(pat.id);

for field in fields {
check_pat(pcx, &*field.node.pat, tcx.types.err);
check_pat(pcx, &field.node.pat, tcx.types.err);
}
return;
},
_ => {
let def_type = tcx.lookup_item_type(def.def_id());
match def_type.ty.sty {
ty::TyStruct(struct_def, _) =>
(struct_def, struct_def.struct_variant()),
ty::TyEnum(enum_def, _)
if def == def::DefVariant(enum_def.did, def.def_id(), true) =>
(enum_def, enum_def.variant_of_def(def)),
_ => {
let name = pprust::path_to_string(path);
span_err!(tcx.sess, pat.span, E0163,
"`{}` does not name a struct or a struct variant", name);
fcx.write_error(pat.id);

for field in fields {
check_pat(pcx, &*field.node.pat, tcx.types.err);
}
return;
}
}
}
};

instantiate_path(pcx.fcx,
&path.segments,
adt_def.type_scheme(tcx),
&adt_def.predicates(tcx),
None,
def,
pat.span,
pat.id);

let pat_ty = fcx.node_ty(pat.id);
let pat_ty = pcx.fcx.instantiate_type(def.def_id(), path);
let item_substs = match pat_ty.sty {
ty::TyStruct(_, substs) | ty::TyEnum(_, substs) => substs,
_ => tcx.sess.span_bug(pat.span, "struct variant is not an ADT")
};
demand::eqtype(fcx, pat.span, expected, pat_ty);

let item_substs = fcx
.item_substs()
.get(&pat.id)
.map(|substs| substs.substs.clone())
.unwrap_or_else(|| Substs::empty());

check_struct_pat_fields(pcx, pat.span, fields, variant, &item_substs, etc);

fcx.write_ty(pat.id, pat_ty);
fcx.write_substs(pat.id, ty::ItemSubsts { substs: item_substs.clone() });
}

pub fn check_pat_enum<'a, 'tcx>(pcx: &pat_ctxt<'a, 'tcx>,
Expand Down
Loading