[COMMITTED 041/146] gccrs: Use default constructor for default arguments

[arthur.cohen@embecosm.com]

From: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

GCC 4.8 complains about the initializer list.

gcc/rust/ChangeLog:

	* typecheck/rust-tyty.h: Change initializer list to default constructor
	call.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
---
 gcc/rust/typecheck/rust-tyty.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/typecheck/rust-tyty.h b/gcc/rust/typecheck/rust-tyty.h
index 94f7bce00f8..49cd00c9174 100644
--- a/gcc/rust/typecheck/rust-tyty.h
+++ b/gcc/rust/typecheck/rust-tyty.h
@@ -657,7 +657,7 @@ public:
 	   std::vector<SubstitutionParamMapping> subst_refs,
 	   SubstitutionArgumentMappings generic_arguments
 	   = SubstitutionArgumentMappings::error (),
-	   RegionConstraints region_constraints = {},
+	   RegionConstraints region_constraints = RegionConstraints{},
 	   std::set<HirId> refs = std::set<HirId> ())
     : BaseType (ref, ref, TypeKind::ADT, ident, refs),
       SubstitutionRef (std::move (subst_refs), std::move (generic_arguments),
@@ -670,7 +670,7 @@ public:
 	   std::vector<SubstitutionParamMapping> subst_refs,
 	   SubstitutionArgumentMappings generic_arguments
 	   = SubstitutionArgumentMappings::error (),
-	   RegionConstraints region_constraints = {},
+	   RegionConstraints region_constraints = RegionConstraints{},
 	   std::set<HirId> refs = std::set<HirId> ())
     : BaseType (ref, ty_ref, TypeKind::ADT, ident, refs),
       SubstitutionRef (std::move (subst_refs), std::move (generic_arguments),
@@ -683,7 +683,7 @@ public:
 	   std::vector<SubstitutionParamMapping> subst_refs, ReprOptions repr,
 	   SubstitutionArgumentMappings generic_arguments
 	   = SubstitutionArgumentMappings::error (),
-	   RegionConstraints region_constraints = {},
+	   RegionConstraints region_constraints = RegionConstraints{},
 	   std::set<HirId> refs = std::set<HirId> ())
     : BaseType (ref, ty_ref, TypeKind::ADT, ident, refs),
       SubstitutionRef (std::move (subst_refs), std::move (generic_arguments),
-- 
2.45.2