Translate transparent init list

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -3464,6 +3464,11 @@ bool Converter::VisitInitListExpr(clang::InitListExpr *expr) {
   if (auto form = expr->getSemanticForm())
     expr = form;
 
+  if (expr->isTransparent()) {
+    Convert(expr->getInit(0));
+    return false;
+  }
+
   auto qual_type = expr->getType();
   if (qual_type->isScalarType()) {
     assert(expr->getNumInits() < 2 && "Excess elements in scalar initializer");

cpp2rust/converter/models/converter_refcount.cpp

@@ -1840,6 +1840,11 @@ bool ConverterRefCount::VisitInitListExpr(clang::InitListExpr *expr) {
   if (auto form = expr->getSemanticForm())
     expr = form;
 
+  if (expr->isTransparent()) {
+    Convert(expr->getInit(0));
+    return false;
+  }
+
   auto qual_type = expr->getType();
   if (qual_type->isScalarType()) {
     PushConversionKind push(*this, ConversionKind::Unboxed);

tests/unit/init_list.cpp

@@ -1,9 +1,25 @@
 #include <array>
+#include <cassert>
 #include <initializer_list>
 #include <vector>
 
 void f(std::initializer_list<int> list) {}
 
+struct Pair {
+  int a;
+  int b;
+};
+
+struct Holder {
+  Pair p{0, 0};
+  Holder &operator=(Pair &&o) {
+    p = o;
+    return *this;
+  }
+};
+
+int sum(const Pair &p) { return p.a + p.b; }
+
 int main() {
   int i1{3};
   int i2{};
@@ -13,5 +29,11 @@ int main() {
   std::vector<int> vec = {1, 2, 3};
   f({1, 2, 3, 4});
 
+  Pair p{1, 2};
+  Holder h;
+  h = {std::move(p)};
+  assert(h.p.a == 1 && h.p.b == 2);
+  assert(sum({p}) == 3);
+
   return 0;
 }