Fix defeault arguments for constructor

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -3326,6 +3326,14 @@ void Converter::ConvertCXXConstructExprArgs(clang::CXXConstructExpr *expr) {
     auto param_type = param->getType();
     bool has_default = param->hasDefaultArg();
 
+    if (arg_idx < expr->getNumArgs() &&
+        clang::isa<clang::CXXDefaultArgExpr>(expr->getArg(arg_idx))) {
+      assert(has_default);
+      ++arg_idx;
+      StrCat("None", token::kComma);
+      continue;
+    }
+
     if (arg_idx < expr->getNumArgs()) {
       clang::Expr *arg = expr->getArg(arg_idx++);
       PushBrace brace(*this);

tests/unit/out/refcount/default_function_arguments.rs

@@ -76,13 +76,13 @@ fn main_0() -> i32 {
         }) as i32)
             == (true as i32))
     );
-    let b: Value<Bar> = Rc::new(RefCell::new(Bar::Bar({ Some() })));
+    let b: Value<Bar> = Rc::new(RefCell::new(Bar::Bar(None)));
     assert!(((*(*b.borrow()).v.borrow()) == 1));
     assert!(((*Bar::Bar({ Some(2) },).v.borrow()) == 2));
     let arr: Value<Box<[Bar]>> = Rc::new(RefCell::new(Box::new([
-        Bar::Bar({ Some() }),
-        Bar::Bar({ Some() }),
-        Bar::Bar({ Some() }),
+        Bar::Bar(None),
+        Bar::Bar(None),
+        Bar::Bar(None),
     ])));
     assert!(((*(*arr.borrow())[(0) as usize].v.borrow()) == 1));
     assert!(((*(*arr.borrow())[(2) as usize].v.borrow()) == 1));

tests/unit/out/unsafe/default_function_arguments.rs

@@ -49,14 +49,10 @@ unsafe fn main_0() -> i32 {
         }) as i32)
             == (true as i32))
     );
-    let mut b: Bar = Bar::Bar({ Some() });
+    let mut b: Bar = Bar::Bar(None);
     assert!(((b.v) == (1)));
     assert!(((Bar::Bar({ Some(2) },).v) == (2)));
-    let mut arr: [Bar; 3] = [
-        Bar::Bar({ Some() }),
-        Bar::Bar({ Some() }),
-        Bar::Bar({ Some() }),
-    ];
+    let mut arr: [Bar; 3] = [Bar::Bar(None), Bar::Bar(None), Bar::Bar(None)];
     assert!(((arr[(0) as usize].v) == (1)));
     assert!(((arr[(2) as usize].v) == (1)));
     return 0;