Read the is_variadic attribute on the other side

Author: lucic71

cpp2rust/converter/converter.cpp

@@ -1447,6 +1447,13 @@ bool Converter::VisitCallExpr(clang::CallExpr *expr) {
   }
 
   if (Mapper::Contains(expr->getCallee())) {
+    if (auto tgt_ir = Mapper::GetExprRule(GetCalleeOrExpr(expr))) {
+      if (tgt_ir->body.empty() && tgt_ir->is_variadic) {
+        ConvertGenericCallExpr(expr);
+        return false;
+      }
+    }
+
     auto **args = expr->getArgs();
     auto num_args = expr->getNumArgs();
     auto ctx = CollectPrvalueToLRefArgs(expr);

cpp2rust/converter/translation_rule.cpp

@@ -104,6 +104,9 @@ ExprRule ParseExprRuleJSON(const llvm::json::Object &obj) {
   if (auto ms = obj.getBoolean("multi_statement"))
     ir.multi_statement = *ms;
 
+  if (auto v = obj.getBoolean("is_variadic"))
+    ir.is_variadic = *v;
+
   if (auto *generics = obj.getObject("generics")) {
     for (auto &[key, val] : *generics) {
       if (auto *arr = val.getAsArray()) {

cpp2rust/converter/translation_rule.h

@@ -70,6 +70,7 @@ struct ExprRule {
   std::vector<std::vector<std::string>> generics; // "T1" -> ["Ord", "Clone"]
   std::vector<BodyFragment> body;
   bool multi_statement = false;
+  bool is_variadic = false;
 
   void dump() const;
   void validate(const std::string &name) const;