From 3491dc0acddf60eb8c9c8f8b3a67f4c9cdd53dbc Mon Sep 17 00:00:00 2001
From: Luc Grosheintz <luc.grosheintz@gmail.com>
Date: Tue, 20 Feb 2024 17:03:16 +0100
Subject: [PATCH] Allow default ctors.

---
 include/highfive/H5DataSet.hpp      |  2 +-
 tests/unit/tests_high_five_base.cpp | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/include/highfive/H5DataSet.hpp b/include/highfive/H5DataSet.hpp
index 4a582630b..566eb17ff 100644
--- a/include/highfive/H5DataSet.hpp
+++ b/include/highfive/H5DataSet.hpp
@@ -98,7 +98,7 @@ class DataSet: public Object,
         return details::get_plist<DataSetAccessProps>(*this, H5Dget_access_plist);
     }
 
-    DataSet() = delete;
+    DataSet() = default;
 
   protected:
     using Object::Object;  // bring DataSet(hid_t)
diff --git a/tests/unit/tests_high_five_base.cpp b/tests/unit/tests_high_five_base.cpp
index ca8df666a..f134634f0 100644
--- a/tests/unit/tests_high_five_base.cpp
+++ b/tests/unit/tests_high_five_base.cpp
@@ -312,6 +312,19 @@ TEST_CASE("Test allocation time") {
     CHECK(alloc_size == data.size() * sizeof(decltype(data)::value_type));
 }
 
+TEST_CASE("Test default constructors") {
+    const std::string file_name("h5_default_ctors.h5");
+    const std::string dataset_name("dset");
+    File file(file_name, File::Truncate);
+    auto ds = file.createDataSet(dataset_name, std::vector<int>{1, 2, 3, 4, 5});
+
+    DataSet d2;
+    CHECK_THROWS(d2.getFile());
+    CHECK(!d2.isValid());
+    d2 = ds;  // copy
+    CHECK(d2.isValid());
+}
+
 TEST_CASE("Test groups and datasets") {
     const std::string file_name("h5_group_test.h5");
     const std::string dataset_name("dset");