intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 72 insertions, 0 deletions

diff --git a/util/system/compiler_ut.cpp b/util/system/compiler_ut.cpp
new file mode 100644
index 0000000000..f93b1c0850
--- /dev/null
+++ b/util/system/compiler_ut.cpp
@@ -0,0 +1,72 @@
+#include "compiler.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(TCompilerTest) {
+    Y_UNIT_TEST(TestPragmaNoWshadow) {
+        Y_PRAGMA_DIAGNOSTIC_PUSH
+        Y_PRAGMA_NO_WSHADOW
+
+        // define two variables with similar names, latest must shadow first
+        // and there will be no warning for this
+
+        for (int i = 0; i < 1; ++i) {
+            for (int i = 100500; i < 100501; ++i) {
+                UNIT_ASSERT_EQUAL(i, 100500);
+            }
+        }
+
+        Y_PRAGMA_DIAGNOSTIC_POP
+    }
+
+    Y_PRAGMA_DIAGNOSTIC_PUSH
+    Y_PRAGMA_NO_UNUSED_PARAMETER
+
+    // define function with unused named parameter
+    // and there will be no warning for this
+    int Foo(int a) {
+        return 0;
+    }
+
+    Y_PRAGMA_DIAGNOSTIC_POP
+
+    Y_UNIT_TEST(TestPragmaNoUnusedParameter) {
+        UNIT_ASSERT_EQUAL(Foo(1), 0);
+    }
+
+    Y_UNIT_TEST(TestHaveInt128) {
+#ifdef Y_HAVE_INT128
+        // will be compiled without errors
+        unsigned __int128 a = 1;
+        __int128 b = 1;
+        UNIT_ASSERT_EQUAL(a, 1);
+        UNIT_ASSERT_EQUAL(b, 1);
+        UNIT_ASSERT_EQUAL(sizeof(a), sizeof(b));
+
+        // and we can set a type alias for __int128 and unsigned __int128 without compiler errors
+        using TMyInt128 = __int128;
+        using TMyUnsignedInt128 = unsigned __int128;
+
+        TMyInt128 i128value;
+        TMyUnsignedInt128 ui128value;
+        Y_UNUSED(i128value);
+        Y_UNUSED(ui128value);
+
+#endif
+    }
+
+    // define deprecated function
+    [[deprecated]] void Bar() {
+        return;
+    }
+
+    Y_UNIT_TEST(TestNoDeprecated) {
+        Y_PRAGMA_DIAGNOSTIC_PUSH
+        Y_PRAGMA_NO_DEPRECATED
+
+        // will be compiled without errors
+        Bar();
+
+        Y_PRAGMA_DIAGNOSTIC_POP
+    }
+}