diff options
| author | Brad Payne (Vir Linden) <vir@lindenlab.com> | 2021-03-16 16:18:56 +0100 |
|---|---|---|
| committer | Brad Payne (Vir Linden) <vir@lindenlab.com> | 2021-03-16 16:18:56 +0100 |
| commit | 60d62c767be3576cb674a817b90028951d6ee3b0 (patch) | |
| tree | a1b84be70f62dc13dca8ea141212270a49447ea5 /indra/newview/tests | |
| parent | 88d837c16e768c5262073a7df965066d4bd8842c (diff) | |
SL-14999 - cppfeatures test file for examples and compiler conformance verification
Diffstat (limited to 'indra/newview/tests')
| -rw-r--r-- | indra/newview/tests/cppfeatures_test.cpp | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/indra/newview/tests/cppfeatures_test.cpp b/indra/newview/tests/cppfeatures_test.cpp new file mode 100644 index 0000000000..15aa1cd6d6 --- /dev/null +++ b/indra/newview/tests/cppfeatures_test.cpp @@ -0,0 +1,127 @@ +/**
+ * @file cppfeatures_test
+ * @author Vir
+ * @date 2021-03
+ * @brief cpp features
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+// Tests related to newer C++ features, for verifying support across compilers and platforms
+
+#include "linden_common.h"
+#include "../test/lltut.h"
+
+namespace tut
+{
+
+struct cpp_features_test {};
+typedef test_group<cpp_features_test> cpp_features_test_t;
+typedef cpp_features_test_t::object cpp_features_test_object_t;
+tut::cpp_features_test_t tut_cpp_features_test("LLCPPFeatures");
+
+// bracket initializers
+// Can initialize containers or values using curly brackets
+template<> template<>
+void cpp_features_test_object_t::test<1>()
+{
+ S32 explicit_val{3};
+ ensure(explicit_val==3);
+
+ S32 default_val{};
+ ensure(default_val==0);
+
+ std::vector<S32> fibs{1,1,2,3,5};
+ ensure(fibs[4]==5);
+}
+
+// auto
+//
+// https://en.cppreference.com/w/cpp/language/auto
+//
+// Can use auto in place of a more complex type specification, if the compiler can infer the type
+template<> template<>
+void cpp_features_test_object_t::test<2>()
+{
+ std::vector<S32> numbers{3,6,9};
+
+ // auto element
+ auto& aval = numbers[1];
+ ensure("auto element", aval==6);
+
+ // auto iterator (non-const)
+ auto it = numbers.rbegin();
+ *it += 1;
+ S32 val = *it;
+ ensure("auto iterator", val==10);
+}
+
+// range for
+//
+// https://en.cppreference.com/w/cpp/language/range-for
+//
+// Can iterate over containers without explicit iterator
+template<> template<>
+void cpp_features_test_object_t::test<3>()
+{
+
+ // Traditional iterator for with container
+ //
+ // Problems:
+ // * Have to create a new variable for the iterator, which is unrelated to the problem you're trying to solve.
+ // * Redundant and somewhat fragile. Have to make sure begin() and end() are both from the right container.
+ std::vector<S32> numbers{3,6,9};
+ for (auto it = numbers.begin(); it != numbers.end(); ++it)
+ {
+ auto& n = *it;
+ n *= 2;
+ }
+ ensure("iterator for vector", numbers[2]==18);
+
+ // Range for with container
+ //
+ // Under the hood, this is doing the same thing as the traditional
+ // for loop above. Still uses begin() and end() but you don't have
+ // to access them directly.
+ std::vector<S32> numbersb{3,6,9};
+ for (auto& n: numbersb)
+ {
+ n *= 2;
+ }
+ ensure("range for vector", numbersb[2]==18);
+
+ // Range for over a C-style array.
+ //
+ // This is handy because the language determines the range automatically.
+ // Getting this right manually is a little trickier.
+ S32 pows[] = {1,2,4,8,16};
+ S32 sum{};
+ for (const auto& v: pows)
+ {
+ sum += v;
+ }
+ ensure("for C-array", sum==31);
+}
+
+
+
+}
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