introduce FixedString::operator+(FixedString)

teslamotors · Jul 5, 2024 · 5f5045f · 5f5045f
1 parent 73fb715
commit 5f5045f
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diff --git a/include/fixed_containers/fixed_string.hpp b/include/fixed_containers/fixed_string.hpp
@@ -495,6 +495,14 @@ template <std::size_t MAXIMUM_LENGTH_WITH_NULL_TERMINATOR>
         list, loc);
 }
 
+template <std::size_t N, std::size_t M>
+constexpr FixedString<N + M> operator+(const FixedString<N>& a, const FixedString<M>& b)
+{
+    FixedString<N + M> result(a);
+    result.append(b);
+    return result;
+}
+
 }  // namespace fixed_containers
 
 // Specializations

diff --git a/test/fixed_string_test.cpp b/test/fixed_string_test.cpp
@@ -1582,6 +1582,11 @@ TEST(FixedStringTest, OStreamOperator)
     EXPECT_EQ(ss.str(), "hello");
 }
 
+TEST(FixedStringTest, PlusOperator)
+{
+    static_assert(make_fixed_string("hello world") == (make_fixed_string("hello ") + make_fixed_string("world")));
+}
+
 namespace
 {
 template <FixedString<5> /*MY_STR*/>