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Test the C++11 stand-in for std::string_view of json_view

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Six members of string_ref (length, begin, end, operator[], operator!=,
and operator<<) were not reached before C++17, where string_ref is
std::string_view.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
This commit is contained in:
Niels Lohmann
2026-09-29 09:53:48 +02:00
parent a49d6e2e3b
commit 27468fa77e
1 changed files with 17 additions and 0 deletions
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tests/src/unit-json_view_builder.cpp
+17
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@@ -10,6 +10,7 @@
#include <nlohmann/json.hpp>
#include <nlohmann/detail/view/builder.hpp>
#include <nlohmann/detail/view/string_ref.hpp>
using nlohmann::json;
#include <cstdint>
@@ -214,6 +215,22 @@ struct generator
};
} // namespace
TEST_CASE("json_view string_ref")
{
// std::string_view in C++17, a stand-in with the same members before
using nlohmann::detail::view::string_ref;
const std::string text = "abc";
const string_ref r(text);
CHECK(r.length() == 3);
CHECK(std::string(r.begin(), r.end()) == "abc");
CHECK(r[1] == 'b');
CHECK(r != string_ref("abd"));
CHECK_FALSE(r != string_ref("abcd", 3));
std::ostringstream o;
o << r;
CHECK(o.str() == "abc");
}
TEST_CASE("json_view builder")
{
SECTION("scalars and containers")