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Niels Lohmann
+38
-48
@@ -11,18 +11,18 @@
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#include <nlohmann/json.hpp>
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using nlohmann::json;
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#ifdef JSON_TEST_NO_GLOBAL_UDLS
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using namespace nlohmann::literals; // NOLINT(google-build-using-namespace)
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using namespace nlohmann::literals; // NOLINT(google-build-using-namespace)
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#endif
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#include <deque>
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#include <forward_list>
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#include <iomanip>
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#include <iostream>
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#include <list>
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#include <set>
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#include <sstream>
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#include <unordered_map>
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#include <unordered_set>
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#include <iostream>
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#include <sstream>
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#include <iomanip>
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// local variable is initialized but not referenced
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DOCTEST_MSVC_SUPPRESS_WARNING_PUSH
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@@ -55,31 +55,21 @@ TEST_CASE("README" * doctest::skip())
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j["answer"]["everything"] = 42;
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// add an array that is stored as std::vector (using an initializer list)
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j["list"] = { 1, 0, 2 };
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j["list"] = {1, 0, 2};
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// add another object (using an initializer list of pairs)
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j["object"] = { {"currency", "USD"}, {"value", 42.99} };
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j["object"] = {{"currency", "USD"}, {"value", 42.99}};
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// instead, you could also write (which looks very similar to the JSON above)
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json const j2 =
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{
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{"pi", 3.141},
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{"happy", true},
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{"name", "Niels"},
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{"nothing", nullptr},
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{
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"answer", {
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{"everything", 42}
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}
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},
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{"list", {1, 0, 2}},
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{
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"object", {
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{"currency", "USD"},
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{"value", 42.99}
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}
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}
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};
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{"pi", 3.141},
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{"happy", true},
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{"name", "Niels"},
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{"nothing", nullptr},
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{"answer", {{"everything", 42}}},
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{"list", {1, 0, 2}},
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{"object", {{"currency", "USD"}, {"value", 42.99}}}};
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}
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{
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@@ -94,7 +84,7 @@ TEST_CASE("README" * doctest::skip())
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CHECK(empty_object_explicit.is_object());
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// a way to express an _array_ of key/value pairs [["currency", "USD"], ["value", 42.99]]
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json array_not_object = json::array({ {"currency", "USD"}, {"value", 42.99} });
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json array_not_object = json::array({{"currency", "USD"}, {"value", 42.99}});
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CHECK(array_not_object.is_array());
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CHECK(array_not_object.size() == 2);
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CHECK(array_not_object[0].is_array());
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@@ -103,7 +93,7 @@ TEST_CASE("README" * doctest::skip())
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{
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// create object from string literal
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json const j = "{ \"happy\": true, \"pi\": 3.141 }"_json; // NOLINT(modernize-raw-string-literal)
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json const j = "{ \"happy\": true, \"pi\": 3.141 }"_json; // NOLINT(modernize-raw-string-literal)
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// or even nicer with a raw string literal
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auto j2 = R"({
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@@ -115,17 +105,17 @@ TEST_CASE("README" * doctest::skip())
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auto j3 = json::parse(R"({"happy": true, "pi": 3.141})");
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// explicit conversion to string
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std::string const s = j.dump(); // {\"happy\":true,\"pi\":3.141}
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std::string const s = j.dump(); // {\"happy\":true,\"pi\":3.141}
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// serialization with pretty printing
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// pass in the amount of spaces to indent
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std::cout << j.dump(4) << std::endl; // NOLINT(performance-avoid-endl)
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std::cout << j.dump(4) << std::endl; // NOLINT(performance-avoid-endl)
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// {
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// "happy": true,
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// "pi": 3.141
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// }
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std::cout << std::setw(2) << j << std::endl; // NOLINT(performance-avoid-endl)
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std::cout << std::setw(2) << j << std::endl; // NOLINT(performance-avoid-endl)
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}
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{
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@@ -140,7 +130,7 @@ TEST_CASE("README" * doctest::skip())
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CHECK(x == true);
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// iterate the array
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for (json::iterator it = j.begin(); it != j.end(); ++it) // NOLINT(modernize-loop-convert)
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for (json::iterator it = j.begin(); it != j.end(); ++it) // NOLINT(modernize-loop-convert)
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{
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std::cout << *it << '\n';
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}
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@@ -178,58 +168,58 @@ TEST_CASE("README" * doctest::skip())
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}
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{
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std::vector<int> const c_vector {1, 2, 3, 4};
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std::vector<int> const c_vector{1, 2, 3, 4};
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json const j_vec(c_vector);
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// [1, 2, 3, 4]
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std::deque<float> const c_deque {1.2f, 2.3f, 3.4f, 5.6f};
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std::deque<float> const c_deque{1.2f, 2.3f, 3.4f, 5.6f};
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json const j_deque(c_deque);
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// [1.2, 2.3, 3.4, 5.6]
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std::list<bool> const c_list {true, true, false, true};
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std::list<bool> const c_list{true, true, false, true};
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json const j_list(c_list);
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// [true, true, false, true]
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std::forward_list<int64_t> const c_flist {12345678909876, 23456789098765, 34567890987654, 45678909876543};
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std::forward_list<int64_t> const c_flist{12345678909876, 23456789098765, 34567890987654, 45678909876543};
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json const j_flist(c_flist);
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// [12345678909876, 23456789098765, 34567890987654, 45678909876543]
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std::array<unsigned long, 4> const c_array {{1, 2, 3, 4}};
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std::array<unsigned long, 4> const c_array{{1, 2, 3, 4}};
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json const j_array(c_array);
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// [1, 2, 3, 4]
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std::set<std::string> const c_set {"one", "two", "three", "four", "one"};
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json const j_set(c_set); // only one entry for "one" is used
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std::set<std::string> const c_set{"one", "two", "three", "four", "one"};
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json const j_set(c_set); // only one entry for "one" is used
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// ["four", "one", "three", "two"]
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std::unordered_set<std::string> const c_uset {"one", "two", "three", "four", "one"};
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json const j_uset(c_uset); // only one entry for "one" is used
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std::unordered_set<std::string> const c_uset{"one", "two", "three", "four", "one"};
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json const j_uset(c_uset); // only one entry for "one" is used
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// maybe ["two", "three", "four", "one"]
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std::multiset<std::string> const c_mset {"one", "two", "one", "four"};
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json const j_mset(c_mset); // both entries for "one" are used
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std::multiset<std::string> const c_mset{"one", "two", "one", "four"};
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json const j_mset(c_mset); // both entries for "one" are used
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// maybe ["one", "two", "one", "four"]
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std::unordered_multiset<std::string> const c_umset {"one", "two", "one", "four"};
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json const j_umset(c_umset); // both entries for "one" are used
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std::unordered_multiset<std::string> const c_umset{"one", "two", "one", "four"};
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json const j_umset(c_umset); // both entries for "one" are used
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// maybe ["one", "two", "one", "four"]
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}
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{
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std::map<std::string, int> const c_map { {"one", 1}, {"two", 2}, {"three", 3} };
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std::map<std::string, int> const c_map{{"one", 1}, {"two", 2}, {"three", 3}};
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json const j_map(c_map);
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// {"one": 1, "two": 2, "three": 3}
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std::unordered_map<const char*, float> const c_umap { {"one", 1.2f}, {"two", 2.3f}, {"three", 3.4f} };
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std::unordered_map<const char*, float> const c_umap{{"one", 1.2f}, {"two", 2.3f}, {"three", 3.4f}};
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json const j_umap(c_umap);
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// {"one": 1.2, "two": 2.3, "three": 3.4}
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std::multimap<std::string, bool> const c_mmap { {"one", true}, {"two", true}, {"three", false}, {"three", true} };
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json const j_mmap(c_mmap); // only one entry for key "three" is used
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std::multimap<std::string, bool> const c_mmap{{"one", true}, {"two", true}, {"three", false}, {"three", true}};
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json const j_mmap(c_mmap); // only one entry for key "three" is used
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// maybe {"one": true, "two": true, "three": true}
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std::unordered_multimap<std::string, bool> const c_ummap { {"one", true}, {"two", true}, {"three", false}, {"three", true} };
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json const j_ummap(c_ummap); // only one entry for key "three" is used
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std::unordered_multimap<std::string, bool> const c_ummap{{"one", true}, {"two", true}, {"three", false}, {"three", true}};
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json const j_ummap(c_ummap); // only one entry for key "three" is used
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// maybe {"one": true, "two": true, "three": true}
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}
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