Files
json/tests/src/unit-conversions1.cpp
T
Niels Lohmann d8d47be4a5 Fix CI on develop after merging the ready-to-merge PRs (#5754)
* Keep the serializer conversion for objects whose keys cannot be converted

#5591 added a test converting nlohmann::json into a basic_json whose
string type cannot be constructed from std::string. That instantiates
convert_iteratively(), whose members.emplace_back(next.key(), ...) needs
exactly that key conversion, and broke the build of unit-alt-string.
Dispatch on the key's constructibility and leave such conversions to the
serializers, as the levels above the nesting bound already do (#3425).

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix the remaining CI failures on develop

- unit-wstring: with a 16-bit wchar_t (Windows), a lone surrogate is
  reported as the ill-formed byte 0xFF since #5704; the std::wstring
  expectations still had the previous <U+0000>.
- ci_single_binaries: json_literals.hpp (#5610) and json.hpp include each
  other on purpose, and IWYU, not following the cycle, asks to replace
  json.hpp with json_fwd.hpp. Report its findings without failing the
  build, as already done for json.hpp.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix the library warnings and noexcept specifications from the merged PRs

- binary_reader: rename the error_handler constructor parameter, which
  shadowed the member (-Wshadow, -Wshadow-field-in-constructor; #5746)
- basic_json(copy_construct_tag, ...): declare it noexcept when copying
  the base class is (GCC 16 -Wnoexcept; #5690)
- the scalar-on-left legacy comparison operators: noexcept only when
  converting the scalar is, like their member counterparts (#5682, #5751)
- compare_leaves: use std::is_eq/is_lt/is_gt instead of comparing a
  std::partial_ordering with 0 (-Wzero-as-null-pointer-constant; #5686)
- serializer: silence MSVC C4127 for the EnsureAscii template parameter
  (#5741, #5746)
- clang-tidy: return the sanitized reference in binary_writer, take the
  key of ordered_map::find_impl by const reference (#5727), and mark the
  switches over parse_array_index (#5728)
- ordered_map: keep <memory> for std::allocator (IWYU)

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Split unit-conversions.cpp so MinGW can link it

clang 18 with the MinGW linker failed to link test-conversions_cpp17
("relocation truncated to fit: IMAGE_REL_AMD64_REL32"). As windows.yml
recommends, keep the objects small by splitting the test file.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Fix the tests added by the merged PRs for all CI configurations

- discard the results of dump() and from_*() in CHECK_THROWS with
  utils::ignore_return_value (GCC -Werror=unused-result)
- give unit-bson's huge_string_t a default constructor (MSVC C2512,
  GCC 5, clang 3.5)
- unit-disabled_exceptions: use the literals namespace when the global
  UDLs are off (ci_test_noglobaludls; #5700)
- unit-binary_utf8_strict: expect the JSON pointer prefix with
  JSON_DIAGNOSTICS (#5741)
- skip the tests that rely on exceptions under JSON_NOEXCEPTION
  (#5678, #5732)
- clang-tidy and clang -Werror: static test data, CAPTURE(...);,
  const-correctness, use-after-move alias, unused conversion operator,
  a missing <iterator> include

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Title the macro examples and add JSON_STRICT_BINARY_UTF8 to the docset

The documentation style check requires "Example: ..." titles on pages with several examples (#5741, #5591) and a docset entry for every macro page.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* Regenerate BUILD.bazel and nlohmann_json.natvis

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

#5746 added detail/output/error_handler.hpp and #5741 the json_abi_sbu8 ABI tag.

* Install libidn11 for the CMake 3.5.0 binary in ci_cmake_flags

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

#5733 moved ci_cmake_options from ubuntu:focal to ubuntu:24.04, which no longer ships libidn.so.11; the CMake 3.5.0 release binary links against it, so every ci_cmake_flags run has failed since. Install focal's libidn11 package for that matrix entry only.

* Suppress Infer's false STACK_VARIABLE_ADDRESS_ESCAPE in get_impl

get_impl() returns its local by value. A test added by the merged PRs instantiates it with a type Infer misreads, so ci_infer reported the 2021 code for the first time.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-10-04 17:18:19 +02:00

1267 lines
40 KiB
C++

// __ _____ _____ _____
// __| | __| | | | JSON for Modern C++ (supporting code)
// | | |__ | | | | | | version 3.12.0
// |_____|_____|_____|_|___| https://github.com/nlohmann/json
//
// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
// SPDX-License-Identifier: MIT
// cmake/test.cmake selects the C++ standard versions with which to build a
// unit test based on the presence of JSON_HAS_CPP_<VERSION> macros.
// When using macros that are only defined for particular versions of the standard
// (e.g., JSON_HAS_FILESYSTEM for C++17 and up), please mention the corresponding
// version macro in a comment close by, like this:
// JSON_HAS_CPP_<VERSION> (do not remove; see note at top of file)
#include "doctest_compatibility.h"
#define JSON_TESTS_PRIVATE
#include <nlohmann/json.hpp>
using nlohmann::json;
#include <deque>
#include <forward_list>
#include <list>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <valarray>
// NLOHMANN_JSON_SERIALIZE_ENUM uses a static std::pair
DOCTEST_CLANG_SUPPRESS_WARNING_PUSH
DOCTEST_CLANG_SUPPRESS_WARNING("-Wexit-time-destructors")
#if (defined(__cplusplus) && __cplusplus >= 201703L) || (defined(_HAS_CXX17) && _HAS_CXX17 == 1) // fix for issue #464
#define JSON_HAS_CPP_17
#define JSON_HAS_CPP_14
#elif (defined(__cplusplus) && __cplusplus >= 201402L) || (defined(_HAS_CXX14) && _HAS_CXX14 == 1)
#define JSON_HAS_CPP_14
#endif
#ifdef JSON_HAS_CPP_17
#if __has_include(<optional>)
#include <optional>
#elif __has_include(<experimental/optional>)
#include <experimental/optional>
#endif
#endif
#if defined(JSON_HAS_CPP_17)
#include <string_view>
#endif
TEST_CASE("value conversion")
{
SECTION("get an object (explicit)")
{
const json::object_t o_reference = {{"object", json::object()},
{"array", {1, 2, 3, 4}},
{"number", 42},
{"boolean", false},
{"null", nullptr},
{"string", "Hello world"}
};
json j(o_reference);
SECTION("json::object_t")
{
json::object_t const o = j.get<json::object_t>();
CHECK(json(o) == j);
}
SECTION("std::map<json::string_t, json>")
{
const std::map<json::string_t, json> o =
j.get<std::map<json::string_t, json>>();
CHECK(json(o) == j);
}
SECTION("std::multimap<json::string_t, json>")
{
const std::multimap<json::string_t, json> o =
j.get<std::multimap<json::string_t, json>>();
CHECK(json(o) == j);
}
SECTION("std::unordered_map<json::string_t, json>")
{
const std::unordered_map<json::string_t, json> o =
j.get<std::unordered_map<json::string_t, json>>();
CHECK(json(o) == j);
}
SECTION("std::unordered_multimap<json::string_t, json>")
{
const std::unordered_multimap<json::string_t, json> o =
j.get<std::unordered_multimap<json::string_t, json>>();
CHECK(json(o) == j);
}
SECTION("exception in case of a non-object type")
{
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::array).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::string).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is string", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::boolean).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, "
"but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_integer).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_unsigned).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_float).get<json::object_t>(),
"[json.exception.type_error.302] type must be object, but is number", json::type_error&);
}
}
SECTION("get an object (explicit, get_to)")
{
const json::object_t o_reference = {{"object", json::object()},
{"array", {1, 2, 3, 4}},
{"number", 42},
{"boolean", false},
{"null", nullptr},
{"string", "Hello world"}
};
json j(o_reference);
SECTION("json::object_t")
{
json::object_t o = {{"previous", "value"}};
j.get_to(o);
CHECK(json(o) == j);
}
SECTION("std::map<json::string_t, json>")
{
std::map<json::string_t, json> o{{"previous", "value"}};
j.get_to(o);
CHECK(json(o) == j);
}
SECTION("std::multimap<json::string_t, json>")
{
std::multimap<json::string_t, json> o{{"previous", "value"}};
j.get_to(o);
CHECK(json(o) == j);
}
SECTION("std::unordered_map<json::string_t, json>")
{
std::unordered_map<json::string_t, json> o{{"previous", "value"}};
j.get_to(o);
CHECK(json(o) == j);
}
SECTION("std::unordered_multimap<json::string_t, json>")
{
std::unordered_multimap<json::string_t, json> o{{"previous", "value"}};
j.get_to(o);
CHECK(json(o) == j);
}
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get an object (implicit)")
{
const json::object_t o_reference = {{"object", json::object()},
{"array", {1, 2, 3, 4}},
{"number", 42},
{"boolean", false},
{"null", nullptr},
{"string", "Hello world"}
};
json j(o_reference);
SECTION("json::object_t")
{
const json::object_t o = j;
CHECK(json(o) == j);
}
SECTION("std::map<json::string_t, json>")
{
const std::map<json::string_t, json> o = j;
CHECK(json(o) == j);
}
SECTION("std::multimap<json::string_t, json>")
{
const std::multimap<json::string_t, json> o = j;
CHECK(json(o) == j);
}
SECTION("std::unordered_map<json::string_t, json>")
{
const std::unordered_map<json::string_t, json> o = j;
CHECK(json(o) == j);
}
SECTION("std::unordered_multimap<json::string_t, json>")
{
const std::unordered_multimap<json::string_t, json> o = j;
CHECK(json(o) == j);
}
}
#endif
SECTION("get an array (explicit)")
{
const json::array_t a_reference{json(1), json(1u), json(2.2),
json(false), json("string"), json()};
json j(a_reference);
SECTION("json::array_t")
{
const json::array_t a = j.get<json::array_t>();
CHECK(json(a) == j);
}
SECTION("std::list<json>")
{
const std::list<json> a = j.get<std::list<json>>();
CHECK(json(a) == j);
}
SECTION("std::forward_list<json>")
{
const std::forward_list<json> a = j.get<std::forward_list<json>>();
CHECK(json(a) == j);
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<std::forward_list<json>>(),
"[json.exception.type_error.302] type must be array, but is null", json::type_error&);
}
SECTION("std::vector<json>")
{
const std::vector<json> a = j.get<std::vector<json>>();
CHECK(json(a) == j);
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<std::vector<json>>(),
"[json.exception.type_error.302] type must be array, but is null", json::type_error&);
#if !defined(JSON_NOEXCEPTION)
SECTION("reserve is called on containers that supports it")
{
// make sure all values are properly copied
const json j2({1, 2, 3, 4, 5, 6, 7, 8, 9, 10});
auto v2 = j2.get<std::vector<int>>();
CHECK(v2.size() == 10);
}
#endif
}
SECTION("built-in arrays")
{
const char str[] = "a string"; // NOLINT(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const int nbs[] = {0, 1, 2}; // NOLINT(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
const json j3 = str;
auto v = j2.get<std::vector<int>>();
auto s = j3.get<std::string>();
CHECK(std::equal(v.begin(), v.end(), std::begin(nbs)));
CHECK(s == str);
}
SECTION("std::deque<json>")
{
const std::deque<json> a = j.get<std::deque<json>>();
CHECK(json(a) == j);
}
SECTION("exception in case of a non-array type")
{
CHECK_THROWS_WITH_AS(
json(json::value_t::object).get<std::vector<int>>(),
"[json.exception.type_error.302] type must be array, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::object).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::string).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is string", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::boolean).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_integer).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_unsigned).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_float).get<json::array_t>(),
"[json.exception.type_error.302] type must be array, but is number", json::type_error&);
}
}
SECTION("get an array (explicit, get_to)")
{
const json::array_t a_reference{json(1), json(1u), json(2.2),
json(false), json("string"), json()};
json j(a_reference);
SECTION("json::array_t")
{
json::array_t a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
SECTION("std::valarray<json>")
{
std::valarray<json> a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
SECTION("std::list<json>")
{
std::list<json> a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
SECTION("std::forward_list<json>")
{
std::forward_list<json> a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
SECTION("std::vector<json>")
{
std::vector<json> a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
SECTION("built-in arrays")
{
const int nbs[] = {0, 1, 2}; // NOLINT(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
int nbs2[] = {0, 0, 0}; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
j2.get_to(nbs2);
CHECK(std::equal(std::begin(nbs), std::end(nbs), std::begin(nbs2)));
}
SECTION("built-in arrays: 2D")
{
const int nbs[][3] = {{0, 1, 2}, {3, 4, 5}}; // NOLINT(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
int nbs2[][3] = {{0, 0, 0}, {0, 0, 0}}; // NOLINT(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
j2.get_to(nbs2);
CHECK(std::equal(std::begin(nbs[0]), std::end(nbs[1]), std::begin(nbs2[0])));
}
SECTION("built-in arrays: 3D")
{
// NOLINTBEGIN(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const int nbs[][2][3] = {\
{{0, 1, 2}, {3, 4, 5}}, \
{{10, 11, 12}, {13, 14, 15}}\
};
int nbs2[][2][3] = {\
{{0, 0, 0}, {0, 0, 0}}, \
{{0, 0, 0}, {0, 0, 0}}\
};
// NOLINTEND(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
j2.get_to(nbs2);
CHECK(std::equal(std::begin(nbs[0][0]), std::end(nbs[1][1]), std::begin(nbs2[0][0])));
}
SECTION("built-in arrays: 4D")
{
// NOLINTBEGIN(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const int nbs[][2][2][3] = {\
{
\
{{0, 1, 2}, {3, 4, 5}}, \
{{10, 11, 12}, {13, 14, 15}}\
}, \
{
\
{{20, 21, 22}, {23, 24, 25}}, \
{{30, 31, 32}, {33, 34, 35}}\
}\
};
int nbs2[][2][2][3] = {\
{
\
{{0, 0, 0}, {0, 0, 0}}, \
{{0, 0, 0}, {0, 0, 0}}\
}, \
{
\
{{0, 0, 0}, {0, 0, 0}}, \
{{0, 0, 0}, {0, 0, 0}}\
}\
};
// NOLINTEND(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
j2.get_to(nbs2);
CHECK(std::equal(std::begin(nbs[0][0][0]), std::end(nbs[1][1][1]), std::begin(nbs2[0][0][0])));
}
SECTION("built-in arrays: 5D")
{
// NOLINTBEGIN(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const int nbs[1][1][1][2][2] = {{{{{0, 1}, {2, 3}}}}};
int nbs2[1][1][1][2][2] = {{{{{0, 0}, {0, 0}}}}};
// NOLINTEND(misc-const-correctness,cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
const json j2 = nbs;
j2.get_to(nbs2);
CHECK(std::equal(std::begin(nbs[0][0][0][0]), std::end(nbs[0][0][0][1]), std::begin(nbs2[0][0][0][0])));
}
SECTION("built-in arrays: mismatched shape")
{
// NOLINTBEGIN(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
int nbs2[2][3] = {{0, 0, 0}, {0, 0, 0}};
// NOLINTEND(cppcoreguidelines-avoid-c-arrays,hicpp-avoid-c-arrays,modernize-avoid-c-arrays)
SECTION("not an array")
{
const json j2 = 42;
CHECK_THROWS_WITH_AS(j2.get_to(nbs2), "[json.exception.type_error.304] cannot use at() with number", json::type_error&);
}
SECTION("too few elements")
{
const json j2 = {{0, 1, 2}};
CHECK_THROWS_WITH_AS(j2.get_to(nbs2), "[json.exception.out_of_range.401] array index 1 is out of range", json::out_of_range&);
}
}
SECTION("std::deque<json>")
{
std::deque<json> a{"previous", "value"};
j.get_to(a);
CHECK(json(a) == j);
}
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get an array (implicit)")
{
const json::array_t a_reference{json(1), json(1u), json(2.2),
json(false), json("string"), json()};
json j(a_reference);
SECTION("json::array_t")
{
const json::array_t a = j;
CHECK(json(a) == j);
}
SECTION("std::list<json>")
{
const std::list<json> a = j;
CHECK(json(a) == j);
}
SECTION("std::forward_list<json>")
{
const std::forward_list<json> a = j;
CHECK(json(a) == j);
}
SECTION("std::vector<json>")
{
const std::vector<json> a = j;
CHECK(json(a) == j);
}
SECTION("std::deque<json>")
{
const std::deque<json> a = j;
CHECK(json(a) == j);
}
}
#endif
SECTION("get a string (explicit)")
{
const json::string_t s_reference{"Hello world"};
json j(s_reference);
SECTION("string_t")
{
const json::string_t s = j.get<json::string_t>();
CHECK(json(s) == j);
}
SECTION("std::string")
{
const std::string s = j.get<std::string>();
CHECK(json(s) == j);
}
#if defined(JSON_HAS_CPP_17)
SECTION("std::string_view")
{
std::string_view const s = j.get<std::string_view>();
CHECK(json(s) == j);
}
#endif
SECTION("exception in case of a non-string type")
{
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::object).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::array).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::boolean).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, "
"but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_integer).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_unsigned).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_float).get<json::string_t>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
}
#if defined(JSON_HAS_CPP_17)
SECTION("exception in case of a non-string type using string_view")
{
CHECK_THROWS_WITH_AS(json(json::value_t::null).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::object).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::array).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::boolean).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_integer).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_unsigned).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_float).get<std::string_view>(),
"[json.exception.type_error.302] type must be string, but is number", json::type_error&);
}
#endif
}
SECTION("get a string (explicit, get_to)")
{
const json::string_t s_reference{"Hello world"};
json j(s_reference);
SECTION("string_t")
{
json::string_t s = "previous value";
j.get_to(s);
CHECK(json(s) == j);
}
SECTION("std::string")
{
std::string s = "previous value";
j.get_to(s);
CHECK(json(s) == j);
}
#if defined(JSON_HAS_CPP_17)
SECTION("std::string_view")
{
std::string const s = "previous value";
std::string_view sv = s;
j.get_to(sv);
CHECK(json(sv) == j);
}
#endif
}
SECTION("get null (explicit)")
{
std::nullptr_t n = nullptr;
const json j(n);
auto n2 = j.get<std::nullptr_t>();
CHECK(n2 == n);
CHECK_THROWS_WITH_AS(json(json::value_t::string).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is string", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::object).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::array).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::boolean).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_integer).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_unsigned).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is number", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::number_float).get<std::nullptr_t>(),
"[json.exception.type_error.302] type must be null, but is number", json::type_error&);
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get a string (implicit)")
{
const json::string_t s_reference{"Hello world"};
json j(s_reference);
SECTION("string_t")
{
const json::string_t s = j;
CHECK(json(s) == j);
}
#if defined(JSON_HAS_CPP_17)
SECTION("std::string_view")
{
std::string_view const s = j.get<std::string_view>();
CHECK(json(s) == j);
}
#endif
SECTION("std::string")
{
const std::string s = j;
CHECK(json(s) == j);
}
}
#endif
SECTION("get a boolean (explicit)")
{
const json::boolean_t b_reference{true};
json j(b_reference);
SECTION("boolean_t")
{
auto b = j.get<json::boolean_t>();
CHECK(json(b) == j);
}
SECTION("uint8_t")
{
auto n = j.get<uint8_t>();
CHECK(n == 1);
}
SECTION("bool")
{
const bool b = j.get<bool>();
CHECK(json(b) == j);
}
SECTION("exception in case of a non-number type")
{
CHECK_THROWS_AS(json(json::value_t::string).get<uint8_t>(),
json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::object).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, "
"but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::array).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(json(json::value_t::string).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, "
"but is string", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_integer).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, but is "
"number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_unsigned).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, but is "
"number", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::number_float).get<json::boolean_t>(),
"[json.exception.type_error.302] type must be boolean, but is "
"number", json::type_error&);
}
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get a boolean (implicit)")
{
const json::boolean_t b_reference{true};
json j(b_reference);
SECTION("boolean_t")
{
const json::boolean_t b = j;
CHECK(json(b) == j);
}
SECTION("bool")
{
const bool b = j;
CHECK(json(b) == j);
}
}
#endif
SECTION("get an integer number (explicit)")
{
const json::number_integer_t n_reference{42};
json j(n_reference);
const json::number_unsigned_t n_unsigned_reference{42u};
json j_unsigned(n_unsigned_reference);
SECTION("number_integer_t")
{
auto n = j.get<json::number_integer_t>();
CHECK(json(n) == j);
}
SECTION("number_unsigned_t")
{
auto n = j_unsigned.get<json::number_unsigned_t>();
CHECK(json(n) == j_unsigned);
}
SECTION("short")
{
auto n = j.get<short>();
CHECK(json(n) == j);
}
SECTION("unsigned short")
{
auto n = j.get<unsigned short>();
CHECK(json(n) == j);
}
SECTION("int")
{
const int n = j.get<int>();
CHECK(json(n) == j);
}
SECTION("unsigned int")
{
auto n = j.get<unsigned int>();
CHECK(json(n) == j);
}
SECTION("long")
{
const long n = j.get<long>();
CHECK(json(n) == j);
}
SECTION("unsigned long")
{
auto n = j.get<unsigned long>();
CHECK(json(n) == j);
}
SECTION("long long")
{
auto n = j.get<long long>();
CHECK(json(n) == j);
}
SECTION("unsigned long long")
{
auto n = j.get<unsigned long long>();
CHECK(json(n) == j);
}
SECTION("int8_t")
{
auto n = j.get<int8_t>();
CHECK(json(n) == j);
}
SECTION("int16_t")
{
auto n = j.get<int16_t>();
CHECK(json(n) == j);
}
SECTION("int32_t")
{
auto n = j.get<int32_t>();
CHECK(json(n) == j);
}
SECTION("int64_t")
{
auto n = j.get<int64_t>();
CHECK(json(n) == j);
}
SECTION("int8_fast_t")
{
auto n = j.get<int_fast8_t>();
CHECK(json(n) == j);
}
SECTION("int16_fast_t")
{
auto n = j.get<int_fast16_t>();
CHECK(json(n) == j);
}
SECTION("int32_fast_t")
{
auto n = j.get<int_fast32_t>();
CHECK(json(n) == j);
}
SECTION("int64_fast_t")
{
auto n = j.get<int_fast64_t>();
CHECK(json(n) == j);
}
SECTION("int8_least_t")
{
auto n = j.get<int_least8_t>();
CHECK(json(n) == j);
}
SECTION("int16_least_t")
{
auto n = j.get<int_least16_t>();
CHECK(json(n) == j);
}
SECTION("int32_least_t")
{
auto n = j.get<int_least32_t>();
CHECK(json(n) == j);
}
SECTION("int64_least_t")
{
auto n = j.get<int_least64_t>();
CHECK(json(n) == j);
}
SECTION("uint8_t")
{
auto n = j.get<uint8_t>();
CHECK(json(n) == j);
}
SECTION("uint16_t")
{
auto n = j.get<uint16_t>();
CHECK(json(n) == j);
}
SECTION("uint32_t")
{
auto n = j.get<uint32_t>();
CHECK(json(n) == j);
}
SECTION("uint64_t")
{
auto n = j.get<uint64_t>();
CHECK(json(n) == j);
}
SECTION("uint8_fast_t")
{
auto n = j.get<uint_fast8_t>();
CHECK(json(n) == j);
}
SECTION("uint16_fast_t")
{
auto n = j.get<uint_fast16_t>();
CHECK(json(n) == j);
}
SECTION("uint32_fast_t")
{
auto n = j.get<uint_fast32_t>();
CHECK(json(n) == j);
}
SECTION("uint64_fast_t")
{
auto n = j.get<uint_fast64_t>();
CHECK(json(n) == j);
}
SECTION("uint8_least_t")
{
auto n = j.get<uint_least8_t>();
CHECK(json(n) == j);
}
SECTION("uint16_least_t")
{
auto n = j.get<uint_least16_t>();
CHECK(json(n) == j);
}
SECTION("uint32_least_t")
{
auto n = j.get<uint_least32_t>();
CHECK(json(n) == j);
}
SECTION("uint64_least_t")
{
auto n = j.get<uint_least64_t>();
CHECK(json(n) == j);
}
SECTION("exception in case of a non-number type")
{
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::number_integer_t>(),
"[json.exception.type_error.302] type must be number, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::object).get<json::number_integer_t>(),
"[json.exception.type_error.302] type must be number, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::array).get<json::number_integer_t>(),
"[json.exception.type_error.302] type must be number, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::string).get<json::number_integer_t>(),
"[json.exception.type_error.302] type must be number, but is string", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::boolean).get<json::number_integer_t>(),
"[json.exception.type_error.302] type must be number, but is "
"boolean", json::type_error&);
CHECK_NOTHROW(
json(json::value_t::number_float).get<json::number_integer_t>());
CHECK_NOTHROW(
json(json::value_t::number_float).get<json::number_unsigned_t>());
}
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get an integer number (implicit)")
{
json::number_integer_t const n_reference{42};
json j(n_reference);
json::number_unsigned_t const n_unsigned_reference{42u};
json j_unsigned(n_unsigned_reference);
SECTION("number_integer_t")
{
auto n = j.get<json::number_integer_t>();
CHECK(json(n) == j);
}
SECTION("number_unsigned_t")
{
auto n = j_unsigned.get<json::number_unsigned_t>();
CHECK(json(n) == j_unsigned);
}
SECTION("short")
{
short const n = j;
CHECK(json(n) == j);
}
SECTION("unsigned short")
{
unsigned short const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("int")
{
int const n = j;
CHECK(json(n) == j);
}
SECTION("unsigned int")
{
unsigned int const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("long")
{
long const n = j;
CHECK(json(n) == j);
}
SECTION("unsigned long")
{
unsigned long const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("long long")
{
long long const n = j;
CHECK(json(n) == j);
}
SECTION("unsigned long long")
{
unsigned long long const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("int8_t")
{
int8_t const n = j;
CHECK(json(n) == j);
}
SECTION("int16_t")
{
int16_t const n = j;
CHECK(json(n) == j);
}
SECTION("int32_t")
{
int32_t const n = j;
CHECK(json(n) == j);
}
SECTION("int64_t")
{
int64_t const n = j;
CHECK(json(n) == j);
}
SECTION("int8_fast_t")
{
int_fast8_t const n = j;
CHECK(json(n) == j);
}
SECTION("int16_fast_t")
{
int_fast16_t const n = j;
CHECK(json(n) == j);
}
SECTION("int32_fast_t")
{
int_fast32_t const n = j;
CHECK(json(n) == j);
}
SECTION("int64_fast_t")
{
int_fast64_t const n = j;
CHECK(json(n) == j);
}
SECTION("int8_least_t")
{
int_least8_t const n = j;
CHECK(json(n) == j);
}
SECTION("int16_least_t")
{
int_least16_t const n = j;
CHECK(json(n) == j);
}
SECTION("int32_least_t")
{
int_least32_t const n = j;
CHECK(json(n) == j);
}
SECTION("int64_least_t")
{
int_least64_t const n = j;
CHECK(json(n) == j);
}
SECTION("uint8_t")
{
uint8_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint16_t")
{
uint16_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint32_t")
{
uint32_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint64_t")
{
uint64_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint8_fast_t")
{
uint_fast8_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint16_fast_t")
{
uint_fast16_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint32_fast_t")
{
uint_fast32_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint64_fast_t")
{
uint_fast64_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint8_least_t")
{
uint_least8_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint16_least_t")
{
uint_least16_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint32_least_t")
{
uint_least32_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
SECTION("uint64_least_t")
{
uint_least64_t const n = j_unsigned;
CHECK(json(n) == j_unsigned);
}
}
#endif
SECTION("get a floating-point number (explicit)")
{
json::number_float_t const n_reference{42.23};
json const j(n_reference);
SECTION("number_float_t")
{
auto n = j.get<json::number_float_t>();
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
SECTION("float")
{
auto n = j.get<float>();
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
SECTION("double")
{
auto n = j.get<double>();
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
SECTION("exception in case of a non-string type")
{
CHECK_THROWS_WITH_AS(
json(json::value_t::null).get<json::number_float_t>(),
"[json.exception.type_error.302] type must be number, but is null", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::object).get<json::number_float_t>(),
"[json.exception.type_error.302] type must be number, but is object", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::array).get<json::number_float_t>(),
"[json.exception.type_error.302] type must be number, but is array", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::string).get<json::number_float_t>(),
"[json.exception.type_error.302] type must be number, but is string", json::type_error&);
CHECK_THROWS_WITH_AS(
json(json::value_t::boolean).get<json::number_float_t>(),
"[json.exception.type_error.302] type must be number, but is "
"boolean", json::type_error&);
CHECK_NOTHROW(
json(json::value_t::number_integer).get<json::number_float_t>());
CHECK_NOTHROW(
json(json::value_t::number_unsigned).get<json::number_float_t>());
}
}
#if JSON_USE_IMPLICIT_CONVERSIONS
SECTION("get a floating-point number (implicit)")
{
json::number_float_t const n_reference{42.23};
json const j(n_reference);
SECTION("number_float_t")
{
json::number_float_t const n = j;
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
SECTION("float")
{
float const n = j;
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
SECTION("double")
{
double const n = j;
CHECK(json(n).m_data.m_value.number_float == Approx(j.m_data.m_value.number_float));
}
}
#endif
}
#ifdef JSON_HAS_CPP_17
#undef JSON_HAS_CPP_17
#endif
#ifdef JSON_HAS_CPP_14
#undef JSON_HAS_CPP_14
#endif
DOCTEST_CLANG_SUPPRESS_WARNING_POP