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json/tests/src/unit-conversions1.cpp
T
Niels LohmannandClaude Opus 5.5 bfe69c73c2 json_view: get<T>() of a boolean throws for the exact number types, as basic_json does (#5992) 
* json_view: get<T>() of a boolean throws for number_integer_t, number_unsigned_t and number_float_t like basic_json (#5988)

basic_json::get<T>() of a boolean throws type_error.302 for exactly
number_integer_t, number_unsigned_t and number_float_t (dedicated from_json()
overloads) and gives 0/1 for every other arithmetic type. The view returned
0/1 for all of them, contradicting its documentation. The view now throws
the same exception (same message, with path/bytes decoration) for these three
types. basic_json is unchanged; its behavior is documented and pinned by a test.

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

* tests: skip throwing json_view bool get<T>() combinations without exceptions (#5988)

check_boolean_get_parity() called get<T>() for number_integer_t,
number_unsigned_t and number_float_t in its JSON_NOEXCEPTION branch, but a
boolean throws type_error.302 for exactly these types, so JSON_THROW aborted
test-json_view_cpp11/cpp17 in ci_test_noexceptions. Skip these combinations
there; the throwing checks stay in the exceptions-enabled build.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasAgbDGG28MqXjQvLqp
Signed-off-by: Claude <noreply@anthropic.com>

* Expect the byte range of the root in the json_view boolean get<T>() test

With JSON_DIAGNOSTIC_POSITIONS, the type_error.302 message starts with
"(bytes 0-4)"; build the expected text with json_view_test::message(),
as the other tests of the root value do.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N5NasAgbDGG28MqXjQvLqp
Signed-off-by: Claude <noreply@anthropic.com>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
Signed-off-by: Claude <noreply@anthropic.com>
Co-authored-by: Claude <noreply@anthropic.com>
2026-11-02 17:48:43 +01:00

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// __ _____ _____ _____
// __| | __| | | | 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
TEST_CASE("get<T>() of a boolean (#5988)")
{
// a boolean converts to 0/1 for every arithmetic type except number_integer_t, number_unsigned_t and
// number_float_t, whose dedicated from_json() overloads throw
const json t = true;
const json f = false;
SECTION("0 and 1")
{
// long and unsigned long are left out: they are std::int64_t and std::uint64_t on some platforms
CHECK(t.get<bool>() == true);
CHECK(f.get<bool>() == false);
CHECK(t.get<char>() == 1);
CHECK(t.get<signed char>() == 1);
CHECK(t.get<unsigned char>() == 1);
CHECK(t.get<short>() == 1); // NOLINT(google-runtime-int)
CHECK(t.get<unsigned short>() == 1); // NOLINT(google-runtime-int)
CHECK(t.get<int>() == 1);
CHECK(t.get<unsigned>() == 1);
CHECK(t.get<float>() == 1.0F);
CHECK(t.get<long double>() == 1.0L);
CHECK(f.get<int>() == 0);
CHECK(f.get<float>() == 0.0F);
}
#if !defined(JSON_NOEXCEPTION)
SECTION("number_integer_t, number_unsigned_t and number_float_t throw")
{
CHECK_THROWS_WITH_AS(t.get<json::number_integer_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(t.get<json::number_unsigned_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(t.get<json::number_float_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(f.get<json::number_integer_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(f.get<json::number_unsigned_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
CHECK_THROWS_WITH_AS(f.get<json::number_float_t>(), "[json.exception.type_error.302] type must be number, but is boolean", json::type_error&);
}
#endif
}
#ifdef JSON_HAS_CPP_14
#undef JSON_HAS_CPP_14
#endif
DOCTEST_CLANG_SUPPRESS_WARNING_POP
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