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constructor for an integer range

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This commit is contained in:
Niels 2015-04-12 13:15:26 +02:00
parent b801adca76
commit ade49f8b2a
3 changed files with 432 additions and 1 deletions
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89
src/json.hpp
View File

@ -587,6 +587,95 @@ class basic_json
alloc.construct(m_value.array, count, other); alloc.construct(m_value.array, count, other);
} }
// construct a JSON container given an iterator range
template <class T, typename
std::enable_if<
std::is_same<T, basic_json::iterator>::value or
std::is_same<T, basic_json::const_iterator>::value
, int>::type
= 0>
inline basic_json(T first, T last)
{
// make sure iterator fits the current value
if (first.m_object != last.m_object or
first.m_object->m_type != last.m_object->m_type)
{
throw std::runtime_error("iterators are not compatible");
}
m_type = first.m_object->m_type;
switch (m_type)
{
case value_t::number_integer:
case value_t::number_float:
case value_t::boolean:
case value_t::string:
{
if (first.m_it.generic_iterator != 0 or last.m_it.generic_iterator != 1)
{
throw std::out_of_range("iterators out of range");
}
break;
}
default:
{
break;
}
}
switch (m_type)
{
case value_t::number_integer:
{
m_value.number_integer = first.m_object->m_value.number_integer;
break;
}
case value_t::number_float:
{
m_value.number_float = first.m_object->m_value.number_float;
break;
}
case value_t::boolean:
{
m_value.boolean = first.m_object->m_value.boolean;
break;
}
case value_t::string:
{
AllocatorType<string_t> alloc;
m_value.string = alloc.allocate(1);
alloc.construct(m_value.string, *first.m_object->m_value.string);
break;
}
case value_t::object:
{
AllocatorType<object_t> alloc;
m_value.object = alloc.allocate(1);
alloc.construct(m_value.object, first.m_it.object_iterator, last.m_it.object_iterator);
break;
}
case value_t::array:
{
AllocatorType<array_t> alloc;
m_value.array = alloc.allocate(1);
alloc.construct(m_value.array, first.m_it.array_iterator, last.m_it.array_iterator);
break;
}
default:
{
throw std::runtime_error("cannot use construct with iterators from " + first.m_object->type_name());
}
}
}
/////////////////////////////////////// ///////////////////////////////////////
// other constructors and destructor // // other constructors and destructor //
/////////////////////////////////////// ///////////////////////////////////////

91
src/json.hpp.re2c
View File

@ -587,6 +587,97 @@ class basic_json
alloc.construct(m_value.array, count, other); alloc.construct(m_value.array, count, other);
} }
/// construct a JSON container given an iterator range
template <class T, typename
std::enable_if<
std::is_same<T, basic_json::iterator>::value or
std::is_same<T, basic_json::const_iterator>::value
, int>::type
= 0>
inline basic_json(T first, T last)
{
// make sure iterator fits the current value
if (first.m_object != last.m_object or
first.m_object->m_type != last.m_object->m_type)
{
throw std::runtime_error("iterators are not compatible");
}
// set the type
m_type = first.m_object->m_type;
// check if iterator range is complete for non-compound values
switch (m_type)
{
case value_t::number_integer:
case value_t::number_float:
case value_t::boolean:
case value_t::string:
{
if (first.m_it.generic_iterator != 0 or last.m_it.generic_iterator != 1)
{
throw std::out_of_range("iterators out of range");
}
break;
}
default:
{
break;
}
}
switch (m_type)
{
case value_t::number_integer:
{
m_value.number_integer = first.m_object->m_value.number_integer;
break;
}
case value_t::number_float:
{
m_value.number_float = first.m_object->m_value.number_float;
break;
}
case value_t::boolean:
{
m_value.boolean = first.m_object->m_value.boolean;
break;
}
case value_t::string:
{
AllocatorType<string_t> alloc;
m_value.string = alloc.allocate(1);
alloc.construct(m_value.string, *first.m_object->m_value.string);
break;
}
case value_t::object:
{
AllocatorType<object_t> alloc;
m_value.object = alloc.allocate(1);
alloc.construct(m_value.object, first.m_it.object_iterator, last.m_it.object_iterator);
break;
}
case value_t::array:
{
AllocatorType<array_t> alloc;
m_value.array = alloc.allocate(1);
alloc.construct(m_value.array, first.m_it.array_iterator, last.m_it.array_iterator);
break;
}
default:
{
throw std::runtime_error("cannot use construct with iterators from " + first.m_object->type_name());
}
}
}
/////////////////////////////////////// ///////////////////////////////////////
// other constructors and destructor // // other constructors and destructor //
/////////////////////////////////////// ///////////////////////////////////////

253
test/unit.cpp
View File

@ -913,6 +913,257 @@ TEST_CASE("constructors")
CHECK(x == v); CHECK(x == v);
} }
} }
SECTION("create a JSON container from an iterator range")
{
SECTION("object")
{
SECTION("json(begin(), end())")
{
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}};
json j_new(jobject.begin(), jobject.end());
CHECK(j_new == jobject);
}
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}};
json j_new(jobject.cbegin(), jobject.cend());
CHECK(j_new == jobject);
}
}
SECTION("json(begin(), begin())")
{
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}};
json j_new(jobject.begin(), jobject.begin());
CHECK(j_new == json::object());
}
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}};
json j_new(jobject.cbegin(), jobject.cbegin());
CHECK(j_new == json::object());
}
}
SECTION("construct from subrange")
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}, {"d", false}, {"e", true}};
json j_new(jobject.find("b"), jobject.find("e"));
CHECK(j_new == json({{"b", 1}, {"c", 17}, {"d", false}}));
}
SECTION("incompatible iterators")
{
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}, {"d", false}, {"e", true}};
json jobject2 = {{"a", "a"}, {"b", 1}, {"c", 17}};
CHECK_THROWS_AS(json(jobject.begin(), jobject2.end()), std::runtime_error);
CHECK_THROWS_AS(json(jobject2.begin(), jobject.end()), std::runtime_error);
}
{
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}, {"d", false}, {"e", true}};
json jobject2 = {{"a", "a"}, {"b", 1}, {"c", 17}};
CHECK_THROWS_AS(json(jobject.cbegin(), jobject2.cend()), std::runtime_error);
CHECK_THROWS_AS(json(jobject2.cbegin(), jobject.cend()), std::runtime_error);
}
}
}
SECTION("array")
{
SECTION("json(begin(), end())")
{
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.begin(), jarray.end());
CHECK(j_new == jarray);
}
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.cbegin(), jarray.cend());
CHECK(j_new == jarray);
}
}
SECTION("json(begin(), begin())")
{
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.begin(), jarray.begin());
CHECK(j_new == json::array());
}
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.cbegin(), jarray.cbegin());
CHECK(j_new == json::array());
}
}
SECTION("construct from subrange")
{
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.begin() + 1, jarray.begin() + 3);
CHECK(j_new == json({2, 3}));
}
{
json jarray = {1, 2, 3, 4, 5};
json j_new(jarray.cbegin() + 1, jarray.cbegin() + 3);
CHECK(j_new == json({2, 3}));
}
}
SECTION("incompatible iterators")
{
{
json jarray = {1, 2, 3, 4};
json jarray2 = {2, 3, 4, 5};
CHECK_THROWS_AS(json(jarray.begin(), jarray2.end()), std::runtime_error);
CHECK_THROWS_AS(json(jarray2.begin(), jarray.end()), std::runtime_error);
}
{
json jarray = {1, 2, 3, 4};
json jarray2 = {2, 3, 4, 5};
CHECK_THROWS_AS(json(jarray.cbegin(), jarray2.cend()), std::runtime_error);
CHECK_THROWS_AS(json(jarray2.cbegin(), jarray.cend()), std::runtime_error);
}
}
}
SECTION("other values")
{
SECTION("construct with two valid iterators")
{
SECTION("null")
{
{
json j;
CHECK_THROWS_AS(json(j.begin(), j.end()), std::runtime_error);
}
{
json j;
CHECK_THROWS_AS(json(j.cbegin(), j.cend()), std::runtime_error);
}
}
SECTION("string")
{
{
json j = "foo";
json j_new(j.begin(), j.end());
CHECK(j == j_new);
}
{
json j = "bar";
json j_new(j.cbegin(), j.cend());
CHECK(j == j_new);
}
}
SECTION("number (boolean)")
{
{
json j = false;
json j_new(j.begin(), j.end());
CHECK(j == j_new);
}
{
json j = true;
json j_new(j.cbegin(), j.cend());
CHECK(j == j_new);
}
}
SECTION("number (integer)")
{
{
json j = 17;
json j_new(j.begin(), j.end());
CHECK(j == j_new);
}
{
json j = 17;
json j_new(j.cbegin(), j.cend());
CHECK(j == j_new);
}
}
SECTION("number (floating point)")
{
{
json j = 23.42;
json j_new(j.begin(), j.end());
CHECK(j == j_new);
}
{
json j = 23.42;
json j_new(j.cbegin(), j.cend());
CHECK(j == j_new);
}
}
}
SECTION("construct with two invalid iterators")
{
SECTION("string")
{
{
json j = "foo";
CHECK_THROWS_AS(json(j.end(), j.end()), std::out_of_range);
CHECK_THROWS_AS(json(j.begin(), j.begin()), std::out_of_range);
}
{
json j = "bar";
CHECK_THROWS_AS(json(j.cend(), j.cend()), std::out_of_range);
CHECK_THROWS_AS(json(j.cbegin(), j.cbegin()), std::out_of_range);
}
}
SECTION("number (boolean)")
{
{
json j = false;
CHECK_THROWS_AS(json(j.end(), j.end()), std::out_of_range);
CHECK_THROWS_AS(json(j.begin(), j.begin()), std::out_of_range);
}
{
json j = true;
CHECK_THROWS_AS(json(j.cend(), j.cend()), std::out_of_range);
CHECK_THROWS_AS(json(j.cbegin(), j.cbegin()), std::out_of_range);
}
}
SECTION("number (integer)")
{
{
json j = 17;
CHECK_THROWS_AS(json(j.end(), j.end()), std::out_of_range);
CHECK_THROWS_AS(json(j.begin(), j.begin()), std::out_of_range);
}
{
json j = 17;
CHECK_THROWS_AS(json(j.cend(), j.cend()), std::out_of_range);
CHECK_THROWS_AS(json(j.cbegin(), j.cbegin()), std::out_of_range);
}
}
SECTION("number (floating point)")
{
{
json j = 23.42;
CHECK_THROWS_AS(json(j.end(), j.end()), std::out_of_range);
CHECK_THROWS_AS(json(j.begin(), j.begin()), std::out_of_range);
}
{
json j = 23.42;
CHECK_THROWS_AS(json(j.cend(), j.cend()), std::out_of_range);
CHECK_THROWS_AS(json(j.cbegin(), j.cbegin()), std::out_of_range);
}
}
}
}
}
} }
TEST_CASE("other constructors and destructor") TEST_CASE("other constructors and destructor")
@ -2807,7 +3058,7 @@ TEST_CASE("element access")
} }
} }
SECTION("different arrays") SECTION("different objects")
{ {
{ {
json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}, {"d", false}, {"e", true}}; json jobject = {{"a", "a"}, {"b", 1}, {"c", 17}, {"d", false}, {"e", true}};