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◆ basic_json() [6/9]
template< template< typename U, typename V, typename... Args > class ObjectType = std::map, template< typename U, typename... Args > class ArrayType = std::vector, class StringType = std::string, class BooleanType = bool, class NumberIntegerType = std::int64_t, class NumberUnsignedType = std::uint64_t, class NumberFloatType = double, template< typename U > class AllocatorType = std::allocator, template< typename T, typename SFINAE= void > class JSONSerializer = adl_serializer>
Constructs the JSON value with the contents of the range [first, last) . The semantics depends on the different types a JSON value can have:
- In case of primitive types (number, boolean, or string), first must be
begin() and last must be end() . In this case, the value is copied. Otherwise, std::out_of_range is thrown.
- In case of structured types (array, object), the constructor behaves as similar versions for
std::vector .
- In case of a null type, std::domain_error is thrown.
- Template Parameters
-
- Parameters
-
[in] | first | begin of the range to copy from (included) |
[in] | last | end of the range to copy from (excluded) |
- Precondition
- Iterators first and last must be initialized. This precondition is enforced with an assertion.
- Exceptions
-
std::domain_error | if iterators are not compatible; that is, do not belong to the same JSON value; example: "iterators are not compatible" |
std::out_of_range | if iterators are for a primitive type (number, boolean, or string) where an out of range error can be detected easily; example: "iterators out of range" |
std::bad_alloc | if allocation for object, array, or string fails |
std::domain_error | if called with a null value; example: "cannot
use construct with iterators from null" |
- Complexity\n Linear in distance between first and last.
- Example\n The example below shows several ways to create JSON values by
- specifying a subrange with iterators.
8 json j_array = { "alpha", "bravo", "charly", "delta", "easy"};
iterator begin() noexcept returns an iterator to the first element
iterator end() noexcept returns an iterator to one past the last element
static basic_json array(std::initializer_list< basic_json > init=std::initializer_list< basic_json >()) explicitly create an array from an initializer list
iterator find(typename object_t::key_type key) find an element in a JSON object
a class to store JSON values
basic_json<> json default JSON class
Output (play with this example online):
["bravo","charly"]
42
{"one":"eins"}
The example code above can be translated with g++ -std=c++11 -Isrc doc/examples/basic_json__InputIt_InputIt.cpp -o basic_json__InputIt_InputIt
- Since
- version 1.0.0
Definition at line 2276 of file json.hpp.
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