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Use AllocatorType<ObjectType::value_type>,

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instead of hard-coding it for std::map's value_type
This commit is contained in:
gatopeich 2020-06-22 18:35:46 +01:00
parent 15337b2cc3
commit ddf0a45abb
6 changed files with 10 additions and 12 deletions
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2
.gitignore vendored
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@ -26,6 +26,8 @@ cmake-build-debug
test/test-*
test/test_data.hpp
Temporary
/.vs
.vscode

2
README.md
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@ -1527,7 +1527,7 @@ This library will not support comments in the future. If you wish to use comment
### Order of object keys
By default, the library does not preserve the **insertion order of object elements**. This is standards-compliant, as the [JSON standard](https://tools.ietf.org/html/rfc8259.html) defines objects as "an unordered collection of zero or more name/value pairs". If you do want to preserve the insertion order, you can specialize the object type with containers like [`tsl::ordered_map`](https://github.com/Tessil/ordered-map) ([integration](https://github.com/nlohmann/json/issues/546#issuecomment-304447518)) or [`nlohmann::fifo_map`](https://github.com/nlohmann/fifo_map) ([integration](https://github.com/nlohmann/json/issues/485#issuecomment-333652309)).
By default, the library does not preserve the **insertion order of object elements**. This is standards-compliant, as the [JSON standard](https://tools.ietf.org/html/rfc8259.html) defines objects as "an unordered collection of zero or more name/value pairs". If you do want to preserve the insertion order, you can try the new [`nlohmann::ordered_json`](https://github.com/nlohmann/json/issues/2179) specialization, or use a more sophisticated ordered map like [`tsl::ordered_map`](https://github.com/Tessil/ordered-map) ([integration](https://github.com/nlohmann/json/issues/546#issuecomment-304447518)) or [`nlohmann::fifo_map`](https://github.com/nlohmann/fifo_map) ([integration](https://github.com/nlohmann/json/issues/485#issuecomment-333652309)).
### Memory Release

2
doc/mkdocs/docs/features/types.md
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@ -89,7 +89,7 @@ From the template arguments, the following types are derived:
```cpp
using object_comparator_t = std::less<>;
using object_t = ObjectType<StringType, basic_json, object_comparator_t,
AllocatorType<std::pair<const StringType, basic_json>>>;
AllocatorType<typename ObjectType<StringType, basic_json>::value_type>>;
using array_t = ArrayType<basic_json, AllocatorType<basic_json>>;

4
include/nlohmann/json.hpp
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@ -496,9 +496,7 @@ class basic_json
using object_t = ObjectType<StringType,
basic_json,
object_comparator_t,
// TODO: AllocatorType<ObjectType::value_type>
AllocatorType<std::pair<const StringType,
basic_json>>>;
AllocatorType<typename ObjectType<StringType, basic_json>::value_type>>;
/*!
@brief a type for an array

4
include/nlohmann/ordered_map.hpp
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@ -11,8 +11,8 @@ namespace nlohmann
/// ordered_map: a minimal map-like container that preserves insertion order
/// for use within nlohmann::basic_json<ordered_map>
template <class Key, class T, class IgnoredLess = std::less<Key>,
class IgnoredAllocator = std::allocator<std::pair<Key, T>>,
class Container = std::vector<std::pair<Key, T>>>
class Allocator = std::allocator<std::pair<Key, T>>,
class Container = std::vector<std::pair<Key, T>, Allocator>>
struct ordered_map : Container
{
using key_type = Key;

8
single_include/nlohmann/json.hpp
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@ -15880,8 +15880,8 @@ namespace nlohmann
/// ordered_map: a minimal map-like container that preserves insertion order
/// for use within nlohmann::basic_json<ordered_map>
template <class Key, class T, class IgnoredLess = std::less<Key>,
class IgnoredAllocator = std::allocator<std::pair<Key, T>>,
class Container = std::vector<std::pair<Key, T>>>
class Allocator = std::allocator<std::pair<Key, T>>,
class Container = std::vector<std::pair<Key, T>, Allocator>>
struct ordered_map : Container
{
using key_type = Key;
@ -16348,9 +16348,7 @@ class basic_json
using object_t = ObjectType<StringType,
basic_json,
object_comparator_t,
// TODO: AllocatorType<ObjectType::value_type>
AllocatorType<std::pair<const StringType,
basic_json>>>;
AllocatorType<typename ObjectType<StringType, basic_json>::value_type>>;
/*!
@brief a type for an array