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Libraries
json
Commits
90eb0a91
Unverified
Commit
90eb0a91
authored
May 26, 2018
by
Niels Lohmann
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⚡
keys are now returned as const reference #1098
parent
4639bb2c
Changes
3
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3 changed files
with
30 additions
and
10 deletions
+30
-10
include/nlohmann/detail/iterators/iter_impl.hpp
include/nlohmann/detail/iterators/iter_impl.hpp
+1
-1
include/nlohmann/detail/iterators/iteration_proxy.hpp
include/nlohmann/detail/iterators/iteration_proxy.hpp
+14
-4
single_include/nlohmann/json.hpp
single_include/nlohmann/json.hpp
+15
-5
No files found.
include/nlohmann/detail/iterators/iter_impl.hpp
View file @
90eb0a91
...
...
@@ -583,7 +583,7 @@ class iter_impl
@brief return the key of an object iterator
@pre The iterator is initialized; i.e. `m_object != nullptr`.
*/
typename
object_t
::
key_type
key
()
const
const
typename
object_t
::
key_type
&
key
()
const
{
assert
(
m_object
!=
nullptr
);
...
...
include/nlohmann/detail/iterators/iteration_proxy.hpp
View file @
90eb0a91
...
...
@@ -21,6 +21,10 @@ template<typename IteratorType> class iteration_proxy
IteratorType
anchor
;
/// an index for arrays (used to create key names)
std
::
size_t
array_index
=
0
;
/// a string representation of the array index
std
::
string
array_index_str
=
"0"
;
/// an empty string (to return a reference for primitive values)
const
std
::
string
empty_str
=
""
;
public:
explicit
iteration_proxy_internal
(
IteratorType
it
)
noexcept
:
anchor
(
it
)
{}
...
...
@@ -35,7 +39,13 @@ template<typename IteratorType> class iteration_proxy
iteration_proxy_internal
&
operator
++
()
{
++
anchor
;
++
array_index
;
assert
(
anchor
.
m_object
!=
nullptr
);
if
(
anchor
.
m_object
->
is_array
())
{
// update array index and string representation
array_index_str
=
std
::
to_string
(
++
array_index
);
}
return
*
this
;
}
...
...
@@ -47,7 +57,7 @@ template<typename IteratorType> class iteration_proxy
}
/// return key of the iterator
std
::
string
key
()
const
const
std
::
string
&
key
()
const
{
assert
(
anchor
.
m_object
!=
nullptr
);
...
...
@@ -55,7 +65,7 @@ template<typename IteratorType> class iteration_proxy
{
// use integer array index as key
case
value_t
:
:
array
:
return
std
::
to_string
(
array_index
)
;
return
array_index_str
;
// use key from the object
case
value_t
:
:
object
:
...
...
@@ -63,7 +73,7 @@ template<typename IteratorType> class iteration_proxy
// use an empty key for all primitive types
default:
return
""
;
return
empty_str
;
}
}
...
...
single_include/nlohmann/json.hpp
View file @
90eb0a91
...
...
@@ -4636,7 +4636,7 @@ class iter_impl
@brief return the key of an object iterator
@pre The iterator is initialized; i.e. `m_object != nullptr`.
*/
typename
object_t
::
key_type
key
()
const
const
typename
object_t
::
key_type
&
key
()
const
{
assert
(
m_object
!=
nullptr
);
...
...
@@ -4691,6 +4691,10 @@ template<typename IteratorType> class iteration_proxy
IteratorType
anchor
;
/// an index for arrays (used to create key names)
std
::
size_t
array_index
=
0
;
/// a string representation of the array index
std
::
string
array_index_str
=
"0"
;
/// an empty string (to return a reference for primitive values)
const
std
::
string
empty_str
=
""
;
public:
explicit
iteration_proxy_internal
(
IteratorType
it
)
noexcept
:
anchor
(
it
)
{}
...
...
@@ -4705,7 +4709,13 @@ template<typename IteratorType> class iteration_proxy
iteration_proxy_internal
&
operator
++
()
{
++
anchor
;
++
array_index
;
assert
(
anchor
.
m_object
!=
nullptr
);
if
(
anchor
.
m_object
->
is_array
())
{
// update array index and string representation
array_index_str
=
std
::
to_string
(
++
array_index
);
}
return
*
this
;
}
...
...
@@ -4717,7 +4727,7 @@ template<typename IteratorType> class iteration_proxy
}
/// return key of the iterator
std
::
string
key
()
const
const
std
::
string
&
key
()
const
{
assert
(
anchor
.
m_object
!=
nullptr
);
...
...
@@ -4725,7 +4735,7 @@ template<typename IteratorType> class iteration_proxy
{
// use integer array index as key
case
value_t
:
:
array
:
return
std
::
to_string
(
array_index
)
;
return
array_index_str
;
// use key from the object
case
value_t
:
:
object
:
...
...
@@ -4733,7 +4743,7 @@ template<typename IteratorType> class iteration_proxy
// use an empty key for all primitive types
default:
return
""
;
return
empty_str
;
}
}
...
...
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