This commit is contained in:
Niels 2015-12-23 12:05:57 +01:00
parent fcbd984e0f
commit 8620583cf9
2 changed files with 208 additions and 198 deletions

View file

@ -3779,6 +3779,9 @@ class basic_json
iterator::value() during range-based for loops. In these loops, a reference iterator::value() during range-based for loops. In these loops, a reference
to the JSON values is returned, so there is no access to the underlying to the JSON values is returned, so there is no access to the underlying
iterator. iterator.
@note The name of this function is not yet final and may change in the
future.
*/ */
static iteration_proxy<iterator> iterator_wrapper(reference cont) static iteration_proxy<iterator> iterator_wrapper(reference cont)
{ {
@ -5432,6 +5435,100 @@ class basic_json
{} {}
}; };
/// proxy class for the iterator_wrapper functions
template<typename IteratorType>
class iteration_proxy
{
private:
/// helper class for iteration
class iteration_proxy_internal
{
private:
/// the iterator
IteratorType anchor;
/// an index for arrays (used to create key names)
size_t array_index = 0;
public:
iteration_proxy_internal(IteratorType it)
: anchor(it)
{}
/// dereference operator (needed for range-based for)
iteration_proxy_internal& operator*()
{
return *this;
}
/// increment operator (needed for range-based for)
iteration_proxy_internal& operator++()
{
++anchor;
++array_index;
return *this;
}
/// inequality operator (needed for range-based for)
bool operator!= (const iteration_proxy_internal& o)
{
return anchor != o.anchor;
}
/// return key of the iterator
typename basic_json::string_t key() const
{
switch (anchor.m_object->type())
{
// use integer array index as key
case value_t::array:
{
return std::to_string(array_index);
}
// use key from the object
case value_t::object:
{
return anchor.key();
}
// use an empty key for all primitive types
default:
{
return "";
}
}
}
/// return value of the iterator
typename IteratorType::reference value() const
{
return anchor.value();
}
};
/// the container to iterate
typename IteratorType::reference container;
public:
/// construct iteration proxy from a container
iteration_proxy(typename IteratorType::reference cont)
: container(cont)
{}
/// return iterator begin (needed for range-based for)
iteration_proxy_internal begin()
{
return iteration_proxy_internal(container.begin());
}
/// return iterator end (needed for range-based for)
iteration_proxy_internal end()
{
return iteration_proxy_internal(container.end());
}
};
public: public:
/*! /*!
@brief a const random access iterator for the @ref basic_json class @brief a const random access iterator for the @ref basic_json class
@ -5959,7 +6056,8 @@ class basic_json
iterator() = default; iterator() = default;
/// constructor for a given JSON instance /// constructor for a given JSON instance
iterator(pointer object) noexcept : base_iterator(object) iterator(pointer object) noexcept
: base_iterator(object)
{} {}
/// copy constructor /// copy constructor
@ -6097,10 +6195,13 @@ class basic_json
/// create reverse iterator from iterator /// create reverse iterator from iterator
json_reverse_iterator(const typename base_iterator::iterator_type& it) json_reverse_iterator(const typename base_iterator::iterator_type& it)
: base_iterator(it) {} : base_iterator(it)
{}
/// create reverse iterator from base class /// create reverse iterator from base class
json_reverse_iterator(const base_iterator& it) : base_iterator(it) {} json_reverse_iterator(const base_iterator& it)
: base_iterator(it)
{}
/// post-increment (it++) /// post-increment (it++)
json_reverse_iterator operator++(int) json_reverse_iterator operator++(int)
@ -6179,102 +6280,6 @@ class basic_json
}; };
private:
/// proxy class for the iterator_wrapper functions
template<typename IteratorType>
class iteration_proxy
{
private:
/// helper class for iteration
class iteration_proxy_internal
{
private:
/// the iterator
IteratorType anchor;
/// an index for arrays
size_t array_index = 0;
public:
iteration_proxy_internal(IteratorType it)
: anchor(it)
{}
/// dereference operator (needed for range-based for)
iteration_proxy_internal& operator*()
{
return *this;
}
/// increment operator (needed for range-based for)
iteration_proxy_internal& operator++()
{
++anchor;
++array_index;
return *this;
}
/// inequality operator (needed for range-based for)
bool operator!= (const iteration_proxy_internal& o)
{
return anchor != o.anchor;
}
/// return key of the iterator
typename basic_json::string_t key() const
{
switch (anchor.m_object->type())
{
// use integer array index as key
case value_t::array:
{
return std::to_string(array_index);
}
// use key from the object
case value_t::object:
{
return anchor.key();
}
// use an empty key for all primitive types
default:
{
return "";
}
}
}
/// return value of the iterator
typename IteratorType::reference value() const
{
return anchor.value();
}
};
/// the container to iterate
typename IteratorType::reference container;
public:
/// construct iteration proxy from a container
iteration_proxy(typename IteratorType::reference cont)
: container(cont)
{}
/// return iterator begin (needed for range-based for)
iteration_proxy_internal begin()
{
return iteration_proxy_internal(container.begin());
}
/// return iterator end (needed for range-based for)
iteration_proxy_internal end()
{
return iteration_proxy_internal(container.end());
}
};
private: private:
////////////////////// //////////////////////
// lexer and parser // // lexer and parser //

View file

@ -3779,6 +3779,9 @@ class basic_json
iterator::value() during range-based for loops. In these loops, a reference iterator::value() during range-based for loops. In these loops, a reference
to the JSON values is returned, so there is no access to the underlying to the JSON values is returned, so there is no access to the underlying
iterator. iterator.
@note The name of this function is not yet final and may change in the
future.
*/ */
static iteration_proxy<iterator> iterator_wrapper(reference cont) static iteration_proxy<iterator> iterator_wrapper(reference cont)
{ {
@ -5432,6 +5435,100 @@ class basic_json
{} {}
}; };
/// proxy class for the iterator_wrapper functions
template<typename IteratorType>
class iteration_proxy
{
private:
/// helper class for iteration
class iteration_proxy_internal
{
private:
/// the iterator
IteratorType anchor;
/// an index for arrays (used to create key names)
size_t array_index = 0;
public:
iteration_proxy_internal(IteratorType it)
: anchor(it)
{}
/// dereference operator (needed for range-based for)
iteration_proxy_internal& operator*()
{
return *this;
}
/// increment operator (needed for range-based for)
iteration_proxy_internal& operator++()
{
++anchor;
++array_index;
return *this;
}
/// inequality operator (needed for range-based for)
bool operator!= (const iteration_proxy_internal& o)
{
return anchor != o.anchor;
}
/// return key of the iterator
typename basic_json::string_t key() const
{
switch (anchor.m_object->type())
{
// use integer array index as key
case value_t::array:
{
return std::to_string(array_index);
}
// use key from the object
case value_t::object:
{
return anchor.key();
}
// use an empty key for all primitive types
default:
{
return "";
}
}
}
/// return value of the iterator
typename IteratorType::reference value() const
{
return anchor.value();
}
};
/// the container to iterate
typename IteratorType::reference container;
public:
/// construct iteration proxy from a container
iteration_proxy(typename IteratorType::reference cont)
: container(cont)
{}
/// return iterator begin (needed for range-based for)
iteration_proxy_internal begin()
{
return iteration_proxy_internal(container.begin());
}
/// return iterator end (needed for range-based for)
iteration_proxy_internal end()
{
return iteration_proxy_internal(container.end());
}
};
public: public:
/*! /*!
@brief a const random access iterator for the @ref basic_json class @brief a const random access iterator for the @ref basic_json class
@ -5959,7 +6056,8 @@ class basic_json
iterator() = default; iterator() = default;
/// constructor for a given JSON instance /// constructor for a given JSON instance
iterator(pointer object) noexcept : base_iterator(object) iterator(pointer object) noexcept
: base_iterator(object)
{} {}
/// copy constructor /// copy constructor
@ -6097,10 +6195,13 @@ class basic_json
/// create reverse iterator from iterator /// create reverse iterator from iterator
json_reverse_iterator(const typename base_iterator::iterator_type& it) json_reverse_iterator(const typename base_iterator::iterator_type& it)
: base_iterator(it) {} : base_iterator(it)
{}
/// create reverse iterator from base class /// create reverse iterator from base class
json_reverse_iterator(const base_iterator& it) : base_iterator(it) {} json_reverse_iterator(const base_iterator& it)
: base_iterator(it)
{}
/// post-increment (it++) /// post-increment (it++)
json_reverse_iterator operator++(int) json_reverse_iterator operator++(int)
@ -6179,102 +6280,6 @@ class basic_json
}; };
private:
/// proxy class for the iterator_wrapper functions
template<typename IteratorType>
class iteration_proxy
{
private:
/// helper class for iteration
class iteration_proxy_internal
{
private:
/// the iterator
IteratorType anchor;
/// an index for arrays
size_t array_index = 0;
public:
iteration_proxy_internal(IteratorType it)
: anchor(it)
{}
/// dereference operator (needed for range-based for)
iteration_proxy_internal& operator*()
{
return *this;
}
/// increment operator (needed for range-based for)
iteration_proxy_internal& operator++()
{
++anchor;
++array_index;
return *this;
}
/// inequality operator (needed for range-based for)
bool operator!= (const iteration_proxy_internal& o)
{
return anchor != o.anchor;
}
/// return key of the iterator
typename basic_json::string_t key() const
{
switch (anchor.m_object->type())
{
// use integer array index as key
case value_t::array:
{
return std::to_string(array_index);
}
// use key from the object
case value_t::object:
{
return anchor.key();
}
// use an empty key for all primitive types
default:
{
return "";
}
}
}
/// return value of the iterator
typename IteratorType::reference value() const
{
return anchor.value();
}
};
/// the container to iterate
typename IteratorType::reference container;
public:
/// construct iteration proxy from a container
iteration_proxy(typename IteratorType::reference cont)
: container(cont)
{}
/// return iterator begin (needed for range-based for)
iteration_proxy_internal begin()
{
return iteration_proxy_internal(container.begin());
}
/// return iterator end (needed for range-based for)
iteration_proxy_internal end()
{
return iteration_proxy_internal(container.end());
}
};
private: private:
////////////////////// //////////////////////
// lexer and parser // // lexer and parser //