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Merge pull request #578 from Type1J/develop_feature_first_second

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Adding first and second properties to iteration_proxy_internal
This commit is contained in:
Niels Lohmann 2017-05-10 17:25:54 +02:00 committed by GitHub
parent 15ef9b8a35 6a656ed375
commit 5beea35443
1 changed files with 42 additions and 1 deletions
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43
src/json.hpp
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@ -7877,6 +7877,44 @@ class basic_json
class iteration_proxy
{
private:
/// helper class for first "property"
template<typename ProxyType>
class iterator_key_property
{
private:
/// the reference to the proxy
ProxyType& proxy;
public:
explicit iterator_key_property(ProxyType& proxyRef) noexcept
: proxy(proxyRef) {}
/// conversion operator (calls key())
operator typename basic_json::string_t() const
{
return proxy.key();
}
};
/// helper class for second "property"
template<typename ProxyType>
class iterator_value_property
{
private:
/// the reference to the proxy
ProxyType& proxy;
public:
explicit iterator_value_property(ProxyType& proxyRef) noexcept
: proxy(proxyRef) {}
/// conversion operator (calls value())
operator typename IteratorType::reference() const
{
return proxy.value();
}
};
/// helper class for iteration
class iteration_proxy_internal
{
@ -7887,8 +7925,11 @@ class basic_json
size_t array_index = 0;
public:
iterator_key_property<iteration_proxy_internal> first;
iterator_value_property<iteration_proxy_internal> second;
explicit iteration_proxy_internal(IteratorType it) noexcept
: anchor(it)
: anchor(it), first(*this), second(*this)
{}
/// dereference operator (needed for range-based for)