access specified object element via JSON Pointer with default value

Synopsis

Declared in <nlohmann/json.hpp>

template<
    class ValueType,
    class ReturnType = value_return_type<ValueType>::type>
requires detail::is_getable<basic_json_t, ReturnType>::value
                   && !std::is_same<value_t, detail::uncvref_t<ValueType>>::value
ReturnType
value(
    json_pointer const& ptr,
    ValueType&& default_value) const;

Return Value

value at ptr if found, otherwise default_value

Parameters

Name

Description

ptr

JSON pointer to the element to access

default_value

value to return if ptr does not resolve to a value

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