0.14.0

Full Changelog

Rework header structure and rework observers

• Add ureact::happened adaptor
• BREAKING! Big structure update
  Root ureact folder become clearer (6 headers vs 14) and ureact/adaptor
  folder now mostly contain only so named adaptors in each header.
  • move ureact/default_context.hpp content into ureact/context.hpp
    it contains a single function, and it is unconditionally included
    in ureact/signal.hpp and ureact/events.hpp anyway
  • move ureact/temp_signal.hpp into ureact/detail
    because it is not intended to be included and used by library user
  • move ureact/has_changed.hpp into ureact/detail
    because it is not intended to be included and used by library user. User
    can define its own has_changed overload, but has_changed.hpp is not
    needed to do so.
  • move some headers that are not useful by themselves in a
    new ureact/utility directory. Namely:
    • ureact/unit.hpp
    • ureact/type_traits.hpp
    • ureact/signal_pack.hpp
    • ureact/event_range.hpp
    • ureact/event_emitter.hpp
  • extract ureact::join_with from ureact/adaptor/join.hpp
    to ureact/adaptor/join_with.hpp
  • extract ureact::changed_to from ureact/adaptor/changed.hpp
    to ureact/adaptor/changed_to.hpp
  • extract ureact::keys and ureact::values
    from ureact/adaptor/elements.hpp
    to ureact/adaptor/keys.hpp and ureact/adaptor/values.hpp
• BREAKING! #120 Rework observers
  • observable_node is no longer owns observers, and it is removed at all (
    node_base is used instead)
  • observer nodes own their subjects
  • scoped_observer is removed
  • observer owns its observer node and nothing else
  • tap nodes are introduced to own both observer and observed node
  • result of observe should no longer discarded for both L-value and R-value
    subjects
  • See #120 for examples and problem description
• #113 Add observe_policy, so even current signal values can be notified if
  needed