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S7 0.2.0

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@hadley hadley released this 07 Nov 13:32
v0.2.0
860394b

New features

  • The default object constructor returned by new_class() has been updated.
    It now accepts lazy (promise) property defaults and includes dynamic properties
    with a setter in the constructor. Additionally, all custom property setters
    are now consistently invoked by the default constructor. If you're using S7 in
    an R package, you'll need to re-document to ensure that your documentation
    matches the updated usage (#438, #445).

  • The call context of a dispatched method (as visible in sys.calls() and
    traceback()) no longer includes the inlined method and generic, resulting in
    more compact and readable tracebacks. The dispatched method call now contains
    only the method name, which serves as a hint for retrieving the method. For
    example: method(my_generic, class_double)(x=10, ...). (#486)

  • New nameOfClass() method exported for S7 base classes, to enable usage like
    inherits("foo", S7::class_character) (#432, #458)

  • Added support for more base/S3 classes (#434): class_POSIXlt,
    class_POSIXt, class_formula, class_call, class_language,
    and class_name.

  • S7 provides a new automatic backward compatibility mechanism to provide
    a version of @ that works in R before version 4.3 (#326).

Bug fixes and minor improvements

  • new_class() now automatically infers the package name when called from
    within an R package (#459).

  • Improved error message when custom validators return invalid values (#454, #457).

  • Fixed S3 methods registration across packages (#422).

  • convert() now provides a default method to transform a parent class instance
    into a subclass, enabling class construction from a prototype (#444).

  • A custom property getter() no longer infinitely recurses when accessing
    itself (reported in #403, fixed in #406).

  • method()generates an informative message with class
    S7_error_method_not_found when dispatch fails (#387).

  • method<-() can create multimethods that dispatch on NULL.

  • In new_class(), properties can either be named by naming the element
    of the list or by supplying the name argument to new_property() (#371).

  • The Ops generic now falls back to base Ops behaviour when one of the
    arguments is not an S7 object (#320). This means that you get the somewhat
    inconsistent base behaviour, but means that S7 doesn't introduce a new axis
    of inconsistency.

  • prop() (#395) and prop<-/@<- (#396) have been optimized and
    rewritten in C.

  • super() now works with Ops methods (#357).

  • validate() is now always called after a custom property setter was invoked
    (reported in #393, fixed in #396).

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