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Upstream changes:
R6 2.5.1
Removed unused packages from Suggests section in DESCRIPTION.
R6 2.5.0
Resolved #195: Slightly clearer message when there is an error in the initialize() method.
Fixed #214: When a non-portable object inheritance was cloned, methods that were inherited (and not overridden) had the wrong environment. (#215, #217)
Printing R6 objects, no longer includes .__active__.
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The canonical form [1] of an R package Makefile includes the
following:
- The first stanza includes R_PKGNAME, R_PKGVER, PKGREVISION (as
needed), and CATEGORIES.
- HOMEPAGE is not present but defined in math/R/Makefile.extension to
refer to the CRAN web page describing the package. Other relevant
web pages are often linked from there via the URL field.
This updates all current R packages to this form, which will make
regular updates _much_ easier, especially using pkgtools/R2pkg.
[1] http://mail-index.netbsd.org/tech-pkg/2019/08/02/msg021711.html
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Update to the canonical form of an R package.
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Upstream changes:
R6 2.3.0
Vignettes are no longer included as part of the source package because of their large size. Documentation is now at https://r6.r-lib.org/.
Fixed #125: The print.R6 method now always returns the object that was passed to it.
Fixed #155: In some cases, a cloned object’s methods could refer to the wrong super object. (#156)
Fixed #94, #133: When cloning an object which contained a function that is not a method, the corresponding function in the new object would have its environment changed, as though it were a method. Now it no longer has a changed environment. (#156)
Fixed #121: If a finalize method was present, it would prevent objects passed to initialize from getting GC’d.
Fixed #158: If a $set method of an R6 generator object is given the value NULL, it previously removed the named item. Now it adds the named item with the value NULL.
Fixed #159: Printing an R6 object containing a large vector was slow.
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Each R package should include ../../math/R/Makefile.extension, which also
defines MASTER_SITES. Consequently, it is redundant for the individual
packages to do the same. Package-specific definitions also prevent
redefining MASTER_SITES in a single common place.
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The R6 package allows the creation of classes with reference
semantics, similar to R's built-in reference classes. Compared to
reference classes, R6 classes are simpler and lighter-weight, and they
are not built on S4 classes so they do not require the methods
package. These classes allow public and private members, and they
support inheritance, even when the classes are defined in different
packages.
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