NEWS.md

In crowding/nse: Tools for Lazy and Non-Standard Evaluation

nseval 0.5.1 (release date: 2023-12-11)

Fixes:

• Fix issues raised by CRAN:
• Always cast argument of printf("%p", ...) to (void *)

nseval 0.5

Changes

• The representation of quotations has been changed. Quotations are now represented as expressions with a class attribute. This means that you can eval a quotation and it will return the same value that a promise would return when forced. This also means that you can bquote or substitute to place a quotation into an expression, and the resulting expression will evaluate hygienically.
• The better to support hygiene, arg* will check if there a quotation in the argument expression (as it would be if the call had been done with bquote) and transparently unwrap it.
• Added method is_forced_.name.
• Added arg_value to peek at values of promises (without forcing).
• Added as.quo conversion methods for formulas and rlang quosures.

Fixes:

• Added some support for "weird" promises. These are created by primitive s3 methods dispatched from a generic like c. These promises are forced (have a value, which was dispatched from) but still have an environment.

nseval 0.4.3

Fixes

• Added memory protection calls where identified by rchk.
• Comply with -Wstrict-prototypes.

nseval 0.4.2

Changes

• Implemented all.equal method for quotation objects.
• dots and quotation objects now print themselves in a deparse()-like style.
• is_*_() functions how have methods for promises/dots.
• set_ and set_enclos_ are added to help with making assignments.

Fixes

• Fixed handling of missing arguments in do and quo.
• do now passes arguments via a temporary binding of ... in some cases. This should fix some cases where sys.calls() returned naked promises, which made for confusing debugging. For R versions before 4.0 the old behavior is retained.
• Fixed man pages which were not generated completely.
• locate(fn, mode="function") now works in the case where fn is a forced promise containing a function.

nseval 0.4.1

Fixes

• caller now correctly returns its ifnotfound argument.

nseval 0.4

Initial CRAN Release.

crowding/nse documentation built on Jan. 5, 2024, 12:14 a.m.