NEWS.md

In lobstr: Visualize R Data Structures with Trees

lobstr 1.1.3

• Changes for compliance with R's public API. The main consequence is that lobstr no longer reports the truelength property of vectors.

We also changed the named indicator to refs:n, where n can take the values: 0 (corresponding to NO_REFERENCES returning 1), 1 (corresponding to both NO_REFERENCES MAYBE_SHARED returning 0), and 2+ (MAYBE_SHARED returning 1).

lobstr 1.1.2

• Switched to cpp11 from Rcpp.

• Relicensed as MIT (#51).

• obj_size() and sxp() now support non-nil terminated pairlists.

• obj_size() now displays large objects with KB, MB, etc (#57, #60), and no longer returns NA for objects larger than 2^31 bytes (#45).

• obj_sizes() now computes relative sizes correctly (without meaningless floating point differences).

• ref() lists all contents of environments even those with names beginning with . (@krlmlr, #53).

• New, experimental tree() function as alternative to str() (#56).

lobstr 1.1.1

• Fix PROTECT error.

• Remove UTF-8 characters from comments

lobstr 1.1.0

• ref() now handles custom classes properly (@yutannihilation, #36)

• sxp() is a new tool for displaying the underlying C representation of an object (#38).

• obj_size() now special cases the ALTREP "deferred string vectors" which previously crashed due to the way in which they abuse the pairlist type (#35).

lobstr 1.0.1

• ast() prints scalar integer and complex more accurately (#24)

• obj_addr() no longer increments the reference count of its input (#25)

• obj_size() now correctly computes size of ALTREP objects on R 3.5.0 (#32)

lobstr documentation built on Nov. 14, 2025, 5:06 p.m.