Forest v2.1.5

Changes:

1. Minor improvements:

   • Smarter baseline default for the linguistics library.

   • Yield warning when the baseline is set to a node that is not drawn (e.g. a phantom node).

Forest v2.1.4

Changes:

1. Performance:
   • Reimplement some internals of the packing algorithm to avoid
     consuming the string pool in documents with many trees. (We're about
     10% slower now, but (depending on the document) the memory usage
     can drop up to five times!)
2. Bugfixes:
   • Fix aggregate function count.
   • Provide a workaround for a PGF bug: for coordinate-shaped nodes,
     \positionnodelater provides dimensions with pt in a wrong
     catcode, so max y and friends did not work for such nodes.

Forest v2.1.3

Changes:

1. Bugfix:
   • Update nice empty nodes from linguistics library to use for current and siblings.

Forest v2.1.2

Changes:

1. Bugfixes:
   • A level of hash doubling was unnecessarily introduced for the
     argument of all loops, and the argument of
     process keylist and process delayed. (Use compat key
     2.1.1-loops to revert to the old behaviour.)
2. Minor improvements:
   • Implemented key also.

Forest v2.1.1

Changes:

1. Minor improvements
   • Implemented argument processor instruction \index{processor>p}.
2. Bugfixes
   • Argument processor instruction u introduced an extra layer of braces
     around each result item.
   • Argument processor instructions l and L did not always load the
     desided number of arguments.
   • Argument processor instructions and and or were taking the
     arguments from the start of the left side instead of its end.

Forest v2.1

Changes:

1. Performance:
   • Substantially enhance the argument processor.
   • <forestmath> expressions: accept an argument processor expression whereever a <pgfmath> expression is allowed, simply by prefixing it with >.
   • Internally, avoid using pgfmath whereever possible.
   • Implement a fast set of macros to determine if a <pgfmath> expression is just a count or dimen expression.
   • Optimize keys split option and split register.
2. Minor improvements:
   • Allow s in handler .option.
   • Make aggregate functions nestable and implement their pgfmath versions.
   • Implement if option/register</> for dimen and count options and registers.
   • Implement if current nodewalk empty.
   • Implement nodewalk steps leaves,-leveland-level'`.
   • Implement nodewalk operation unique.
   • Implement nodewalk key on invalid values error if real and last valid; remove value step (no compat key, as it was broken and useless).
   • Implement growth direction based anchors with the - prefix: -parent, -parent first etc.
   • Implement key save and restore register.
   • Implement handler .nodewalk style.
   • Implement pgfmath function forestloopcount.
   • Allow multiple occurrences of package option compat.
3. Bugfixes:
   • Fix a bug in externalization: \forest@file@copy set \endlinechar to -1, which caused problems for several packages, e.g. biblatex.
   • Fix a bug in delay n: the number of cycles was reevaluated at each cycle (with compat=2.0-delayn key).
   • Fix a bug in fixed edge angles.
   • Fix compat=silent, compat=1.0-forstep and compat=1.0-stages.
   • Fix invocations of spatial propagators for nodewalk, for Nodewalk and Nodewalk.
   • Fix invocations of nodewalk steps for group, for next on tier and for previous on tier.
   • Fix behaviour of for next on tier, for previous on tier and for to tier on arrival to the invalid node.
   • Fix problems with interaction between folder and forked edges.

Forest v2.0.3

Changes:

1. Bugfixes
   • Keys delay n and .wrap n pgfmath args don't introduce two layers of hash doubling anymore (with compat keys for the old, confusing behaviour).
   • Execute tikz code for all (including phantom) nodes. (The feature of ignoring phantom nodes was introduced in v2.0.2, but turns out it was a bad idea: for example, having a phantom root with some tikz code is not uncommon.)
   • Keys label and pin now append to option tikz, as makes sense.
   • Fix nodewalk steps filter and branch so that they can be embedded under nodewalk operations.
   • Execute before packing node even when the node has no children.
   • level<={0}{...} now works as expected.
   • Re-setting the node name to the same value doesn't yield an error anymore.
   • Don't add the separator when adding the first element to a keylist option or register.
   • Copy externalization files in TeX (don't rely on \write18).
   • Consistently store dimen options and registers with pts of catcode other.
   • Properly initialize readonly count options (n, n' n children and level).
2. New features
   • Rework draw tree edge so that by default, an edge is drawn only it both its node and its node's parent are drawn. And yes, implement if node drawn.
   • Implement circularity detection in dynamic node operations.
   • Implement debug categories and debugging of dynamic node operations.
   • Declare some further tempdim... registers.
   • Make option id accessible via \forestoption.

Forest v2.0.2

Changes:

1. Bugfixes
   • Respect phantom when drawing extra tikz material.
   • Silently rename the standard node when redefining it.
   • Restore original pgfpath after packing.
   • Initialize registers (to {} / 0pt / 0).
   • Dynamic key replace by now successfully replaces the root node.
2. New features
   • Generalize (parenthesized) argument of forest environment /
     \Forest macro from temporary redefinition of stages into a
     general, key-value based configuration argument of the current
     environment / macro.
   • It is now possible to pass package options to libraries.
   • Implement draw tree node', draw tree edge' and draw tree tikz'.
   • Implement handler .nodewalk style.
   • Implement step last dynamic node and named nodewalk dynamic nodes.
3. Documentation
   • Improve documentation of draw tree and friends.
   • Fix some typos.

Forest v2.0.1

v2.0.1

Changes:

1. Bugfixes
   • Change the copyright year to 2016!
   • In calign=edge midpoint: s-align the midpoint between the children's
     child anchors as advertised in the documentation: to parent's parent
     anchor, not node anchor.
   • Correctly mangle option/register names to pgfmath names.
   • Accept key history in Nodewalk config.
2. New features
   • Add * argument to \useforestlibrary.
   • Implement current and siblings (reversed).
3. Documentation
   • Add examples of embedded nodewalks.
   • Fix the documentation of option anchor.
   • Fix documentation of calign.
   • Add a note on typos in temporal propagators.

... and some minor stuff.

Forest v2.0.0

This is the first release of Forest v2 posted on CTAN.

Major changes since v1:

• Much improved nodewalks.
• Added temporal propagators before packing node and after packing node.
• Implemented looping mechanisms and more conditionals.
• Implemented library support.
• Introduced registers.

For the full list of changes, see the changelog in the manual (section 6).