v1.11.1

Changelog

v1.11.1 (2025-04-01)

• Fixed Tree SVG rendering (after introducing Tree.eq).

v1.11 (2025-03-29)

• Added new ComputationGraph class.

v1.10 (2025-03-27)

• Minor cleanups and improvements.
• Added Production.is_epsilon method.
• Added Productions.has_epsilon_productions method.
• Added Grammar.has_epsilon_productions method.
• Improved TopDownInstantaneousDescription and BottomUpInstantaneousDescription to handle
  epsilon productions.
• Added Tree.eq and Tree.hash methods (to allow Stack of trees comparison, required
  to avoid loops in simulations of automata combinations).

v1.9.1 (2025-03-24)

• Major rewriting of the HTML styles for tables (to improve VScode and Quarto compatibility).
• Added an embed_css function and a CUSTOM_CSS constant.
• Moved Table and CYKTable from liblet.utils to liblet.display.
• Introduced deprecation_warning to distinguish from warn (liblet internal function)

v1.8.0 (2025-03-13)

• Deprecated first, to extract an element from a set there is set.pop.
• Deprecated pyast2tree, not is the from_pyast factory method of Tree.
• Production if the rhs is the empty tuple or list is created as an epsilon
  rule.
• Added equals and hash to InstantaneousDescription that can be used to avoid
  loops in simulations.

v1.7.9 (2025-02-28)

• Updated conf.py because Sphinx does not like versions.html anymore.

v1.7.8 (2025-02-28)

• Updated .readthedocs.yml to include sphinx configuration.

v1.7.7 (2025-02-28)

• Updated ANTLR to 4.13.2.

v1.7.6 (2024-05-28)

• Tree.with_threads now shows labels for jumps different from next.

v1.7.5 (2024-04-12)

• Added the line number as attribute of the ANTLR annotated parse tree.
• Now TopDownInstantaneousDescription.predict does not put the ε on the stack.

v1.7.4 (2024-04-11)

• Added save and load to ANTLR and AnnotatedTreeWalker documentation.
• Now also table use "Fira Code" (and the font name is in liblet.const).

v1.7.3 (2024-04-04)

• Forgot to refactor tests.

v1.7.2 (2024-04-04)

• GVWrapper now uses "Fira Code" as default font.
• Improved InstantaneousDescription representations
• Fixed a bug in Tree graph representation.

v1.7.1 (2024-04-04)

• Added resized_svg_repr to liblet.display.
• Added svglib dependency (needed by resized_svg_repr).
• Improved GVWrapper in liblet.display.
• Added compose in liblet.utils.

v1.7.0a0 (2024-03-25)

• Removed support for Python < 3.10.
• All source are clean according to ruff.
• Big refactoring in liblet.display, favoring composition (with the new
  GVWrapper) over inheritance (of BaseGraph(ABC)).
• InstantaneousDescription now uses colors instead of unicode combining
  characters
• Minor cleanups and fixes.

v1.6.4a0 (2024-02-25)

• Here we are again: forcing publication.
• Removed bump2version config.

v1.6.4 (2024-02-25)

• Updated ANTLR to 4.13.1.

v1.6.3a1 (2023-04-04)

• Forcing publication.

v1.6.3a (2023-04-04)

• Removed a spurious sort in Talbe (columns), that induced an
  apparent error in FIRST/FOLLOW tables computation.

v1.6.2a (2023-02-25)

• Fixed the Readthedocs build.

v1.6.1a (2023-02-25)

• Using hatch for testing, tox gone forever.

v1.6.0a (2023-02-24)

• Migrated to Hatch (and pyproject.toml from setup.py).
• Updated to ANTLR to 4.12.0.
• Added GitHub Actions Status badge.
• Added testing for python 3.10.

v1.5.7-alpha (2022-05-30)

• Added html escamping to cell contents in Table.
• Added warning reporting when generating ANTLR files from grammar.
• Fixed a deprecation warning in some of the regexp.
• Added first to API documentation.
• Using tox instead of tox4.
• Updated antlr to 4.10.
• Using bump2version instead of the deprecated bumpversion.

v1.5.5-alpha (2022-03-18)

• The base element of a CYKTable is a set.
• Added installation of LLVM 11 to the gitpod Dockerfile.
• Updated documentation to the actually used versions of dependencies.
• CYKTable replaces cyk2table in documentation examples.
• Using GITHUB_WORKSPACE instead of hard wiring the path in GitHub workflow.

v1.5.4-alpha (2022-03-18)

• Introduced CYKTable (and deprecated cyk2table).

v1.5.3-alpha (2022-03-15)

• Automating the publish/release via GitHub Actions.

v1.5.3-alpha (2022-03-15)

• Productions now sorts the table rows (in production order).
• Updated examples to use Productions instead prods2table (now deprecated).
• Testing coverage is reported using Coveralls (instead of Codecov).

v1.5.2-alpha (2022-03-11)

• A new Productions class has been introduced to allow a nicer HTML
  representation of grammar productions.
• Added the Graph.neighbors method (to iterate on adjacency lists).
• Made Tree iterable (to allow for root and children unpakcing).
• Major code reformatting (now 2 spaces are used instead of 4).
• Cosmetic fixes (removing some stale imports and commited files).
• Now docs point to Gitpod (Binder is completely gone).

v1.5.1-alpha (2022-03-08)

• From binder to gitpod.
• Updated to the new graphviz api.
• Now sing GitHub Actions to run tests (instead of Travis).

v1.5.0-alpha (2022-02-11)

• Getting ready for the next year.
• Fixed unittest discover parameters.
• Updated dependency to ANTLR 4.9.3.

v1.4.2-alpha (2021-06-04)

• Emergency fix for LLVM toolchain detection code.

v1.4.1-alpha (2021-06-04)

• Added installation instructions related to the new LLVM module.
• Completely removed beaconing.
• Added support for tox testing (with Python 3.7, 3.8, and 3.9).

v1.4.0-alpha (2021-05-28)

• Added an experimental LLVM module to support IR code generation.
• AnnotatedTreeWalker.TREE_CATCHALL does not collect None subtrees.
• AnnotatedTreeWalker.register decorator trims ending _ (to allow builtin named
  keys).
• AnnotatedTreeWalker.register optionally takes the function name.
• Annotated trees now have an attr attribute defined as a AttrDict wrapping the
  root dict.
• Added AttrDict in liblet.utils.
• ANTLR.context and ANTLR.tree accept a antlr_hook parameter that allows
  complete configuration of the underlying lexer and parser.
• Stack and Queue now support reversed iteration.

v1.3.8-alpha (2021-05-06)

• The ANTLR and AnnotatedTreeWalker object can be serialized (suing the
  load/save methods).
• Added pyast2tree method to get a Tree from a Python ast.
• Annotated Tree rich display ignores dictionary keys starting with 'thread'.

v1.3.6-alpha (2021-05-03)

• Added src key to annotated trees produced by the tree method of
  ANTLR objects.
• Improved hash sign readability (defined the HASH constant equal to '\u266F',
  replacing previous '\uFF03')
• Derivation can now start from any nonterminal.

v1.3.3-alpha (2021-04-20)

• The display.side_by_side now accepts a single argument (and iterates
  over it).

v1.3.2-alpha (2021-04-19)

• Now TopDownInstantaneousDescription.match skips epsilon on the stack.
• Added the suffixes commodity function in utlis package.
• Minimal docs improvements.

v1.3.1-alpha (2021-04-11)

• InstantaneousDescription has been subclassed in two specilized classes:
  TopDownInstantaneousDescription and BottomUpInstantaneousDescription.
• Stack and Queues copy method has been deprecated in favor of more
  standard use of the copy module (the shallow copy obtains a separate
  storage by overriding copy).
• InstantaneousDescription and its subclasses shallow copies don't share
  the stack with the original object (obtained by overriding copy).
• Improved deprecations (now the warning module is used instead of raise).

v1.3.0-alpha (2021-04-10)

• Added a first version of the InstantaneousDescription class (in liblet.automata).
• Documentation improvement (substituted :obj: with :class: where appropriate).
• Bumped ANTLR version to 4.9.1.
• Created FUNDING.yml for GitHub sponsorship.

v1.2.3-beta (2020-05-07)

• To avoid confusion with peek of Stack and Queue, utils.peek has been
  deprecated in favor of utils.first.
• Updated Automaton and StateTransitionGraph to allow representing item
  set with frozenset instead of tuples.
• Modified utils.closure so that it always return the computed value,
  in this way if just one iteration is performed, the returned type
  coincides nonetheless with the type returned by the wrapped function.
• Fixing some graphviz visualization sizes.

v1.2.1-beta (2020-05-07)

• Added a missing import.

v1.2.0-beta (2020-05-07)

• Added a Table class.
• Small fixes to texts and docs.
• Added an introduction in the documentation to highlight the difference among
  words and strings.
• Added a workaround to have bordered HTML tables in Jupyter Lab.

v1.2.0-beta (2020-04-21)

• Bumped to beta.
• Added display.animate_derivation (and hence ipywidgets to the deps).
• Dderivation now admits productions and not only indexes.
• Added utils.uc to append unicode combination chars.
• Grammar.restrict_to now makes explicit that the start symbol must be kept and
  throws away productions containing also not specified terminals.

v1.1.0-alpha (2020-03-31)

• Now Derivation accepts also an iterable of s...

v1.11.0

Changelog

v1.11 (2025-03-29)

• Added new ComputationGraph class.

v1.10 (2025-03-27)

• Minor cleanups and improvements.
• Added Production.is_epsilon method.
• Added Productions.has_epsilon_productions method.
• Added Grammar.has_epsilon_productions method.
• Improved TopDownInstantaneousDescription and BottomUpInstantaneousDescription to handle
  epsilon productions.
• Added Tree.eq and Tree.hash methods (to allow Stack of trees comparison, required
  to avoid loops in simulations of automata combinations).

v1.9.1 (2025-03-24)

• Major rewriting of the HTML styles for tables (to improve VScode and Quarto compatibility).
• Added an embed_css function and a CUSTOM_CSS constant.
• Moved Table and CYKTable from liblet.utils to liblet.display.
• Introduced deprecation_warning to distinguish from warn (liblet internal function)

v1.8.0 (2025-03-13)

• Deprecated first, to extract an element from a set there is set.pop.
• Deprecated pyast2tree, not is the from_pyast factory method of Tree.
• Production if the rhs is the empty tuple or list is created as an epsilon
  rule.
• Added equals and hash to InstantaneousDescription that can be used to avoid
  loops in simulations.

v1.7.9 (2025-02-28)

• Updated conf.py because Sphinx does not like versions.html anymore.

v1.7.8 (2025-02-28)

• Updated .readthedocs.yml to include sphinx configuration.

v1.7.7 (2025-02-28)

• Updated ANTLR to 4.13.2.

v1.7.6 (2024-05-28)

• Tree.with_threads now shows labels for jumps different from next.

v1.7.5 (2024-04-12)

• Added the line number as attribute of the ANTLR annotated parse tree.
• Now TopDownInstantaneousDescription.predict does not put the ε on the stack.

v1.7.4 (2024-04-11)

• Added save and load to ANTLR and AnnotatedTreeWalker documentation.
• Now also table use "Fira Code" (and the font name is in liblet.const).

v1.7.3 (2024-04-04)

• Forgot to refactor tests.

v1.7.2 (2024-04-04)

• GVWrapper now uses "Fira Code" as default font.
• Improved InstantaneousDescription representations
• Fixed a bug in Tree graph representation.

v1.7.1 (2024-04-04)

• Added resized_svg_repr to liblet.display.
• Added svglib dependency (needed by resized_svg_repr).
• Improved GVWrapper in liblet.display.
• Added compose in liblet.utils.

v1.7.0a0 (2024-03-25)

• Removed support for Python < 3.10.
• All source are clean according to ruff.
• Big refactoring in liblet.display, favoring composition (with the new
  GVWrapper) over inheritance (of BaseGraph(ABC)).
• InstantaneousDescription now uses colors instead of unicode combining
  characters
• Minor cleanups and fixes.

v1.6.4a0 (2024-02-25)

• Here we are again: forcing publication.
• Removed bump2version config.

v1.6.4 (2024-02-25)

• Updated ANTLR to 4.13.1.

v1.6.3a1 (2023-04-04)

• Forcing publication.

v1.6.3a (2023-04-04)

• Removed a spurious sort in Talbe (columns), that induced an
  apparent error in FIRST/FOLLOW tables computation.

v1.6.2a (2023-02-25)

• Fixed the Readthedocs build.

v1.6.1a (2023-02-25)

• Using hatch for testing, tox gone forever.

v1.6.0a (2023-02-24)

• Migrated to Hatch (and pyproject.toml from setup.py).
• Updated to ANTLR to 4.12.0.
• Added GitHub Actions Status badge.
• Added testing for python 3.10.

v1.5.7-alpha (2022-05-30)

• Added html escamping to cell contents in Table.
• Added warning reporting when generating ANTLR files from grammar.
• Fixed a deprecation warning in some of the regexp.
• Added first to API documentation.
• Using tox instead of tox4.
• Updated antlr to 4.10.
• Using bump2version instead of the deprecated bumpversion.

v1.5.5-alpha (2022-03-18)

• The base element of a CYKTable is a set.
• Added installation of LLVM 11 to the gitpod Dockerfile.
• Updated documentation to the actually used versions of dependencies.
• CYKTable replaces cyk2table in documentation examples.
• Using GITHUB_WORKSPACE instead of hard wiring the path in GitHub workflow.

v1.5.4-alpha (2022-03-18)

• Introduced CYKTable (and deprecated cyk2table).

v1.5.3-alpha (2022-03-15)

• Automating the publish/release via GitHub Actions.

v1.5.3-alpha (2022-03-15)

• Productions now sorts the table rows (in production order).
• Updated examples to use Productions instead prods2table (now deprecated).
• Testing coverage is reported using Coveralls (instead of Codecov).

v1.5.2-alpha (2022-03-11)

• A new Productions class has been introduced to allow a nicer HTML
  representation of grammar productions.
• Added the Graph.neighbors method (to iterate on adjacency lists).
• Made Tree iterable (to allow for root and children unpakcing).
• Major code reformatting (now 2 spaces are used instead of 4).
• Cosmetic fixes (removing some stale imports and commited files).
• Now docs point to Gitpod (Binder is completely gone).

v1.5.1-alpha (2022-03-08)

• From binder to gitpod.
• Updated to the new graphviz api.
• Now sing GitHub Actions to run tests (instead of Travis).

v1.5.0-alpha (2022-02-11)

• Getting ready for the next year.
• Fixed unittest discover parameters.
• Updated dependency to ANTLR 4.9.3.

v1.4.2-alpha (2021-06-04)

• Emergency fix for LLVM toolchain detection code.

v1.4.1-alpha (2021-06-04)

• Added installation instructions related to the new LLVM module.
• Completely removed beaconing.
• Added support for tox testing (with Python 3.7, 3.8, and 3.9).

v1.4.0-alpha (2021-05-28)

• Added an experimental LLVM module to support IR code generation.
• AnnotatedTreeWalker.TREE_CATCHALL does not collect None subtrees.
• AnnotatedTreeWalker.register decorator trims ending _ (to allow builtin named
  keys).
• AnnotatedTreeWalker.register optionally takes the function name.
• Annotated trees now have an attr attribute defined as a AttrDict wrapping the
  root dict.
• Added AttrDict in liblet.utils.
• ANTLR.context and ANTLR.tree accept a antlr_hook parameter that allows
  complete configuration of the underlying lexer and parser.
• Stack and Queue now support reversed iteration.

v1.3.8-alpha (2021-05-06)

• The ANTLR and AnnotatedTreeWalker object can be serialized (suing the
  load/save methods).
• Added pyast2tree method to get a Tree from a Python ast.
• Annotated Tree rich display ignores dictionary keys starting with 'thread'.

v1.3.6-alpha (2021-05-03)

• Added src key to annotated trees produced by the tree method of
  ANTLR objects.
• Improved hash sign readability (defined the HASH constant equal to '\u266F',
  replacing previous '\uFF03')
• Derivation can now start from any nonterminal.

v1.3.3-alpha (2021-04-20)

• The display.side_by_side now accepts a single argument (and iterates
  over it).

v1.3.2-alpha (2021-04-19)

• Now TopDownInstantaneousDescription.match skips epsilon on the stack.
• Added the suffixes commodity function in utlis package.
• Minimal docs improvements.

v1.3.1-alpha (2021-04-11)

• InstantaneousDescription has been subclassed in two specilized classes:
  TopDownInstantaneousDescription and BottomUpInstantaneousDescription.
• Stack and Queues copy method has been deprecated in favor of more
  standard use of the copy module (the shallow copy obtains a separate
  storage by overriding copy).
• InstantaneousDescription and its subclasses shallow copies don't share
  the stack with the original object (obtained by overriding copy).
• Improved deprecations (now the warning module is used instead of raise).

v1.3.0-alpha (2021-04-10)

• Added a first version of the InstantaneousDescription class (in liblet.automata).
• Documentation improvement (substituted :obj: with :class: where appropriate).
• Bumped ANTLR version to 4.9.1.
• Created FUNDING.yml for GitHub sponsorship.

v1.2.3-beta (2020-05-07)

• To avoid confusion with peek of Stack and Queue, utils.peek has been
  deprecated in favor of utils.first.
• Updated Automaton and StateTransitionGraph to allow representing item
  set with frozenset instead of tuples.
• Modified utils.closure so that it always return the computed value,
  in this way if just one iteration is performed, the returned type
  coincides nonetheless with the type returned by the wrapped function.
• Fixing some graphviz visualization sizes.

v1.2.1-beta (2020-05-07)

• Added a missing import.

v1.2.0-beta (2020-05-07)

• Added a Table class.
• Small fixes to texts and docs.
• Added an introduction in the documentation to highlight the difference among
  words and strings.
• Added a workaround to have bordered HTML tables in Jupyter Lab.

v1.2.0-beta (2020-04-21)

• Bumped to beta.
• Added display.animate_derivation (and hence ipywidgets to the deps).
• Dderivation now admits productions and not only indexes.
• Added utils.uc to append unicode combination chars.
• Grammar.restrict_to now makes explicit that the start symbol must be kept and
  throws away productions containing also not specified terminals.

v1.1.0-alpha (2020-03-31)

• Now Derivation accepts also an iterable of steps (both for left/rightmost and
  general case).

v1.0.1-alpha (2020-03-26)

...

v1.10.0

Changelog

v1.10 (2025-03-27)

• Minor cleanups and improvements.
• Added Production.is_epsilon method.
• Added Productions.has_epsilon_productions method.
• Added Grammar.has_epsilon_productions method.
• Improved TopDownInstantaneousDescription and BottomUpInstantaneousDescription to handle
  epsilon productions.
• Added Tree.eq and Tree.hash methods (to allow Stack of trees comparison, required
  to avoid loops in simulations of automata combinations).

v1.9.1 (2025-03-24)

• Major rewriting of the HTML styles for tables (to improve VScode and Quarto compatibility).
• Added an embed_css function and a CUSTOM_CSS constant.
• Moved Table and CYKTable from liblet.utils to liblet.display.
• Introduced deprecation_warning to distinguish from warn (liblet internal function)

v1.8.0 (2025-03-13)

• Deprecated first, to extract an element from a set there is set.pop.
• Deprecated pyast2tree, not is the from_pyast factory method of Tree.
• Production if the rhs is the empty tuple or list is created as an epsilon
  rule.
• Added equals and hash to InstantaneousDescription that can be used to avoid
  loops in simulations.

v1.7.9 (2025-02-28)

• Updated conf.py because Sphinx does not like versions.html anymore.

v1.7.8 (2025-02-28)

• Updated .readthedocs.yml to include sphinx configuration.

v1.7.7 (2025-02-28)

• Updated ANTLR to 4.13.2.

v1.7.6 (2024-05-28)

• Tree.with_threads now shows labels for jumps different from next.

v1.7.5 (2024-04-12)

• Added the line number as attribute of the ANTLR annotated parse tree.
• Now TopDownInstantaneousDescription.predict does not put the ε on the stack.

v1.7.4 (2024-04-11)

• Added save and load to ANTLR and AnnotatedTreeWalker documentation.
• Now also table use "Fira Code" (and the font name is in liblet.const).

v1.7.3 (2024-04-04)

• Forgot to refactor tests.

v1.7.2 (2024-04-04)

• GVWrapper now uses "Fira Code" as default font.
• Improved InstantaneousDescription representations
• Fixed a bug in Tree graph representation.

v1.7.1 (2024-04-04)

• Added resized_svg_repr to liblet.display.
• Added svglib dependency (needed by resized_svg_repr).
• Improved GVWrapper in liblet.display.
• Added compose in liblet.utils.

v1.7.0a0 (2024-03-25)

• Removed support for Python < 3.10.
• All source are clean according to ruff.
• Big refactoring in liblet.display, favoring composition (with the new
  GVWrapper) over inheritance (of BaseGraph(ABC)).
• InstantaneousDescription now uses colors instead of unicode combining
  characters
• Minor cleanups and fixes.

v1.6.4a0 (2024-02-25)

• Here we are again: forcing publication.
• Removed bump2version config.

v1.6.4 (2024-02-25)

• Updated ANTLR to 4.13.1.

v1.6.3a1 (2023-04-04)

• Forcing publication.

v1.6.3a (2023-04-04)

• Removed a spurious sort in Talbe (columns), that induced an
  apparent error in FIRST/FOLLOW tables computation.

v1.6.2a (2023-02-25)

• Fixed the Readthedocs build.

v1.6.1a (2023-02-25)

• Using hatch for testing, tox gone forever.

v1.6.0a (2023-02-24)

• Migrated to Hatch (and pyproject.toml from setup.py).
• Updated to ANTLR to 4.12.0.
• Added GitHub Actions Status badge.
• Added testing for python 3.10.

v1.5.7-alpha (2022-05-30)

• Added html escamping to cell contents in Table.
• Added warning reporting when generating ANTLR files from grammar.
• Fixed a deprecation warning in some of the regexp.
• Added first to API documentation.
• Using tox instead of tox4.
• Updated antlr to 4.10.
• Using bump2version instead of the deprecated bumpversion.

v1.5.5-alpha (2022-03-18)

• The base element of a CYKTable is a set.
• Added installation of LLVM 11 to the gitpod Dockerfile.
• Updated documentation to the actually used versions of dependencies.
• CYKTable replaces cyk2table in documentation examples.
• Using GITHUB_WORKSPACE instead of hard wiring the path in GitHub workflow.

v1.5.4-alpha (2022-03-18)

• Introduced CYKTable (and deprecated cyk2table).

v1.5.3-alpha (2022-03-15)

• Automating the publish/release via GitHub Actions.

v1.5.3-alpha (2022-03-15)

• Productions now sorts the table rows (in production order).
• Updated examples to use Productions instead prods2table (now deprecated).
• Testing coverage is reported using Coveralls (instead of Codecov).

v1.5.2-alpha (2022-03-11)

• A new Productions class has been introduced to allow a nicer HTML
  representation of grammar productions.
• Added the Graph.neighbors method (to iterate on adjacency lists).
• Made Tree iterable (to allow for root and children unpakcing).
• Major code reformatting (now 2 spaces are used instead of 4).
• Cosmetic fixes (removing some stale imports and commited files).
• Now docs point to Gitpod (Binder is completely gone).

v1.5.1-alpha (2022-03-08)

• From binder to gitpod.
• Updated to the new graphviz api.
• Now sing GitHub Actions to run tests (instead of Travis).

v1.5.0-alpha (2022-02-11)

• Getting ready for the next year.
• Fixed unittest discover parameters.
• Updated dependency to ANTLR 4.9.3.

v1.4.2-alpha (2021-06-04)

• Emergency fix for LLVM toolchain detection code.

v1.4.1-alpha (2021-06-04)

• Added installation instructions related to the new LLVM module.
• Completely removed beaconing.
• Added support for tox testing (with Python 3.7, 3.8, and 3.9).

v1.4.0-alpha (2021-05-28)

• Added an experimental LLVM module to support IR code generation.
• AnnotatedTreeWalker.TREE_CATCHALL does not collect None subtrees.
• AnnotatedTreeWalker.register decorator trims ending _ (to allow builtin named
  keys).
• AnnotatedTreeWalker.register optionally takes the function name.
• Annotated trees now have an attr attribute defined as a AttrDict wrapping the
  root dict.
• Added AttrDict in liblet.utils.
• ANTLR.context and ANTLR.tree accept a antlr_hook parameter that allows
  complete configuration of the underlying lexer and parser.
• Stack and Queue now support reversed iteration.

v1.3.8-alpha (2021-05-06)

• The ANTLR and AnnotatedTreeWalker object can be serialized (suing the
  load/save methods).
• Added pyast2tree method to get a Tree from a Python ast.
• Annotated Tree rich display ignores dictionary keys starting with 'thread'.

v1.3.6-alpha (2021-05-03)

• Added src key to annotated trees produced by the tree method of
  ANTLR objects.
• Improved hash sign readability (defined the HASH constant equal to '\u266F',
  replacing previous '\uFF03')
• Derivation can now start from any nonterminal.

v1.3.3-alpha (2021-04-20)

• The display.side_by_side now accepts a single argument (and iterates
  over it).

v1.3.2-alpha (2021-04-19)

• Now TopDownInstantaneousDescription.match skips epsilon on the stack.
• Added the suffixes commodity function in utlis package.
• Minimal docs improvements.

v1.3.1-alpha (2021-04-11)

• InstantaneousDescription has been subclassed in two specilized classes:
  TopDownInstantaneousDescription and BottomUpInstantaneousDescription.
• Stack and Queues copy method has been deprecated in favor of more
  standard use of the copy module (the shallow copy obtains a separate
  storage by overriding copy).
• InstantaneousDescription and its subclasses shallow copies don't share
  the stack with the original object (obtained by overriding copy).
• Improved deprecations (now the warning module is used instead of raise).

v1.3.0-alpha (2021-04-10)

• Added a first version of the InstantaneousDescription class (in liblet.automata).
• Documentation improvement (substituted :obj: with :class: where appropriate).
• Bumped ANTLR version to 4.9.1.
• Created FUNDING.yml for GitHub sponsorship.

v1.2.3-beta (2020-05-07)

• To avoid confusion with peek of Stack and Queue, utils.peek has been
  deprecated in favor of utils.first.
• Updated Automaton and StateTransitionGraph to allow representing item
  set with frozenset instead of tuples.
• Modified utils.closure so that it always return the computed value,
  in this way if just one iteration is performed, the returned type
  coincides nonetheless with the type returned by the wrapped function.
• Fixing some graphviz visualization sizes.

v1.2.1-beta (2020-05-07)

• Added a missing import.

v1.2.0-beta (2020-05-07)

• Added a Table class.
• Small fixes to texts and docs.
• Added an introduction in the documentation to highlight the difference among
  words and strings.
• Added a workaround to have bordered HTML tables in Jupyter Lab.

v1.2.0-beta (2020-04-21)

• Bumped to beta.
• Added display.animate_derivation (and hence ipywidgets to the deps).
• Dderivation now admits productions and not only indexes.
• Added utils.uc to append unicode combination chars.
• Grammar.restrict_to now makes explicit that the start symbol must be kept and
  throws away productions containing also not specified terminals.

v1.1.0-alpha (2020-03-31)

• Now Derivation accepts also an iterable of steps (both for left/rightmost and
  general case).

v1.0.1-alpha (2020-03-26)

• Bumped ANTLR jar to version 4.8.
• Fixed a few typos in docs (thanks also...

v1.9.1

Changelog

v1.9.1 (2025-03-24)

• Major rewriting of the HTML styles for tables (to improve VScode and Quarto compatibility).
• Added an embed_css function and a CUSTOM_CSS constant.
• Moved Table and CYKTable from liblet.utils to liblet.display.
• Introduced deprecation_warning to distinguish from warn (liblet internal function)

v1.8.0 (2025-03-13)

• Deprecated first, to extract an element from a set there is set.pop.
• Deprecated pyast2tree, not is the from_pyast factory method of Tree.
• Production if the rhs is the empty tuple or list is created as an epsilon
  rule.
• Added equals and hash to InstantaneousDescription that can be used to avoid
  loops in simulations.

v1.7.9 (2025-02-28)

• Updated conf.py because Sphinx does not like versions.html anymore.

v1.7.8 (2025-02-28)

• Updated .readthedocs.yml to include sphinx configuration.

v1.7.7 (2025-02-28)

• Updated ANTLR to 4.13.2.

v1.7.6 (2024-05-28)

• Tree.with_threads now shows labels for jumps different from next.

v1.7.5 (2024-04-12)

• Added the line number as attribute of the ANTLR annotated parse tree.
• Now TopDownInstantaneousDescription.predict does not put the ε on the stack.

v1.7.4 (2024-04-11)

• Added save and load to ANTLR and AnnotatedTreeWalker documentation.
• Now also table use "Fira Code" (and the font name is in liblet.const).

v1.7.3 (2024-04-04)

• Forgot to refactor tests.

v1.7.2 (2024-04-04)

• GVWrapper now uses "Fira Code" as default font.
• Improved InstantaneousDescription representations
• Fixed a bug in Tree graph representation.

v1.7.1 (2024-04-04)

• Added resized_svg_repr to liblet.display.
• Added svglib dependency (needed by resized_svg_repr).
• Improved GVWrapper in liblet.display.
• Added compose in liblet.utils.

v1.7.0a0 (2024-03-25)

• Removed support for Python < 3.10.
• All source are clean according to ruff.
• Big refactoring in liblet.display, favoring composition (with the new
  GVWrapper) over inheritance (of BaseGraph(ABC)).
• InstantaneousDescription now uses colors instead of unicode combining
  characters
• Minor cleanups and fixes.

v1.6.4a0 (2024-02-25)

• Here we are again: forcing publication.
• Removed bump2version config.

v1.6.4 (2024-02-25)

• Updated ANTLR to 4.13.1.

v1.6.3a1 (2023-04-04)

• Forcing publication.

v1.6.3a (2023-04-04)

• Removed a spurious sort in Talbe (columns), that induced an
  apparent error in FIRST/FOLLOW tables computation.

v1.6.2a (2023-02-25)

• Fixed the Readthedocs build.

v1.6.1a (2023-02-25)

• Using hatch for testing, tox gone forever.

v1.6.0a (2023-02-24)

• Migrated to Hatch (and pyproject.toml from setup.py).
• Updated to ANTLR to 4.12.0.
• Added GitHub Actions Status badge.
• Added testing for python 3.10.

v1.5.7-alpha (2022-05-30)

• Added html escamping to cell contents in Table.
• Added warning reporting when generating ANTLR files from grammar.
• Fixed a deprecation warning in some of the regexp.
• Added first to API documentation.
• Using tox instead of tox4.
• Updated antlr to 4.10.
• Using bump2version instead of the deprecated bumpversion.

v1.5.5-alpha (2022-03-18)

• The base element of a CYKTable is a set.
• Added installation of LLVM 11 to the gitpod Dockerfile.
• Updated documentation to the actually used versions of dependencies.
• CYKTable replaces cyk2table in documentation examples.
• Using GITHUB_WORKSPACE instead of hard wiring the path in GitHub workflow.

v1.5.4-alpha (2022-03-18)

• Introduced CYKTable (and deprecated cyk2table).

v1.5.3-alpha (2022-03-15)

• Automating the publish/release via GitHub Actions.

v1.5.3-alpha (2022-03-15)

• Productions now sorts the table rows (in production order).
• Updated examples to use Productions instead prods2table (now deprecated).
• Testing coverage is reported using Coveralls (instead of Codecov).

v1.5.2-alpha (2022-03-11)

• A new Productions class has been introduced to allow a nicer HTML
  representation of grammar productions.
• Added the Graph.neighbors method (to iterate on adjacency lists).
• Made Tree iterable (to allow for root and children unpakcing).
• Major code reformatting (now 2 spaces are used instead of 4).
• Cosmetic fixes (removing some stale imports and commited files).
• Now docs point to Gitpod (Binder is completely gone).

v1.5.1-alpha (2022-03-08)

• From binder to gitpod.
• Updated to the new graphviz api.
• Now sing GitHub Actions to run tests (instead of Travis).

v1.5.0-alpha (2022-02-11)

• Getting ready for the next year.
• Fixed unittest discover parameters.
• Updated dependency to ANTLR 4.9.3.

v1.4.2-alpha (2021-06-04)

• Emergency fix for LLVM toolchain detection code.

v1.4.1-alpha (2021-06-04)

• Added installation instructions related to the new LLVM module.
• Completely removed beaconing.
• Added support for tox testing (with Python 3.7, 3.8, and 3.9).

v1.4.0-alpha (2021-05-28)

• Added an experimental LLVM module to support IR code generation.
• AnnotatedTreeWalker.TREE_CATCHALL does not collect None subtrees.
• AnnotatedTreeWalker.register decorator trims ending _ (to allow builtin named
  keys).
• AnnotatedTreeWalker.register optionally takes the function name.
• Annotated trees now have an attr attribute defined as a AttrDict wrapping the
  root dict.
• Added AttrDict in liblet.utils.
• ANTLR.context and ANTLR.tree accept a antlr_hook parameter that allows
  complete configuration of the underlying lexer and parser.
• Stack and Queue now support reversed iteration.

v1.3.8-alpha (2021-05-06)

• The ANTLR and AnnotatedTreeWalker object can be serialized (suing the
  load/save methods).
• Added pyast2tree method to get a Tree from a Python ast.
• Annotated Tree rich display ignores dictionary keys starting with 'thread'.

v1.3.6-alpha (2021-05-03)

• Added src key to annotated trees produced by the tree method of
  ANTLR objects.
• Improved hash sign readability (defined the HASH constant equal to '\u266F',
  replacing previous '\uFF03')
• Derivation can now start from any nonterminal.

v1.3.3-alpha (2021-04-20)

• The display.side_by_side now accepts a single argument (and iterates
  over it).

v1.3.2-alpha (2021-04-19)

• Now TopDownInstantaneousDescription.match skips epsilon on the stack.
• Added the suffixes commodity function in utlis package.
• Minimal docs improvements.

v1.3.1-alpha (2021-04-11)

• InstantaneousDescription has been subclassed in two specilized classes:
  TopDownInstantaneousDescription and BottomUpInstantaneousDescription.
• Stack and Queues copy method has been deprecated in favor of more
  standard use of the copy module (the shallow copy obtains a separate
  storage by overriding copy).
• InstantaneousDescription and its subclasses shallow copies don't share
  the stack with the original object (obtained by overriding copy).
• Improved deprecations (now the warning module is used instead of raise).

v1.3.0-alpha (2021-04-10)

• Added a first version of the InstantaneousDescription class (in liblet.automata).
• Documentation improvement (substituted :obj: with :class: where appropriate).
• Bumped ANTLR version to 4.9.1.
• Created FUNDING.yml for GitHub sponsorship.

v1.2.3-beta (2020-05-07)

• To avoid confusion with peek of Stack and Queue, utils.peek has been
  deprecated in favor of utils.first.
• Updated Automaton and StateTransitionGraph to allow representing item
  set with frozenset instead of tuples.
• Modified utils.closure so that it always return the computed value,
  in this way if just one iteration is performed, the returned type
  coincides nonetheless with the type returned by the wrapped function.
• Fixing some graphviz visualization sizes.

v1.2.1-beta (2020-05-07)

• Added a missing import.

v1.2.0-beta (2020-05-07)

• Added a Table class.
• Small fixes to texts and docs.
• Added an introduction in the documentation to highlight the difference among
  words and strings.
• Added a workaround to have bordered HTML tables in Jupyter Lab.

v1.2.0-beta (2020-04-21)

• Bumped to beta.
• Added display.animate_derivation (and hence ipywidgets to the deps).
• Dderivation now admits productions and not only indexes.
• Added utils.uc to append unicode combination chars.
• Grammar.restrict_to now makes explicit that the start symbol must be kept and
  throws away productions containing also not specified terminals.

v1.1.0-alpha (2020-03-31)

• Now Derivation accepts also an iterable of steps (both for left/rightmost and
  general case).

v1.0.1-alpha (2020-03-26)

• Bumped ANTLR jar to version 4.8.
• Fixed a few typos in docs (thanks also to @andreazube)

1.0.0-alpha (2019-05-28)

• Bumped the major version, non new features expected since this year class is done.
• Added the parameter fail_on_error to the liblet.antlr.ANTLR.context method to make
  it return None in case of parsing errors
• Modified the liblet.antlr.ANTLR.tree method so that it returns None in case of
  parse errors
• The liblet.antlr.ANTLR.tree method does not include nodes for the EOF token.

v0.12.4-alpha (2019-...

v1.8.0

Changelog

v1.8.0 (2025-03-xx)

• Deprecated first, to extract an element from a set there is set.pop.
• Deprecated pyast2tree, not is the from_pyast factory method of Tree.
• Production if the rhs is the empty tuple or list is created as an epsilon
  rule.
• Added equals and hash to InstantaneousDescription that can be used to avoid
  loops in simulations.

v1.7.9 (2025-02-28)

• Updated conf.py because Sphinx does not like versions.html anymore.

v1.7.8 (2025-02-28)

• Updated .readthedocs.yml to include sphinx configuration.

v1.7.7 (2025-02-28)

• Updated ANTLR to 4.13.2.

v1.7.6 (2024-05-28)

• Tree.with_threads now shows labels for jumps different from next.

v1.7.5 (2024-04-12)

• Added the line number as attribute of the ANTLR annotated parse tree.
• Now TopDownInstantaneousDescription.predict does not put the ε on the stack.

v1.7.4 (2024-04-11)

• Added save and load to ANTLR and AnnotatedTreeWalker documentation.
• Now also table use "Fira Code" (and the font name is in liblet.const).

v1.7.3 (2024-04-04)

• Forgot to refactor tests.

v1.7.2 (2024-04-04)

• GVWrapper now uses "Fira Code" as default font.
• Improved InstantaneousDescription representations
• Fixed a bug in Tree graph representation.

v1.7.1 (2024-04-04)

• Added resized_svg_repr to liblet.display.
• Added svglib dependency (needed by resized_svg_repr).
• Improved GVWrapper in liblet.display.
• Added compose in liblet.utils.

v1.7.0a0 (2024-03-25)

• Removed support for Python < 3.10.
• All source are clean according to ruff.
• Big refactoring in liblet.display, favoring composition (with the new
  GVWrapper) over inheritance (of BaseGraph(ABC)).
• InstantaneousDescription now uses colors instead of unicode combining
  characters
• Minor cleanups and fixes.

v1.6.4a0 (2024-02-25)

• Here we are again: forcing publication.
• Removed bump2version config.

v1.6.4 (2024-02-25)

• Updated ANTLR to 4.13.1.

v1.6.3a1 (2023-04-04)

• Forcing publication.

v1.6.3a (2023-04-04)

• Removed a spurious sort in Talbe (columns), that induced an
  apparent error in FIRST/FOLLOW tables computation.

v1.6.2a (2023-02-25)

• Fixed the Readthedocs build.

v1.6.1a (2023-02-25)

• Using hatch for testing, tox gone forever.

v1.6.0a (2023-02-24)

• Migrated to Hatch (and pyproject.toml from setup.py).
• Updated to ANTLR to 4.12.0.
• Added GitHub Actions Status badge.
• Added testing for python 3.10.

v1.5.7-alpha (2022-05-30)

• Added html escamping to cell contents in Table.
• Added warning reporting when generating ANTLR files from grammar.
• Fixed a deprecation warning in some of the regexp.
• Added first to API documentation.
• Using tox instead of tox4.
• Updated antlr to 4.10.
• Using bump2version instead of the deprecated bumpversion.

v1.5.5-alpha (2022-03-18)

• The base element of a CYKTable is a set.
• Added installation of LLVM 11 to the gitpod Dockerfile.
• Updated documentation to the actually used versions of dependencies.
• CYKTable replaces cyk2table in documentation examples.
• Using GITHUB_WORKSPACE instead of hard wiring the path in GitHub workflow.

v1.5.4-alpha (2022-03-18)

• Introduced CYKTable (and deprecated cyk2table).

v1.5.3-alpha (2022-03-15)

• Automating the publish/release via GitHub Actions.

v1.5.3-alpha (2022-03-15)

• Productions now sorts the table rows (in production order).
• Updated examples to use Productions instead prods2table (now deprecated).
• Testing coverage is reported using Coveralls (instead of Codecov).

v1.5.2-alpha (2022-03-11)

• A new Productions class has been introduced to allow a nicer HTML
  representation of grammar productions.
• Added the Graph.neighbors method (to iterate on adjacency lists).
• Made Tree iterable (to allow for root and children unpakcing).
• Major code reformatting (now 2 spaces are used instead of 4).
• Cosmetic fixes (removing some stale imports and commited files).
• Now docs point to Gitpod (Binder is completely gone).

v1.5.1-alpha (2022-03-08)

• From binder to gitpod.
• Updated to the new graphviz api.
• Now sing GitHub Actions to run tests (instead of Travis).

v1.5.0-alpha (2022-02-11)

• Getting ready for the next year.
• Fixed unittest discover parameters.
• Updated dependency to ANTLR 4.9.3.

v1.4.2-alpha (2021-06-04)

• Emergency fix for LLVM toolchain detection code.

v1.4.1-alpha (2021-06-04)

• Added installation instructions related to the new LLVM module.
• Completely removed beaconing.
• Added support for tox testing (with Python 3.7, 3.8, and 3.9).

v1.4.0-alpha (2021-05-28)

• Added an experimental LLVM module to support IR code generation.
• AnnotatedTreeWalker.TREE_CATCHALL does not collect None subtrees.
• AnnotatedTreeWalker.register decorator trims ending _ (to allow builtin named
  keys).
• AnnotatedTreeWalker.register optionally takes the function name.
• Annotated trees now have an attr attribute defined as a AttrDict wrapping the
  root dict.
• Added AttrDict in liblet.utils.
• ANTLR.context and ANTLR.tree accept a antlr_hook parameter that allows
  complete configuration of the underlying lexer and parser.
• Stack and Queue now support reversed iteration.

v1.3.8-alpha (2021-05-06)

• The ANTLR and AnnotatedTreeWalker object can be serialized (suing the
  load/save methods).
• Added pyast2tree method to get a Tree from a Python ast.
• Annotated Tree rich display ignores dictionary keys starting with 'thread'.

v1.3.6-alpha (2021-05-03)

• Added src key to annotated trees produced by the tree method of
  ANTLR objects.
• Improved hash sign readability (defined the HASH constant equal to '\u266F',
  replacing previous '\uFF03')
• Derivation can now start from any nonterminal.

v1.3.3-alpha (2021-04-20)

• The display.side_by_side now accepts a single argument (and iterates
  over it).

v1.3.2-alpha (2021-04-19)

• Now TopDownInstantaneousDescription.match skips epsilon on the stack.
• Added the suffixes commodity function in utlis package.
• Minimal docs improvements.

v1.3.1-alpha (2021-04-11)

• InstantaneousDescription has been subclassed in two specilized classes:
  TopDownInstantaneousDescription and BottomUpInstantaneousDescription.
• Stack and Queues copy method has been deprecated in favor of more
  standard use of the copy module (the shallow copy obtains a separate
  storage by overriding copy).
• InstantaneousDescription and its subclasses shallow copies don't share
  the stack with the original object (obtained by overriding copy).
• Improved deprecations (now the warning module is used instead of raise).

v1.3.0-alpha (2021-04-10)

• Added a first version of the InstantaneousDescription class (in liblet.automata).
• Documentation improvement (substituted :obj: with :class: where appropriate).
• Bumped ANTLR version to 4.9.1.
• Created FUNDING.yml for GitHub sponsorship.

v1.2.3-beta (2020-05-07)

• To avoid confusion with peek of Stack and Queue, utils.peek has been
  deprecated in favor of utils.first.
• Updated Automaton and StateTransitionGraph to allow representing item
  set with frozenset instead of tuples.
• Modified utils.closure so that it always return the computed value,
  in this way if just one iteration is performed, the returned type
  coincides nonetheless with the type returned by the wrapped function.
• Fixing some graphviz visualization sizes.

v1.2.1-beta (2020-05-07)

• Added a missing import.

v1.2.0-beta (2020-05-07)

• Added a Table class.
• Small fixes to texts and docs.
• Added an introduction in the documentation to highlight the difference among
  words and strings.
• Added a workaround to have bordered HTML tables in Jupyter Lab.

v1.2.0-beta (2020-04-21)

• Bumped to beta.
• Added display.animate_derivation (and hence ipywidgets to the deps).
• Dderivation now admits productions and not only indexes.
• Added utils.uc to append unicode combination chars.
• Grammar.restrict_to now makes explicit that the start symbol must be kept and
  throws away productions containing also not specified terminals.

v1.1.0-alpha (2020-03-31)

• Now Derivation accepts also an iterable of steps (both for left/rightmost and
  general case).

v1.0.1-alpha (2020-03-26)

• Bumped ANTLR jar to version 4.8.
• Fixed a few typos in docs (thanks also to @andreazube)

1.0.0-alpha (2019-05-28)

• Bumped the major version, non new features expected since this year class is done.
• Added the parameter fail_on_error to the liblet.antlr.ANTLR.context method to make
  it return None in case of parsing errors
• Modified the liblet.antlr.ANTLR.tree method so that it returns None in case of
  parse errors
• The liblet.antlr.ANTLR.tree method does not include nodes for the EOF token.

v0.12.4-alpha (2019-05-28)

• The liblet.display.Tree.with_threads method puts nodes at the same rank according to
  their depth in the tree.
• The liblet.antlr.ANTLR.tree method ignores tokens for non simple trees.

v0.12.3-alpha (2019-05-28)

• Added new documentation for recently added classes and ...