R Observatory: Metrics for xegaBNF version 1.0.0.5

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

xegaBNF

1.0.0.5Package record

Compile a Backus-Naur Form Specification into an R Grammar Object

4packages depend

6.2Kdownloads / year

55.6%test coverage

13/13flavors OK

Overview

About

Maintained by Andreas Geyer-SchulzCRAN page ↗GitHub ↗

Translates a BNF (Backus-Naur Form) specification of a context-free language into an R grammar object which consists of the start symbol, the symbol table, the production table, and a short production table. The short production table is non-recursive. The grammar object contains the file name from which it was generated (without a path). In addition, it provides functions to determine the type of a symbol (isTerminal() and isNonterminal()) and functions to access the production table (rules() and derives()). For the BNF specification, see Backus, John et al. (1962) "Revised Report on the Algorithmic Language ALGOL 60". (ALGOL60 standards page http://www.algol60.org/2standards.htm, html-edition https://www.masswerk.at/algol60/report.htm) A preprocessor for macros which expand to standard BNF is included. The grammar compiler is an extension of the APL2 implementation in Geyer-Schulz, Andreas (1997, ISBN:978-3-7908-0830-X).

Changes in 1.0.0.5

dataframePT(): Return a production table as a (readable) dataframe.

From NEWS in the release

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("xegaBNF", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("ageyerschulz/xegaBNF")

Development version from ageyerschulz/xegaBNF. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-xegabnf

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-xegaBNF

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-xegaBNF

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 1.0 min · r-oldrel-windows-x86_64

Status changes

OK13 OK2026-08-04
NOTE12 OK, 1 NOTE2026-08-01
OK13 OK2026-06-08
ERROR12 OK, 1 ERROR2026-06-07
OK14 OK2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 1.0.0.5

READMEYes · 250 wordsVignettesNoNEWSYes · 67% structured · mentions 1.0.0.5Citation fileNoWebsitenot declared in DESCRIPTION

Help pages: 37includes a package overview page
Examples that run: 100%36 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 100%
Help pages citing references: 8%

How these are measured

Downloads

6.2K

CRAN downloads in the past year

Rank #11,105 · ~17/day · ~516/mo

Releases R versions

Daily download trend is not available in this view yet.

35030 days

96090 days

6.2K1 year

Compare downloads with other packages →

Also on80 r2u1 autocran

How downloads are counted

Repository

ageyerschulz/xegabnf ↗Account: ageyerschulz

0Stars

0Forks

0Open issues

0Open PRs

0Releases

Last activity 2026-09-07

Responsiveness

not measured

How these are measured

PracticesBeta

Checks run against github.com/ageyerschulz/xegabnf on 2026-10-21.

No development-tooling practices detected in the upstream repository.

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

1 external dependency (excludes base and recommended)

Installing xegaBNF adds no packages beyond those that come with R.

Depends (0)

none

Imports (0)

none

LinkingTo (0)

none

Suggests (1)

testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

0indirect

Imports 4

Depends, Imports or LinkingTo, most downloaded first

xegaGpGene xegaGeGene xega xegaDerivationTrees

How these are counted

Code & Tests

People & History

People (1)

Andreas Geyer-Schulz

Author, Maintainer since 1.0.0.0 (2024)

Releases (2)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
1.0.0.5Latest
record
2025-04-17 · current release · diff ↗ ·
added 20 exports
allTerminal, bindKvariables, booleanGrammarK, cL, dataframePT, directRecursion, evenMacro, existsMacro, expandGrid, expandRules, findNextRuleForExpansion, finiteRulesOfG, newPT, nonTerminalsOfG, pastePart, preBNF, printPT, smallestRules, variableNamesBNF, variableNamesLHS
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
1.0.0.0
record
2024-02-05
R
R 4.3.0 released · 2023-04-21

Package metadata

First published: 2024-02-05
Total releases: 2 / 2 yrs
License: MIT + file LICENSE OSI
Download size: 24 KB

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("xegaBNF")

Format

Geyer-Schulz, A. (2025). xegaBNF: Compile a Backus-Naur Form Specification into an R Grammar Object (Version 1.0.0.5) [Computer software]. https://doi.org/10.32614/CRAN.package.xegaBNF

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for xegaBNF version 1.0.0.5 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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