xegaBNF
Compile a Backus-Naur Form Specification into an R Grammar Object
Description
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).
Downloads
568
Last 30 days
6481st
1.8K
Last 90 days
7.2K
Last year
Trend: -3.2% (30d vs prior 30d)
0
Last 30 days
24
Last 90 days
95
Last year
Trend: -100% (30d vs prior 30d)
5
Last 7 days
6
Last 30 days
0
All-time
autoCRAN-only: this name is served only by autoCRAN, so the count is exact.
CRAN Check Status
Show all 13 flavors
| Flavor | Status |
|---|---|
| r-devel-linux-x86_64-debian-clang | OK |
| r-devel-linux-x86_64-debian-gcc | OK |
| r-devel-linux-x86_64-fedora-clang | OK |
| r-devel-linux-x86_64-fedora-gcc | OK |
| r-devel-windows-x86_64 | OK |
| r-oldrel-macos-arm64 | OK |
| r-oldrel-macos-x86_64 | OK |
| r-oldrel-windows-x86_64 | OK |
| r-patched-linux-x86_64 | OK |
| r-release-linux-x86_64 | OK |
| r-release-macos-arm64 | OK |
| r-release-macos-x86_64 | OK |
| r-release-windows-x86_64 | OK |
Check History
OK 13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Jun 8, 2026
ERROR 12 OK · 0 NOTE · 0 WARNING · 1 ERROR · 0 FAILURE Jun 7, 2026
Rd files
cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot open the connection cannot ...[truncated]... ndGrid.Rd’, ‘expandRules.Rd’, ‘findNextRuleForExpansion.Rd’, ‘finiteRulesOfG.Rd’, ‘isNonTerminal.Rd’, ‘makeProductionTable.Rd’, ‘makeRule.Rd’, ‘makeStartSymbol.Rd’, ‘makeSymbolTable.Rd’, ‘nonTerminalsOfG.Rd’, ‘pastePart.Rd’, ‘preBNF.Rd’, ‘printPT.Rd’
OK 14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
Code & tests
Open call graph →Code intelligence has not been computed for this package yet.
Code
Structure
Lines of code
3,034
Files
53
Compiled share
0%
Has compiled src
No
Language breakdown
API
Exported functions
36
Internal functions
1
Recent export changes
Testing & CI
Has tests
Yes
Test-to-code ratio
0.10
testthat edition
–
CI present
No
CI type
[]
PR gated
No
Docs
Return-value doc rate
100%
\dontrun example ratio
0%
Roxygen coverage
100%
Has pkgdown
No
NEWS present
Yes
Health & Security signals
Informational signals; not verdicts.
on.exit coverage
0%
Unsafe pattern score
3
Dep constraint coverage
–
Secret pattern count
0
Bundled 3rd-party code
2 items
Portability & License
Min R version
–
System requirements
–
C++ standard
–
License
MIT + file LICENSE
License flags
SPDX valid, OSI approved
History
Versions
2
First release
2024-02-05
Latest release
2025-04-17
Avg cadence
437 days
Cold removal rate
–
Dep drift
0
LOC over versions
Per-file churn detail lives in the source pipeline: https://github.com/r-observatory/cran-code-metrics.