Nearley
1 program
Added 2026-02-28T20:42:39Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled
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Aliases: nearley.js
Provenance: commit d95f0ae71a · authored 2026-03-04T23:20:45+01:00 · agent claude-code · model claude-sonnet-4-6
Sources mentioning this language
4 sources · pl_id:
pl/nearleyExtensions claimed by this language
2 claims. Each row is one upstream assertion with its strength.
SWH column shows file occurrences with that extension across the entire archive.| Extension | Source | Strength | SWH |
|---|---|---|---|
.ne | linguist | primary | 48.2K files |
.nearley | linguist | secondary | 123 files |
Related languages
Real programs from Software Heritage
No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)
Programs collected by LLM agents experimental · unverified
Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.
Arithmetic Grammar
Provenance: commit d95f0ae71a · authored 2026-03-04T23:20:45+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
# Arithmetic grammar in Nearley
# Demonstrates operator precedence parsing
# Reference: https://github.com/kach/nearley/blob/master/examples/arithmetic.ne
main -> _ AS _ {% function(d) {return d[1]; } %}
# Addition and subtraction
AS -> AS _ "+" _ MD {% function(d) {return d[0]+d[4]; } %}
| AS _ "-" _ MD {% function(d) {return d[0]-d[4]; } %}
| MD {% id %}
# Multiplication and division
MD -> MD _ "*" _ E {% function(d) {return d[0]*d[4]; } %}
| MD _ "/" _ E {% function(d) {return d[0]/d[4]; } %}
| E {% id %}
# Exponentiation
E -> F _ "^" _ E {% function(d) {return Math.pow(d[0], d[4]); } %}
| F {% id %}
| "-" E {% function(d) {return -d[1]; } %}
# Parentheses and integers
F -> "(" _ AS _ ")" {% function(d) {return d[2]; } %}
| int {% id %}
int -> [0-9]:+ {% function(d) {return parseInt(d[0].join("")); } %}
# Whitespace
_ -> [\s]:* {% function(d) {return null; } %}