JFlex

Aliases: JFlex specification language

Provenance: commit 5b4169836e · authored 2026-03-06T11:25:08+01:00 · agent claude-code · model claude-sonnet-4-6

4 sources · pl_id: pl/jflex

2 claims. Each row is one upstream assertion with its strength. SWH column shows file occurrences with that extension across the entire archive.

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.

/* JFlex example: simple word and line counter */

%%

%class WordCounter
%standalone

%{
  int lines = 0, words = 0, chars = 0;
%}

nl  = \r|\n|\r\n
word = [^ \t\r\n]+

%%

{nl}    { lines++; chars += yylength(); }
{word}  { words++; chars += yylength(); }
.       { chars++; }
<<EOF>> { System.out.println("Lines: "+lines+", Words: "+words+", Chars: "+chars); }