codemirror-lang-snobol

SNOBOL4 syntax highlighting for CodeMirror 6, targeting the Snoflake dialect. It is case-insensitive and supports backtick-delimited multi-line literals, which in Snoflake carry inline JavaScript: those ranges are highlighted as JavaScript in place.

It is built on a Lezer grammar (src/syntax.grammar). SNOBOL4 highlighting does not need a full parse — a blank is at once the concatenation operator and the field separator, which no context-free grammar untangles — so the grammar keeps the program a flat token stream and pushes the one context-sensitive rule, column-one card classification, into a small external tokenizer (src/tokens.js). The backtick literal is handed to the JavaScript parser via parseMixed.

Install

npm install codemirror-lang-snobol

The CodeMirror packages are peer dependencies.

Use

import { basicSetup, EditorView } from "codemirror";
import { snobol } from "codemirror-lang-snobol";

new EditorView({
  doc: "       OUTPUT = 'HELLO, WORLD'\nEND\n",
  extensions: [basicSetup, snobol()],
  parent: document.body,
});

License

BSD-2-Clause