vscode-ebnf

{
	"scopeName": "markdown.ebnf.codeblock",
	"fileTypes": [],
	"injectionSelector": "L:markup.fenced_code.block.markdown",
	"patterns": [
		{
			"include": "#ebnf-code-block"
		}
	],
	"repository": {
		"ebnf-code-block": {
			"begin": "(?<=[`~])ebnf(\\s+[^`~]*)?$",
			"end": "(^|\\G)(?=\\s*[`~]{3,}\\s*$)",
			"patterns": [
				{
					"begin": "(^|\\G)(\\s*)(.*)",
					"while": "(^|\\G)(?!\\s*([`~]{3,})\\s*$)",
					"contentName": "meta.embedded.block.ebnf",
					"patterns": [
						{
							"include": "text.ebnf"
						}
					]
				}
			]
		}
	}
}