step21.js
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step21.js
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	/*
	Language: STEP Part 21
	Contributors: Adam Joseph Cook <adam.joseph.cook@gmail.com>
	Description: Syntax highlighter for STEP Part 21 files (ISO 10303-21).
	Website: https://en.wikipedia.org/wiki/ISO_10303-21
	*/

	function step21(hljs) {
	const STEP21_IDENT_RE = '[A-Z_][A-Z0-9_.]*';
	const STEP21_KEYWORDS = {
	$pattern: STEP21_IDENT_RE,
	keyword: [
	"HEADER",
	"ENDSEC",
	"DATA"
	]
	};
	const STEP21_START = {
	className: 'meta',
	begin: 'ISO-10303-21;',
	relevance: 10
	};
	const STEP21_CLOSE = {
	className: 'meta',
	begin: 'END-ISO-10303-21;',
	relevance: 10
	};

	return {
	name: 'STEP Part 21',
	aliases: [
	'p21',
	'step',
	'stp'
	],
	case_insensitive: true, // STEP 21 is case insensitive in theory, in practice all non-comments are capitalized.
	keywords: STEP21_KEYWORDS,
	contains: [
	STEP21_START,
	STEP21_CLOSE,
	hljs.C_LINE_COMMENT_MODE,
	hljs.C_BLOCK_COMMENT_MODE,
	hljs.COMMENT('/\\\\!', '\\*/'),
	hljs.C_NUMBER_MODE,
	hljs.inherit(hljs.APOS_STRING_MODE, { illegal: null }),
	hljs.inherit(hljs.QUOTE_STRING_MODE, { illegal: null }),
	{
	className: 'string',
	begin: "'",
	end: "'"
	},
	{
	className: 'symbol',
	variants: [
	{
	begin: '#',
	end: '\\d+',
	illegal: '\\W'
	}
	]
	}
	]
	};
	}

	module.exports = step21;