Prism.languages.iecst = {
	'comment': [
		{
			pattern: /(^|[^\\])(?:\/\*[\s\S]*?(?:\*\/|$)|\(\*[\s\S]*?(?:\*\)|$)|\{[\s\S]*?(?:\}|$))/,
			lookbehind: true,
		},
		{
			pattern: /(^|[^\\:])\/\/.*/,
			lookbehind: true,
			greedy: true,
		},
	],
	'string': {
		pattern: /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,
		greedy: true,
	},
	'class-name': /\b(?:END_)?(?:PROGRAM|CONFIGURATION|INTERFACE|FUNCTION_BLOCK|FUNCTION|ACTION|TRANSITION|TYPE|STRUCT|(?:INITIAL_)?STEP|NAMESPACE|LIBRARY|CHANNEL|FOLDER|RESOURCE|VAR_(?:GLOBAL|INPUT|PUTPUT|IN_OUT|ACCESS|TEMP|EXTERNAL|CONFIG)|VAR|METHOD|PROPERTY)\b/i,
	'keyword': /\b(?:(?:END_)?(?:IF|WHILE|REPEAT|CASE|FOR)|ELSE|FROM|THEN|ELSIF|DO|TO|BY|PRIVATE|PUBLIC|PROTECTED|CONSTANT|RETURN|EXIT|CONTINUE|GOTO|JMP|AT|RETAIN|NON_RETAIN|TASK|WITH|UNTIL|USING|EXTENDS|IMPLEMENTS|GET|SET|__TRY|__CATCH|__FINALLY|__ENDTRY)\b/,
	'variable': /\b(?:AT|BOOL|BYTE|(?:D|L)?WORD|U?(?:S|D|L)?INT|L?REAL|TIME(?:_OF_DAY)?|TOD|DT|DATE(?:_AND_TIME)?|STRING|ARRAY|ANY|POINTER)\b/,
	'symbol': /%[IQM][XBWDL][\d.]*|%[IQ][\d.]*/,
	'number': /\b(?:16#[\da-f]+|2#[01_]+|0x[\da-f]+)\b|\b(?:T|D|DT|TOD)#[\d_shmd:]*|\b[A-Z]*\#[\d.,_]*|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,
	'boolean': /\b(?:TRUE|FALSE|NULL)\b/,
	'function': /\w+(?=\()/,
	'operator': /(?:S?R?:?=>?|&&?|\*\*?|<=?|>=?|[-:^/+])|\b(?:OR|AND|MOD|NOT|XOR|LE|GE|EQ|NE|GE|LT)\b/,
	'punctuation': /[();]/,
	'type': {
		'pattern': /#/,
		'alias': 'selector',
	},
};