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Prism.languages['excel-formula'] = {
	'comment': {
		pattern: /(\bN\(\s*)"(?:[^"]|"")*"(?=\s*\))/i,
		lookbehind: true,
		greedy: true
	},
	'string': {
		pattern: /"(?:[^"]|"")*"(?!")/,
		greedy: true
	},
	'reference': {
		// https://www.ablebits.com/office-addins-blog/2015/12/08/excel-reference-another-sheet-workbook/

		// Sales!B2
		// 'Winter sales'!B2
		// [Sales.xlsx]Jan!B2:B5
		// D:\Reports\[Sales.xlsx]Jan!B2:B5
		// '[Sales.xlsx]Jan sales'!B2:B5
		// 'D:\Reports\[Sales.xlsx]Jan sales'!B2:B5

		pattern: /(?:'[^']*'|(?:[^\s()[\]{}<>*?"';,$&]*\[[^^\s()[\]{}<>*?"']+\])?\w+)!/,
		greedy: true,
		alias: 'string',
		inside: {
			'operator': /!$/,
			'punctuation': /'/,
			'sheet': {
				pattern: /[^[\]]+$/,
				alias: 'function'
			},
			'file': {
				pattern: /\[[^[\]]+\]$/,
				inside: {
					'punctuation': /[[\]]/
				}
			},
			'path': /[\s\S]+/
		}
	},
	'function-name': {
		pattern: /\b[A-Z]\w*(?=\()/i,
		alias: 'builtin'
	},
	'range': {
		pattern: /\$?\b(?:[A-Z]+\$?\d+:\$?[A-Z]+\$?\d+|[A-Z]+:\$?[A-Z]+|\d+:\$?\d+)\b/i,
		alias: 'selector',
		inside: {
			'operator': /:/,
			'cell': /\$?[A-Z]+\$?\d+/i,
			'column': /\$?[A-Z]+/i,
			'row': /\$?\d+/
		}
	},
	'cell': {
		// Excel is case insensitive, so the string "foo1" could be either a variable or a cell.
		// To combat this, we match cells case insensitive, if the contain at least one "$", and case sensitive otherwise.
		pattern: /\b[A-Z]+\d+\b|\$[A-Za-z]+\$?\d+\b|\b[A-Za-z]+\$\d+\b/,
		alias: 'selector'
	},
	'number': /(?:\b\d+(?:\.\d+)?|\B\.\d+)(?:e[+-]?\d+)?\b/i,
	'boolean': /\b(?:FALSE|TRUE)\b/i,
	'operator': /[-+*/^%=&,]|<[=>]?|>=?/,
	'punctuation': /[[\]();{}|]/
};

Prism.languages['xlsx'] = Prism.languages['xls'] = Prism.languages['excel-formula'];
kmx.io/prism.js/components/prism-excel-formula.js

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components/prism-excel-formula.js
