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Prism.languages.perl = {
	'comment': [
		{
			// POD
			pattern: /((?:^|\n)\s*)=\w+[\s\S]*?=cut.*/,
			lookbehind: true
		},
		{
			pattern: /(^|[^\\$])#.*?(\r?\n|$)/,
			lookbehind: true
		}
	],
	// TODO Could be nice to handle Heredoc too.
	'string': [
		// q/.../
		/\b(?:q|qq|qx|qw)\s*([^a-zA-Z0-9\s\{\(\[<])(\\?.)*?\s*\1/,
	
		// q a...a
		/\b(?:q|qq|qx|qw)\s+([a-zA-Z0-9])(\\?.)*?\s*\1/,
	
		// q(...)
		/\b(?:q|qq|qx|qw)\s*\(([^()]|\\.)*\s*\)/,
	
		// q{...}
		/\b(?:q|qq|qx|qw)\s*\{([^{}]|\\.)*\s*\}/,
	
		// q[...]
		/\b(?:q|qq|qx|qw)\s*\[([^[\]]|\\.)*\s*\]/,
	
		// q<...>
		/\b(?:q|qq|qx|qw)\s*<([^<>]|\\.)*\s*>/,

		// "...", '...', `...`
		/("|'|`)(\\?.)*?\1/
	],
	'regex': [
		// m/.../
		/\b(?:m|qr)\s*([^a-zA-Z0-9\s\{\(\[<])(\\?.)*?\s*\1[msixpodualgc]*/,
	
		// m a...a
		/\b(?:m|qr)\s+([a-zA-Z0-9])(\\?.)*?\s*\1[msixpodualgc]*/,
	
		// m(...)
		/\b(?:m|qr)\s*\(([^()]|\\.)*\s*\)[msixpodualgc]*/,
	
		// m{...}
		/\b(?:m|qr)\s*\{([^{}]|\\.)*\s*\}[msixpodualgc]*/,
	
		// m[...]
		/\b(?:m|qr)\s*\[([^[\]]|\\.)*\s*\][msixpodualgc]*/,
	
		// m<...>
		/\b(?:m|qr)\s*<([^<>]|\\.)*\s*>[msixpodualgc]*/,
	
		// s/.../.../
		/\b(?:s|tr|y)\s*([^a-zA-Z0-9\s\{\(\[<])(\\?.)*?\s*\1\s*((?!\1).|\\.)*\s*\1[msixpodualgcer]*/,
	
		// s a...a...a
		/\b(?:s|tr|y)\s+([a-zA-Z0-9])(\\?.)*?\s*\1\s*((?!\1).|\\.)*\s*\1[msixpodualgcer]*/,
	
		// s(...)(...)
		/\b(?:s|tr|y)\s*\(([^()]|\\.)*\s*\)\s*\(\s*([^()]|\\.)*\s*\)[msixpodualgcer]*/,
	
		// s{...}{...}
		/\b(?:s|tr|y)\s*\{([^{}]|\\.)*\s*\}\s*\{\s*([^{}]|\\.)*\s*\}[msixpodualgcer]*/,
	
		// s[...][...]
		/\b(?:s|tr|y)\s*\[([^[\]]|\\.)*\s*\]\s*\[\s*([^[\]]|\\.)*\s*\][msixpodualgcer]*/,
	
		// s<...><...>
		/\b(?:s|tr|y)\s*<([^<>]|\\.)*\s*>\s*<\s*([^<>]|\\.)*\s*>[msixpodualgcer]*/,
	
		// /.../
		/\/(\[.+?]|\\.|[^\/\r\n])*\/[msixpodualgc]*(?=\s*($|[\r\n,.;})&|\-+*=~<>!?^]|(lt|gt|le|ge|eq|ne|cmp|not|and|or|xor|x)\b))/
	],

	// FIXME Not sure about the handling of ::, ', and #
	'variable': [
		// ${^POSTMATCH}
		/[&*\$@%]\{\^[A-Z]+\}/,
		// $^V
		/[&*\$@%]\^[A-Z_]/,
		// ${...}
		/[&*\$@%]#?(?=\{)/,
		// $foo
		/[&*\$@%]#?((::)*'?(?!\d)[\w$]+)+(::)*/i,
		// $1
		/[&*\$@%]\d+/,
		// $_, @_, %!
		/[\$@%][!"#\$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~]/
	],
	'filehandle': {
		// <>, , _
		pattern: /<(?!=).*>|\b_\b/,
		alias: 'symbol'
	},
	'vstring': {
		// v1.2, 1.2.3
		pattern: /v\d+(\.\d+)*|\d+(\.\d+){2,}/,
		alias: 'string'
	},
	'function': {
		pattern: /sub [a-z0-9_]+/i,
		inside: {
			keyword: /sub/
		}
	},
	'keyword': /\b(any|break|continue|default|delete|die|do|else|elsif|eval|for|foreach|given|goto|if|last|local|my|next|our|package|print|redo|require|say|state|sub|switch|undef|unless|until|use|when|while)\b/,
	'number': /(\n|\b)-?(0x[\dA-Fa-f](_?[\dA-Fa-f])*|0b[01](_?[01])*|(\d(_?\d)*)?\.?\d(_?\d)*([Ee]-?\d+)?)\b/,
	'operator': /-[rwxoRWXOezsfdlpSbctugkTBMAC]\b|[-+*=~\/|&]{1,2}|<=?|>=?|\.{1,3}|[!?\\^]|\b(lt|gt|le|ge|eq|ne|cmp|not|and|or|xor|x)\b/,
	'punctuation': /[{}[\];(),:]/
};