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Prism.languages.groovy = Prism.languages.extend('clike', {
	'keyword': /\b(as|def|in|abstract|assert|boolean|break|byte|case|catch|char|class|const|continue|default|do|double|else|enum|extends|final|finally|float|for|goto|if|implements|import|instanceof|int|interface|long|native|new|package|private|protected|public|return|short|static|strictfp|super|switch|synchronized|this|throw|throws|trait|transient|try|void|volatile|while)\b/,
	'string': [
		{
			pattern: /("""|''')[\s\S]*?\1|(\$\/)(\$\/\$|[\s\S])*?\/\$/,
			greedy: true
		},
		{
			pattern: /("|'|\/)(?:\\?.)*?\1/,
			greedy: true
		}
	],
	'number': /\b(?:0b[01_]+|0x[\da-f_]+(?:\.[\da-f_p\-]+)?|[\d_]+(?:\.[\d_]+)?(?:e[+-]?[\d]+)?)[glidf]?\b/i,
	'operator': {
		pattern: /(^|[^.])(~|==?~?|\?[.:]?|\*(?:[.=]|\*=?)?|\.[@&]|\.\.<|\.{1,2}(?!\.)|-[-=>]?|\+[+=]?|!=?|<(?:<=?|=>?)?|>(?:>>?=?|=)?|&[&=]?|\|[|=]?|\/=?|\^=?|%=?)/,
		lookbehind: true
	},
	'punctuation': /\.+|[{}[\];(),:$]/
});

Prism.languages.insertBefore('groovy', 'string', {
	'shebang': {
		pattern: /#!.+/,
		alias: 'comment'
	}
});

Prism.languages.insertBefore('groovy', 'punctuation', {
	'spock-block': /\b(setup|given|when|then|and|cleanup|expect|where):/
});

Prism.languages.insertBefore('groovy', 'function', {
	'annotation': {
		alias: 'punctuation',
		pattern: /(^|[^.])@\w+/,
		lookbehind: true
	}
});

// Handle string interpolation
Prism.hooks.add('wrap', function(env) {
	if (env.language === 'groovy' && env.type === 'string') {
		var delimiter = env.content[0];

		if (delimiter != "'") {
			var pattern = /([^\\])(\$(\{.*?\}|[\w\.]+))/;
			if (delimiter === '$') {
				pattern = /([^\$])(\$(\{.*?\}|[\w\.]+))/;
			}

			// To prevent double HTML-encoding we have to decode env.content first
			env.content = env.content.replace(/</g, '<').replace(/&/g, '&');

			env.content = Prism.highlight(env.content, {
				'expression': {
					pattern: pattern,
					lookbehind: true,
					inside: Prism.languages.groovy
				}
			});

			env.classes.push(delimiter === '/' ? 'regex' : 'gstring');
		}
	}
});