1 files changed, 83 insertions, 0 deletions
diff --git a/node_modules/call-signature/index.js b/node_modules/call-signature/index.js
new file mode 100644
index 000000000..327cb56ed
--- /dev/null
+++ b/node_modules/call-signature/index.js
@@ -0,0 +1,83 @@
+'use strict';
+module.exports.parse = parse;
+module.exports.generate = generate;
+
+// TODO(jamestalmage): Allow full range of identifier characters instead of just ASCII
+//
+// This will likely require a build step
+//
+// SPEC: http://www.ecma-international.org/ecma-262/5.1/#sec-7.6
+//
+// TOOLING:
+//    https://github.com/mathiasbynens/regenerate
+//    https://www.npmjs.com/package/regjsgen
+
+var regex = /^\s*(?:([A-Za-z$_][A-Za-z0-9$_]*)\s*\.)?\s*([A-Za-z$_][A-Za-z0-9$_]*)\s*\(\s*((?:[A-Za-z$_][A-Za-z0-9$_]*)|(?:\[\s*[A-Za-z$_][A-Za-z0-9$_]*\s*]))?((?:\s*,\s*(?:(?:[A-Za-z$_][A-Za-z0-9$_]*)|(?:\[\s*[A-Za-z$_][A-Za-z0-9$_]*\s*])))+)?\s*\)\s*$/;
+
+function parse(str) {
+	var match = regex.exec(str);
+	if (!match) {
+		return null;
+	}
+
+	var callee;
+	if (match[1]) {
+		callee = {
+			type: 'MemberExpression',
+			object: match[1],
+			member: match[2]
+		};
+	} else {
+		callee = {
+			type: 'Identifier',
+			name: match[2]
+		};
+	}
+
+	var args = match[4] || '';
+	args = args.split(',');
+	if (match[3]) {
+		args[0] = match[3];
+	}
+	var trimmed = [];
+	args.forEach(function (str) {
+		var optional = false;
+		str = str.replace(/\s+/g, '');
+		if (!str.length) {
+			return;
+		}
+		if (str.charAt(0) === '[' && str.charAt(str.length - 1) === ']') {
+			optional = true;
+			str = str.substring(1, str.length - 1);
+		}
+		trimmed.push({
+			name: str,
+			optional: optional
+		});
+	});
+
+	return {
+		callee: callee,
+		args: trimmed
+	};
+}
+
+function generate(parsed) {
+	var callee;
+	if (parsed.callee.type === 'MemberExpression') {
+		callee = [
+			parsed.callee.object,
+			'.',
+			parsed.callee.member
+		];
+	} else {
+		callee = [parsed.callee.name];
+	}
+	return callee.concat([
+		'(',
+		parsed.args.map(function (arg) {
+			return arg.optional ? '[' + arg.name + ']' : arg.name;
+		}).join(', '),
+		')'
+	]).join('');
+}