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// Greatly (!) simplified patterns for the PropertyName production.
var propertyName = [
// PropertyName :: LiteralPropertyName :: IdentifierName
"\\w+",
// PropertyName :: LiteralPropertyName :: StringLiteral
"(?:'[^']*')",
"(?:\"[^\"]*\")",
// PropertyName :: LiteralPropertyName :: NumericLiteral
"\\d+",
// PropertyName :: ComputedPropertyName
"(?:\\[[^\\]]+\\])",
].join("|")
var nativeCode = RegExp([
"^", "function", ("(?:" + propertyName + ")?"), "\\(", "\\)", "\\{", "\\[native code\\]", "\\}", "$"
].join("\\s*"));
// Bound functions are considered built-ins.
reportMatch(nativeCode, function(){}.bind().toString());
reportMatch(nativeCode, function fn(){}.bind().toString());
// Built-ins which are well-known intrinsic objects.
reportMatch(nativeCode, Array.toString());
reportMatch(nativeCode, Object.prototype.toString.toString());
reportMatch(nativeCode, decodeURI.toString());
// Other built-in functions.
reportMatch(nativeCode, Math.asin.toString());
reportMatch(nativeCode, String.prototype.blink.toString());
reportMatch(nativeCode, RegExp.prototype[Symbol.split].toString());
// Built-in getter functions.
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(RegExp.prototype, "flags").get.toString());
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(Object.prototype, "__proto__").get.toString());
// Built-in setter functions.
reportMatch(nativeCode, Object.getOwnPropertyDescriptor(Object.prototype, "__proto__").set.toString());
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