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Normative: Generically forbid 402 method extensions in Forbidden Extensions #1920

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Apr 29, 2020
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Normative: Generically forbid 402 method extensions in Forbidden Extensions #1920

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2 changes: 1 addition & 1 deletion spec.html
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Expand Up @@ -24737,7 +24737,7 @@ <h1>Forbidden Extensions</h1>
Neither mapped nor unmapped arguments objects may be created with an own property named *"caller"*.
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The behaviour of the following methods must not be extended except as specified in ECMA-402: `Object.prototype.toLocaleString`, `Array.prototype.toLocaleString`, `Number.prototype.toLocaleString`, `Date.prototype.toLocaleDateString`, `Date.prototype.toLocaleString`, `Date.prototype.toLocaleTimeString`, `String.prototype.localeCompare`, %TypedArray%`.prototype.toLocaleString`.
The behaviour of built-in methods which are specified in ECMA-402, such as those named `toLocaleString`, must not be extended except as specified in ECMA-402.
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The RegExp pattern grammars in <emu-xref href="#sec-patterns"></emu-xref> and <emu-xref href="#sec-regular-expressions-patterns"></emu-xref> must not be extended to recognize any of the source characters A-Z or a-z as |IdentityEscape[+U]| when the <sub>[U]</sub> grammar parameter is present.
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