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POTypeScript and RegExp
 

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    <p>TypeScript says: </p> <blockquote> <p>The property '<code>$1</code>' does not exist on value of type '<code>{ (pattern: string, flags?: string): RegExp; new(pattern: string, flags?: string): RegExp; }</code>'</p> </blockquote> <p>The type is explainable by looking at the definition from <code>lib.d.ts</code> that came with <em>TypeScript 0.8.2</em>: </p> <pre><code>interface RegExp { /** * Executes a search on a string using a regular expression pattern, and returns an array containing the results of that search. * @param string The String object or string literal on which to perform the search. */ exec(string: string): RegExpExecArray; /** * Returns a Boolean value that indicates whether or not a pattern exists in a searched string. * @param string String on which to perform the search. */ test(string: string): bool; /** Returns a copy of the text of the regular expression pattern. Read-only. The rgExp argument is a Regular expression object. It can be a variable name or a literal. */ source: string; /** Returns a Boolean value indicating the state of the global flag (g) used with a regular expression. Default is false. Read-only. */ global: bool; /** Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression. Default is false. Read-only. */ ignoreCase: bool; /** Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression. Default is false. Read-only. */ multiline: bool; lastIndex: number; } declare var RegExp: { new (pattern: string, flags?: string): RegExp; (pattern: string, flags?: string): RegExp; } </code></pre> <p>My question is how can I change/update this to allow me to reference <code>RegExp.$1</code>, <code>RegExp.$2</code>, etc.? Preferably something I can declare separately since I do not intend to directly edit <code>lib.d.ts</code> (which will most likely get replaced as it is updated)</p> <p>I tried this to no avail: </p> <pre><code>declare var RegExp: { new (pattern: string, flags?: string): RegExp; (pattern: string, flags?: string): RegExp; $1: any; $2: any; $3: any; $4: any; $5: any; $6: any; $7: any; $8: any; $9: any; } </code></pre> <p>I guess they should be declared with type <code>string</code> actually. But in any case it doesn't remove the errors. </p> <p>In addition to this I'm also curious about what this means exactly (why is it declared with and without a <code>new</code>?): </p> <pre><code>new (pattern: string, flags?: string): RegExp; (pattern: string, flags?: string): RegExp; </code></pre>
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