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Title: type `nothing` emitted in generated .d.ts files · Issue #8345 · microsoft/TypeScript · GitHub

Open Graph Title: type `nothing` emitted in generated .d.ts files · Issue #8345 · microsoft/TypeScript

X Title: type `nothing` emitted in generated .d.ts files · Issue #8345 · microsoft/TypeScript

Description: function f() { var x: string | undefined = undefined; y = 0; if (x) { var y: typeof x; } return y; // y has type nothing } generates invalid .d.ts file declare function f(): nothing; this is a regression introduced by #8340

Open Graph Description: function f() { var x: string | undefined = undefined; y = 0; if (x) { var y: typeof x; } return y; // y has type nothing } generates invalid .d.ts file declare function f(): nothing; this is a regr...

X Description: function f() { var x: string | undefined = undefined; y = 0; if (x) { var y: typeof x; } return y; // y has type nothing } generates invalid .d.ts file declare function f(): nothing; this is a regr...

Opengraph URL: https://github.com/microsoft/TypeScript/issues/8345

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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"type `nothing` emitted in generated .d.ts files","articleBody":"``` ts\nfunction f() {\n    var x: string | undefined = undefined;\n    y = 0;\n    if (x) {\n       var y: typeof x;\n    }\n    return y; // y has type nothing\n}\n```\n\ngenerates invalid .d.ts file\n\n``` ts\ndeclare function f(): nothing;\n```\n\nthis is a regression introduced by https://github.com/Microsoft/TypeScript/pull/8340\n","author":{"url":"https://github.com/mhegazy","@type":"Person","name":"mhegazy"},"datePublished":"2016-04-28T00:25:54Z","url":"https://github.com/microsoft/TypeScript/issues/8345"}

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