Empty tuples are allowed in type assertions

TypeScript Version:

master

Code

var a: [] = <[]>[];

Expected behavior:

$ node built/local/tsc.js index.ts
index.ts(1,8): error TS1122: A tuple type element list cannot be empty.
index.ts(1,14): error TS1122: A tuple type element list cannot be empty.

Actual behavior:

$ node built/local/tsc.js index.ts
index.ts(1,8): error TS1122: A tuple type element list cannot be empty.

Huh! I wonder if people used that as a hack. Thanks for reporting!

As a note, this also works with as-style assertions. Any tests should check for both.

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Empty tuples are allowed in type assertions #9103

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Empty tuples are allowed in type assertions #9103

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DanielRosenwasser commented on Jun 12, 2016

DanielRosenwasser commented on Jun 12, 2016

falsandtru commented on Jun 12, 2016

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