TypeScript this Type Information Dosen't Surface Properly in Editor
Environment Information
- VS Code Version: 1.6.0-insiders (f31a4)
- OS Version: Windows 10 1607 (Build 14393.105)
- TypeScript Version: 2.0.2 (Release Candidate)
Problem
In TypeScript 2.0, the shape of this for functions can be described using type annotations. However, the VS Code TypeScript editor does not properly surface this information. The this variable in the function gets typed as any within the function but the editor still enforces that use of this in the function conform to the type information used to describe this for the function. This results in the odd issue of the editor not providing any intellisense for the this due to it being typed as any but still expects it conform to the shape of this described by the this type annotation for the function.
Reproduction
The following minimum TypeScript file will reproduce the issue in VS Code.
index.ts
typectxA={funB: (paramA: string)=>void}interfaceTestObj{propA: {funA: (this: ctxA)=>void}}letobjA: TestObj={propA: {funA: function(){// errors since funB dosen't match the signature (missing paramA) of funB in ctxA even though the editor types it as anythis.funB();}}}Expected Result
The VS Code TypeScript editor should properly surface the type information for this in functions and not just type it as any to provide proper intellisense.
TypeScript
thisType Information Dosen't Surface Properly in EditorEnvironment Information
Problem
In TypeScript 2.0, the shape of
thisfor functions can be described using type annotations. However, the VS Code TypeScript editor does not properly surface this information. Thethisvariable in the function gets typed asanywithin the function but the editor still enforces that use ofthisin the function conform to the type information used to describethisfor the function. This results in the odd issue of the editor not providing any intellisense for thethisdue to it being typed asanybut still expects it conform to the shape ofthisdescribed by thethistype annotation for the function.Reproduction
The following minimum TypeScript file will reproduce the issue in VS Code.
Expected Result
The VS Code TypeScript editor should properly surface the type information for
thisin functions and not just type it asanyto provide proper intellisense.