Code fixes for syntax errors

[ghost]

TypeScript Version: 3.0.0-dev.20180623

Code

const o = { a: 1; b: 2 };

Expected behavior:

Get a quick fix to replace ; with ,.

Actual behavior:

No fix. Similar for { a: 1 b: 2 }.

[mhegazy]

The problem with these is that we will have to add parsing support for these patterns to be able to fix them. so there is a limited set of patterns that we can support.

That said, we should be able to support he missing , errors listed above.

[akoserwal]

@mhegazy: I would like to work on this issue. Please, can you help me with some starting pointers?

[MEXdave1997]

@akoserwal are you still working on this? I wouldn't mind helping out in finding this out.

EDIT: Also, I would suspect that you can find something in the parser file in src/compiler/parser.ts

[ghost]

Code fixes go in the codefixes folder -- don't think changes to the parser will be needed for this as long as the diagnostic it produces is usable for a code fix.
See fixForgottenThisPropertyAccess.ts for a simple example.

[adeniszczyc]

Going to take a look at continuing the work of @akoserwal on this issue now