Support inlay hints in solidity

[kanej]

VSCode has added an api for enhancing source code with inlays. Typescript uses it to display inferred types for variables, among other things:

Are there any places in solidity development we can leverage this feature?

[sambacha]

the language status item is the preferred way to present language status reports for the active text editors, such as selected linter or notifying about a configuration problem.

There are two options:
1: inlay hints that are hh specific
2: inlay hints that are solidity specific

for the 2nd option you can see this extension: https://github.com/ConsenSys/vscode-solidity-auditor

Additional resources:

microsoft/vscode@a330b89/src/vscode-dts/vscode.d.ts#L11839

commit: microsoft/vscode@17ed7bf
ref: microsoft/vscode#129037
more info: code.visualstudio.com/updates/v1_65

[alcuadrado]

Another thing that we can do with inline hints, copied from inspired by intellij: when a function parameter is a literal (not a variable, not a complex expression) we can show the argument name.

[alcuadrado]

This is an example of what I mentioned