"Expand Selection" doesn't expand to strings or scopes

I use VScode's "Expand Selection" command a lot to copy strings around, but when I try to use it on Lua strings, it expands the selection a lot more than just the string I'm on.

Actual behavior

Suppose my cursor is inside the word example:

hs.alert(prefix .. " an exam|ple string " .. suffix)

1st call to Expand Selection selects the word:

hs.alert(prefix .. " an example string " .. suffix)

2nd call to Expand Selection selects everything between () instead of the full string:

hs.alert(prefix .. " an example string " .. suffix)

Expected behavior

2nd call to Expand Selection should select just the string:

hs.alert(prefix .. " an example string " .. suffix)

In JavaScript, I noticed it even has two steps for the string, the inner part of the string, then the outer:

alert(prefix + " an example string " + suffix)

alert(prefix + "an example string" + suffix)

alert(prefix + " an example string " + suffix)

That would also work!

Similar scenarios

Scopes are also currently skipped:

local myFunction = function () ret|urn true end

local myFunction = function () return true end <- 1st call selects the word

local myFunction = function () return true end <- expected: 2nd call selects the function scope

local myFunction = function () return true end <- actual: 2nd call selects the line instead

Same for Object.property:

Object.property = true

Object.property = true <- expected

Object.property = true <- actual

まず Expand Selection の実装と、選択範張をカバーしているテストをすべて見つけてください。この issue では特定のファイルやエントリーポイントは指定されていません。Lua の文字列、関数スコープ、Object.property の例を再現し、その後、連続する展開によって期待される構文要素が選択されることを示すカバレッジを追加してください。