.DollarNames auto completion inside brackets

[karoliskoncevicius]

R provides auto-completion for list names:

iris$Sp<tab>
iris$Species

But this does not work within square brackets:

iris[iris$Sp<tab>]
iris[iris$Sp]

Even thou regular auto-completion works fine:

iris[ir<tab>]
iris[iris]

Also auto-completion works when the argument is wrapped inside round brackets:

iris[(iris$Sp<tab>)]
iris[(iris$Species)]

Wish: make .DollarNames auto-completion work within square brackets.