improve commented placeholder ${number:#text}

[stardiviner]

Sometimes I hope to add some description text into placeholder for placeholder default text. (Those description text should be auto removed, so use commented placeholder). But commented placeholder does not allow other formats.

The improved commented placeholder should can allow other placeholder format behind commented placeholder.
Here is an prototype: (The | is the cursor)

snippet if
    if ${1:#:condition:default text}
        ${2}
    endif

after expand the if snippet, it should looks like this:

if `<1:|#:condition:default text>`
    `<2>`
endif

If do not do anything, just jump to next placeholder, then the commented placeholder auto removed.

if default text
    |
endif

And I type something in placeholder 1. Then it becomes like this:

if typed text
    `<2>`
endif

Just like targeted placeholder ${1:TARGET:default text}.

What do you think ?

[Shougo]

OK. I will put it on todo list.