vscode Nest snippet choices and add tab stops to choices - visual-studio-code

Question

I want to do something like that in my snippets for visual studio code:
"V.G.${1|BLOCK_NR,MASS_MM,MASS_360,I,J,K,R,FEEDRATE,FEEDRATE_SCALE,MERR[${2}]|}"
So after choose the option MERR[] I will see the cursor inside the brackets.
and how i have to manage sub choices like:
"V.G.${1|choice${2|subchoiceA,subchoiceB|},choice, choice......}"
If I choose MERR[] Option I will jump into [Cursor should be here]. How can i handle this?

Answer 1

Here is a workaround to your subchoiceA/B question because you cannot have anything except plain text as choices - no tabstops or subchoices, etc. Your example:
V.G.${1|choice${2|subchoiceA,subchoiceB|},choice, choice......}"
This can be achieved however with 2 snippets:
"choices with subchoices": {
"prefix": "_choices", // whatever prefix you want
"body": [
"V.G.${1|choice1, _subchoices,choice2,choice3|}"
],
"description": "variables in a choice element"
},
"my subchoice list": {
"prefix": "_subchoices", // this prefix must be what you used in the main snippet
// as your subchoice option
"body": [ "${1|subchoiceA,subchoiceB|}" ],
"description": "subChoices"
},
What happens is that when you choose the subchoices option in the main snippet it will see it as the prefix for the second snippet - that is pretty neat. But it will not do so until you trigger that recognition with Ctrl+Space the usual intellisense trigger and then tab to select the second snippet.
It is only one or two extra keystrokes to get subchoices working inside of a parent choice element when otherwise it can't be done at all.
The only issue is that your second prefix - here subchoices cannot be a continuation of another string with no spaces otherwise it won't be recognized as a standalone snippet prefix by vscode. That is why I added the space before subchoices in the main snippet since your example has "V.G.${1....} with no space before the option would be inserted.
Here is a demo: