$0 behaves differently depending on its content

[ofseed]

All snippets are provided in the vscode format

The following snippet makes the last node of the snippet where the $0 is.

${1:var} = $0;

The following do the same, after jumping to $0, luasnip.jump(1) will no longer take effect, nvim will keep select mode no matter how luasnip.jump(1) is called.

${1:var} = ${0:nil};

The problem occurs in the following snippet. Ideally, it should behave all the same as the last one, i.e. after jumping to $0, luasnip.jump(1) should not take effect, but the actual situation is different, the calling luasnip.jump(1) again will move the cursor to the position before semicolon and enter insert mode.

${1:var} = ${0:$TM_FILENAME_BASE};

I've tested the same cases in vscode, luasnip behaves differently with vscode.

[L3MON4D3]

Hey :)

IIRC I implemented this because there were some issues with the $0-node in luasnip, in that it couldn't actually contain text.
Since then there have been quite a few changes, and I'll reevaluate whether this still makes sense :)
(But it'll take some time, I don't think this is pressing)