Support placeholder expansion inside of eval

[thalesmello]

Problem Statement

Some configs snippet expansions I want to do would require expanding the placeholder inside of the eval expression. Would be possible to support that as a feature?

An example of what I'm trying to accomplish, basically to break the line automatically if I hit enter in the $2 placeholder.

snippet f "Anonymous function" i
    function (${1})${2: }$3 `!lua "$2" == "\n" and "\n" or ""`end${0}

Ideas or possible solutions

I think it could maybe be solved by expanding $2 inside the string of the enclosed eval expression, but that would require re-evaluating the eval expression each time the placeholders are updated.

Alternatives you have considered

Alternatively, this could be exposed as a function call:

snippet f "Anonymous function" i
    function (${1})${2: }$3 `!lua require("snippy").expand("$2") == "\n" and "\n" or ""`end${0}

[dcampos]

Looks like an interesting feature to add. Because Snippy uses luaeval() to handle Lua code, we could rely on the "magic" bult-in global _A, that works like this:

luaeval('_A[1] + _A[2]', [40, 2])

So we could have:

snippet f "Anonymous function" i
    function (${1})${2: }$3 `!lua _A[2] == "\n" and "\n" or ""`end${0}

Or something like that.