Golang VS Code Snippet: Mimic "built-in" `variable.print!` snippet

Question

Context: The Golang VS Code extension has built-in snippets/macros for creating a fmt.PrintX statement from a given variable:

.print! before .print! after

Note how the variable name is filled in for me.

I frequently write methods, and the Golang extension's meth snippet, in my opinion, is slow, since there are 5 (!) tab stops:

meth tabstops

So far, I've written a snippet that mimics the meth snippet:

"Struct Method": {
 "prefix": ".meth",
 "body": [
 "func (1ドル 2ドル) 3ドル(4ドル) 5ドル {",
 "\t6ドル",
 "}"
 ],
 "description": "some description"
}

And I would like this snippet to mimic the print! macro/snippet, where it fills in the variable name; for the method snippet, instead of filling a variable, it would automatically fill in the method receiver (1ドル and 2ドル) with the first letter of the struct name, and the full struct name in the second.

So, if I have the following struct:

type SomeStruct struct {}

and type:

SomeStruct.meth

then activate the snippet, it should output:

func (s SomeStruct) .(.) . {
 .
}

where each . is a tab stop.

Is this sort of snippet possible? If so, how can I write it so it does this?

• rioV8: use the extension Hypersnips, with a regex prefix you can capture the struct name

Answer 1

One thing you can do is to make a snippet in a keybinding that can parse the current line. Put this into your keybindings.json:

{
 "key": "alt+w",
 "command": "editor.action.insertSnippet",
 "args": {
 "snippet": "\n\nfunc (${TM_CURRENT_LINE/\\s*type\\s*(.)(.*)\\s* struct\\s*{}/${1:/downcase} 1ドル2ドル)/} 1ドル(2ドル) 3ドル {\n\t4ドル\n}"
 },
 // "when": "langId == golang"
}

The workflow is different than what you mentioned but is also easier - you don't have to type SomeStruct.meth. Just trigger the keybinding at the end of the type SomeStruct struct {} line as in the demo.

If you want to be anywhere in the document and trigger a snippet completion, then the HyperSnips extension may be the way to go.

golang struct snippet