NixOS/home/config/nvim/lua/snippets/go/efi.lua

179 lines
4.2 KiB
Lua

local ls = require "luasnip"
local sn = ls.sn
local s = ls.s
local i = ls.insert_node
local t = ls.text_node
local d = ls.dynamic_node
local c = ls.choice_node
local fmta = require("luasnip.extras.fmt").fmta
local rep = require("luasnip.extras").rep
local get_node_text = vim.treesitter.get_node_text
local default_values = {
int = "0",
int8 = "0",
int16 = "0",
int32 = "0",
int64 = "0",
uint = "0",
uint8 = "0",
uint16 = "0",
uint32 = "0",
uint64 = "0",
["time.Time"] = "time.Time{}",
["time.Duration"] = "time.Duration(0)",
bool = "false",
string = [[""]],
float32 = "0",
float64 = "0",
error = function(_, info)
if info then
info.index = info.index + 1
return c(info.index, {
t(info.err_name),
t(string.format('errors.Wrap(%s, "%s")', info.err_name, info.func_name)),
})
else
return t "err"
end
end,
-- Types with a "*" mean they are pointers, so return nil
[function(text)
return string.find(text, "*", 1, true) ~= nil
end] = function(_, _)
return t "nil"
end,
[function(text)
return not string.find(text, "*", 1, true) and string.upper(string.sub(text, 1, 1)) == string.sub(text, 1, 1)
end] = function(text, info)
info.index = info.index + 1
return sn(info.index, {
c(1, {
t(text .. "{}"),
i(2, text),
}),
})
end,
}
local transform = function(text, info)
local condition_matches = function(condition, ...)
if type(condition) == "string" then
return condition == text
else
return condition(...)
end
end
for condition, result in pairs(default_values) do
if condition_matches(condition, text, info) then
if type(result) == "string" then
return t(result)
end
return result(text, info)
end
end
info.index = info.index + 1
return sn(info.index, {
c(1, {
t(text .. "{}"),
i(2, text),
}),
})
end
local handlers = {
parameter_list = function(node, info)
local result = {}
local count = node:named_child_count()
for idx = 0, count - 1 do
local matching_node = node:named_child(idx)
local type_node = matching_node:field("type")[1]
table.insert(result, transform(get_node_text(type_node, 0), info))
if idx ~= count - 1 then
table.insert(result, t { ", " })
end
end
return result
end,
type_identifier = function(node, info)
local text = get_node_text(node, 0)
return { transform(text, info) }
end,
}
local function_node_types = {
function_declaration = true,
method_declaration = true,
func_literal = true,
}
local function go_result_type(info)
local node = vim.treesitter.get_node()
while node ~= nil do
if function_node_types[node:type()] then
break
end
node = node:parent()
end
if not node then
vim.notify("Not inside a function", vim.log.levels.ERROR, { title = "Snippet" })
return t ""
end
local query = assert(vim.treesitter.query.get("go", "return-snippet"), "No Query")
for _, capture in query:iter_captures(node, 0) do
if handlers[capture:type()] then
return handlers[capture:type()](capture, info)
end
end
info.index = info.index + 1
return { i(info.index, "nil") }
end
local go_return_values = function(args)
return sn(
nil,
go_result_type {
index = 0,
err_name = args[1][1],
func_name = args[2][1],
}
)
end
ls.add_snippets("go", {
s(
"efi",
fmta(
[[
<val>, <err> := <f>(<args>)
if <err_same> != nil {
return <result>
}
<finish>
]],
{
val = i(1),
err = i(2, "err"),
f = i(3),
args = i(4),
err_same = rep(2),
result = d(5, go_return_values, { 2, 3 }),
finish = i(0),
}
)
),
})