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local ls = require('luasnip')
local ts_utils = require('nvim-treesitter.ts_utils')
local ts_locals = require('nvim-treesitter.locals')
local c = ls.choice_node
local d = ls.dynamic_node
local f = ls.function_node
local i = ls.insert_node
local s = ls.s
local sn = ls.snippet_node
local t = ls.text_node
local fmt = require('luasnip.extras.fmt').fmt
local function same(index)
return f(function(args)
return args[1]
end, { index })
end
ls.add_snippets('lua', {
s('req', fmt([[local {} = require('{}')]], {
f(function(name)
local xs = vim.split(name[1][1], '.', { plain = true })
return xs[#xs] or ''
end, { 1 }),
i(1),
})),
})
local function is_ptr(str)
return string.find(str, '*', 1, true) ~= nil
end
local function is_num(str)
return vim.regex(
'\\v^('
.. 'u?int(8|16|32|64)?'
.. '|byte'
.. '|complex(64|128)'
.. '|float(32|64)'
.. '|rune'
.. '|uintptr'
.. ')$'
):match_str(str) ~= nil
end
local transforms = {
bool = 'false',
string = '""',
error = 'err',
[is_num] = '0',
[is_ptr] = 'nil',
}
local transform = function(text)
local condition_matches = function(condition, ...)
if type(condition) == 'string' then
return condition == text
else
return condition(...)
end
end
for condition, result in pairs(transforms) do
if condition_matches(condition, text) then
return t(result)
end
end
return t(text .. '{}')
end
local handlers = {
parameter_list = function(node)
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(
vim.treesitter.get_node_text(type_node, 0)
))
if idx ~= count - 1 then
table.insert(result, t({ ', ' }))
end
end
return result
end,
type_identifier = function(node)
local text = vim.treesitter.get_node_text(node, 0)
return { transform(text) }
end,
}
local function_node_types = {
function_declaration = true,
method_declaration = true,
func_literal = true,
}
local function go_result_type()
local cursor_node = ts_utils.get_node_at_cursor()
if cursor_node == nil then
print('Unable to find position')
return t('')
end
local scope = ts_locals.get_scope_tree(cursor_node, 0)
local function_node
for _, v in ipairs(scope) do
if function_node_types[v:type()] then
function_node = v
break
end
end
if not function_node then
print('Not inside of a function')
return t('')
end
local query = vim.treesitter.query.parse('go', [[
[
(method_declaration result: (_) @id)
(function_declaration result: (_) @id)
(func_literal result: (_) @id)
]
]])
for _, node in query:iter_captures(function_node, 0) do
if handlers[node:type()] then
return handlers[node:type()](node)
end
end
end
ls.add_snippets('go', {
s(
'ife',
fmt(
[[
if err != nil {
return <>
}
]],
{
d(1, function()
return sn(nil, go_result_type())
end),
},
{
delimiters = '<>',
}
)
),
})
ls.add_snippets('c', {
s(
'gu',
fmt(
[[
#ifndef {}_H
#define {}_H
{}
#endif /* !{}_H */
]],
{ i(1), same(1), i(0), same(1), }
)
),
})
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