1 files changed, 22 insertions, 0 deletions
diff --git a/.config/nvim/lua/utils/delegate.lua b/.config/nvim/lua/utils/delegate.lua
new file mode 100644
index 0000000..3ea6d75
--- /dev/null
+++ b/.config/nvim/lua/utils/delegate.lua
@@ -0,0 +1,22 @@
+local M = {}
+
+--- Capture `fn`'s upvalues and pass to `delegate`
+---@param delegate fun(env: table<string, any>, _: ...): ...
+---@param fn function
+---@return fun(...): ...
+function M.new(delegate, fn)
+    local upvalues = {}
+    for i = 1, debug.getinfo(fn, "u").nups do
+        local name, value = debug.getupvalue(fn, i)
+        upvalues[name] = value
+    end
+    return function(...)
+        return delegate(upvalues, ...)
+    end
+end
+
+return setmetatable(M, {
+    __call = function(_, ...)
+        return M.new(...)
+    end,
+})