chore(functional): restructure and extend functional modules (#703)

1 files changed, 30 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/core/functional/data.lua b/lua/nvim-lsp-installer/core/functional/data.lua
new file mode 100644
index 00000000..da6f1efd
--- /dev/null
+++ b/lua/nvim-lsp-installer/core/functional/data.lua
@@ -0,0 +1,30 @@
+local _ = {}
+
+_.table_pack = function(...)
+    return { n = select("#", ...), ... }
+end
+
+---@generic T : string
+---@param values T[]
+---@return table<T, T>
+_.enum = function(values)
+    local result = {}
+    for i = 1, #values do
+        local v = values[i]
+        result[v] = v
+    end
+    return result
+end
+
+---@generic T
+---@param list T[]
+---@return table<T, boolean>
+_.set_of = function(list)
+    local set = {}
+    for i = 1, #list do
+        set[list[i]] = true
+    end
+    return set
+end
+
+return _