feat(ui): display installed server version (#520)

1 files changed, 49 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/core/result.lua b/lua/nvim-lsp-installer/core/result.lua
new file mode 100644
index 00000000..33623c66
--- /dev/null
+++ b/lua/nvim-lsp-installer/core/result.lua
@@ -0,0 +1,49 @@
+---@class Failure
+---@field error any
+local Failure = {}
+Failure.__index = Failure
+
+function Failure.new(error)
+    return setmetatable({ error = error }, Failure)
+end
+
+---@class Result
+---@field value any
+local Result = {}
+Result.__index = Result
+
+function Result.new(value)
+    return setmetatable({
+        value = value,
+    }, Result)
+end
+
+function Result.success(value)
+    return Result.new(value)
+end
+
+function Result.failure(error)
+    return Result.new(Failure.new(error))
+end
+
+function Result:get_or_nil()
+    if self:is_success() then
+        return self.value
+    end
+end
+
+function Result:err_or_nil()
+    if self:is_failure() then
+        return self.value.error
+    end
+end
+
+function Result:is_failure()
+    return getmetatable(self.value) == Failure
+end
+
+function Result:is_success()
+    return getmetatable(self.value) ~= Failure
+end
+
+return Result