feat: add provider interface (#601)

1 files changed, 6 insertions, 2 deletions

diff --git a/lua/mason-core/optional.lua b/lua/mason-core/optional.lua
index 6eb0719e..cc40da77 100644
--- a/lua/mason-core/optional.lua
+++ b/lua/mason-core/optional.lua
@@ -105,13 +105,17 @@ function Optional:is_present()
     return self._value ~= nil
 end
 
----@param err fun(): any
+---@param err (fun(): any)|string
 function Optional:ok_or(err)
     local Result = require "mason-core.result"
     if self:is_present() then
         return Result.success(self:get())
     else
-        return Result.failure(err())
+        if type(err) == "string" then
+            return Result.failure(err)
+        else
+            return Result.failure(err())
+        end
     end
 end