fix #876

Author: sumneko

changelog.md

@@ -12,6 +12,7 @@
 * `CHG` completion: can be triggered in `LuaDoc` and strings
 * `CHG` diagnostic: smoother
 * `CHG` settings `Lua.color.mode` removed
+* `FIX` [#876](https://github.com/sumneko/lua-language-server/issues/876)
 * `FIX` [#879](https://github.com/sumneko/lua-language-server/issues/879)
 * `FIX` [#884](https://github.com/sumneko/lua-language-server/issues/884)
 * `FIX` [#885](https://github.com/sumneko/lua-language-server/issues/885)

script/core/hover/table.lua

@@ -122,12 +122,24 @@ local function getOptionalMap(fields)
         if field.type == 'doc.field.name' then
             if field.parent.optional then
                 local key = vm.getKeyName(field)
+                local tp  = vm.getKeyType(field)
+                if tp == 'number' or tp == 'integer' then
+                    key = tonumber(key)
+                elseif tp == 'boolean' then
+                    key = key == 'true'
+                end
                 optionals[key] = true
             end
         end
         if field.type == 'doc.type.field' then
             if field.optional then
                 local key = vm.getKeyName(field)
+                local tp  = vm.getKeyType(field)
+                if tp == 'number' or tp == 'integer' then
+                    key = tonumber(key)
+                elseif tp == 'boolean' then
+                    key = key == 'true'
+                end
                 optionals[key] = true
             end
         end

test/hover/init.lua

@@ -1644,6 +1644,7 @@ TEST [[
 ---@field x  number
 ---@field y  number
 ---@field z? number
+---@field [3]? number
 local <?t?>
 
 t.z = any
@@ -1653,6 +1654,7 @@ local t: Position {
     x: number,
     y: number,
     z?: number,
+    [3]?: number,
 }
 ]]