check doc.field

#1990

script/core/diagnostics/inject-field.lua

@@ -50,6 +50,9 @@ return function (uri, callback)
             if def.type == 'doc.type.field' then
                 return
             end
+            if def.type == 'doc.field' then
+                return
+            end
         end
 
         local howToFix = lang.script('DIAG_INJECT_FIELD_FIX_CLASS', {

test/diagnostics/inject-field.lua

@@ -39,3 +39,26 @@ local m
 m.xx = 1 -- OK
 m.yy = 1 -- OK
 ]]
+
+TEST [[
+---@class Class
+---@field x number
+
+---@type Class
+local t
+
+t.x = 1 -- OK
+t.<!y!> = 2 -- Warning
+]]
+
+TEST [[
+---@class Class
+---@field x number
+---@field [any] any
+
+---@type Class
+local t
+
+t.x = 1 -- OK
+t.y = 2 -- OK
+]]