fix(generator): utils.is_empty

src/awesomewm.d.tl/generator/snippets.tl

@@ -69,8 +69,14 @@ function snippets.render_records_from_Parameters(items: List<Function_Info.Param
             return snippets.render_record(t.name, properties)
          end
          return ""
-      end):filter(function(p: string): boolean return #p > 0 end):concat("\n")
+      end):filter(
-   end):filter(function(p: string): boolean return #p > 0 end):concat("\n")
+         function (s: string): boolean
+            return not utils.is_empty(s)
+         end):concat("\n")
+   end):filter(
+      function (s: string): boolean
+         return not utils.is_empty(s)
+      end):concat("\n")
 end
 
 function snippets.render_record_functions(items: List<Function_Info.Function_Info>): string

src/awesomewm.d.tl/utils.tl

@@ -43,6 +43,10 @@ function utils.capitalize(s: string): string
    return (s:gsub("^%l", string.upper))
 end
 
+function utils.is_empty(s: string): boolean
+   return s == nil or s == ""
+end
+
 -- At some point, we should probably write a wrapper to make penlight's function work with pcalls.
 function utils.do_or_fail<T>(func: function<T>(...: any): (T | nil, string), ...: any): T
    local logger = require "logger"