Merge pull request #5297 from myk002/myk_boolean

[argparse] improve error message when boolean arg is missing
DFHack · Feb 22, 2025 · 0c6da54 · 0c6da54
2 parents 9e7d2d9 + c025282
commit 0c6da54
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/library/lua/argparse.lua b/library/lua/argparse.lua
@@ -244,6 +244,9 @@ local toBool={["true"]=true,["yes"]=true,["y"]=true,["on"]=true,["1"]=true,["ena
 ---@param arg_name? string
 ---@return boolean
 function boolean(arg, arg_name)
+    if arg == nil then
+        arg_error(arg_name, 'missing value; expected "true", "yes", "false", or "no"')
+    end
     local arg_lower = string.lower(arg)
     if toBool[arg_lower] == nil then
         arg_error(arg_name,