Gave a more descriptive error message for when a non-argument variable causes a parsing failure. (#256)

drewmccormack · web-flow · commit 41f5fe52a34b · 2021-01-05T10:22:31.000-06:00
diff --git a/Sources/ArgumentParser/Usage/UsageGenerator.swift b/Sources/ArgumentParser/Usage/UsageGenerator.swift
@@ -339,7 +339,7 @@ extension ErrorMessageGenerator {
     }
     switch possibilities.count {
     case 0:
-      return "Missing expected argument"
+      return "No value set for non-argument var \(key). Replace with a static variable, or let constant."
     case 1:
       return "Missing expected argument '\(possibilities.first!)'"
     default:

Original file line number	Diff line number	Diff line change
`@@ -339,7 +339,7 @@ extension ErrorMessageGenerator {`
`339`	`339`	`}`
`340`	`340`	`switch possibilities.count {`
`341`	`341`	`case 0:`
`342`		`- return "Missing expected argument"`
	`342`	`+ return "No value set for non-argument var \(key). Replace with a static variable, or let constant."`
`343`	`343`	`case 1:`
`344`	`344`	`return "Missing expected argument '\(possibilities.first!)'"`
`345`	`345`	`default:`