X-Git-Url: http://nitlanguage.org

diff --git a/lib/opts.nit b/lib/opts.nit
index ffa5954..30ea286 100644
--- a/lib/opts.nit
+++ b/lib/opts.nit
@@ -236,7 +236,13 @@ class OptionInt
 		super(help, default, names)
 	end
 
-	redef fun convert(str) do return str.to_i
+	redef fun convert(str)
+	do
+		if str.is_int then return str.to_i
+
+		errors.add "Expected an integer for option {names.join(", ")}."
+		return 0
+	end
 end
 
 # An option with a Float as parameter
@@ -281,7 +287,7 @@ class OptionContext
 	var rest = new Array[String]
 
 	# Errors found in the context after parsing
-	var errors = new Array[String]
+	var context_errors = new Array[String]
 
 	private var optmap = new HashMap[String, Option]
 
@@ -309,9 +315,10 @@ class OptionContext
 		end
 	end
 
-	# Parse and assign options everywhere in the argument list
-	fun parse(argv: Collection[String])
+	# Parse and assign options in `argv` or `args`
+	fun parse(argv: nullable Collection[String])
 	do
+		if argv == null then argv = args
 		var it = argv.iterator
 		parse_intern(it)
 	end
@@ -372,7 +379,7 @@ class OptionContext
 
 		for opt in options do
 			if opt.mandatory and not opt.read then
-				errors.add("Mandatory option {opt.names.join(", ")} not found.")
+				context_errors.add("Mandatory option {opt.names.join(", ")} not found.")
 			end
 		end
 	end
@@ -387,10 +394,10 @@ class OptionContext
 	end
 
 	# Options parsing errors.
-	fun get_errors: Array[String]
+	fun errors: Array[String]
 	do
 		var errors = new Array[String]
-		errors.add_all(errors)
+		errors.add_all context_errors
 		for o in options do
 			for e in o.errors do
 				errors.add(e)