From: Jean Privat <jean@pryen.org>
Date: Mon, 21 Jul 2014 15:55:54 +0000 (-0400)
Subject: annotation: add arg_as_id
X-Git-Tag: v0.6.7~31^2~2
X-Git-Url: http://nitlanguage.org

annotation: add arg_as_id

I do not know why is was forgot

Signed-off-by: Jean Privat <jean@pryen.org>
---

diff --git a/src/annotation.nit b/src/annotation.nit
index d4a13ac..a0d397e 100644
--- a/src/annotation.nit
+++ b/src/annotation.nit
@@ -84,6 +84,20 @@ redef class AAnnotation
 		modelbuilder.error(self, "Annotation error: \"{name}\" expects a single Int as argument.")
 		return null
 	end
+
+	# Get the single argument of `self` as an identifier.
+	# Raise error and return null on any inconsistency.
+	fun arg_as_id(modelbuilder: ModelBuilder): nullable String
+	do
+		var args = n_args
+		if args.length == 1 then
+			var arg = args.first.as_id
+			if arg != null then return arg
+		end
+
+		modelbuilder.error(self, "Annotation error: \"{name}\" expects a single identifier as argument.")
+		return null
+	end
 end
 
 redef class AAtArg