From b1be377295ab70e4462a02f1299d393bd9e07a17 Mon Sep 17 00:00:00 2001
From: Arto Bendiken <arto@bendiken.net>
Date: Sun, 17 Jan 2016 10:22:26 +0000
Subject: Support mixed-case language tags

See: https://www.w3.org/TR/turtle/#grammar-production-LANGTAG
---
 src/reader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/reader.c')

diff --git a/src/reader.c b/src/reader.c
index 3e859765..e49c2a10 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -761,7 +761,7 @@ read_LANGTAG(SerdReader* reader)
 	}
 	Ref ref = push_node(reader, SERD_LITERAL, "", 0);
 	push_byte(reader, ref, eat_byte_safe(reader, c));
-	while ((c = peek_byte(reader)) && in_range(c, 'a', 'z')) {
+	while ((c = peek_byte(reader)) && is_alpha(c)) {
 		push_byte(reader, ref, eat_byte_safe(reader, c));
 	}
 	while (peek_byte(reader) == '-') {
-- 
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