1 files changed, 23 insertions, 24 deletions
diff --git a/src/Uri.cpp b/src/Uri.cpp
index da1b9f8..5c4002d 100644
--- a/src/Uri.cpp
+++ b/src/Uri.cpp
@@ -80,6 +80,27 @@ namespace {
         return !stillPassing(' ', true);
     }
 
+    bool IsCharacterInSet(
+        char c,
+        std::initializer_list< char > characterSet
+    ) {
+        for (
+            auto charInSet = characterSet.begin();
+            charInSet != characterSet.end();
+            ++charInSet
+        ) {
+            const auto first = *charInSet++;
+            const auto last = *charInSet;
+            if (
+                (c >= first)
+                && (c <= last)
+            ) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     /**
      * This function returns a strategy function that
      * may be used with the FailsMatch function to test a scheme
@@ -98,31 +119,9 @@ namespace {
             } else {
                 bool check;
                 if (*isFirstCharacter) {
-                    check = (
-                        (
-                            (c >= 'a')
-                            && (c <= 'z')
-                        ) || (
-                            (c >= 'A')
-                            && (c <= 'Z')
-                        )
-                    );
+                    check = IsCharacterInSet(c, { 'a','z', 'A','Z' });
                 } else {
-                    check = (
-                        (
-                            (c >= 'a')
-                            && (c <= 'z')
-                        ) || (
-                            (c >= 'A')
-                            && (c <= 'Z')
-                        ) || (
-                            (c >= '0')
-                            && (c <= '9')
-                        )
-                        || (c == '+')
-                        || (c == '-')
-                        || (c == '.')
-                    );
+                    check = IsCharacterInSet(c, { 'a','z', 'A','Z', '0','9', '+','+', '-','-', '.','.' });
                 }
                 *isFirstCharacter = false;
                 return check;