feat(string): add functions to categorize strings

Redcraft.Utility/Source/Public/String/StringView.h

@@ -377,6 +377,52 @@ public:
 		return RFind([Char](ElementType C) { return C != Char; }, Index);
 	}
 
+public:
+
+	/** @return true if the string only contains valid characters, false otherwise. */
+	NODISCARD constexpr bool IsValid() const
+	{
+		for (ElementType Char : *this)
+		{
+			if (!TChar<ElementType>::IsValid(Char)) return false;
+		}
+
+		return true;
+	}
+
+	/** @return true if the string only contains ASCII characters, false otherwise. */
+	NODISCARD constexpr bool IsASCII() const
+	{
+		for (ElementType Char : *this)
+		{
+			if (!TChar<ElementType>::IsASCII(Char)) return false;
+		}
+
+		return true;
+	}
+
+	/** @return true if the string only contains numeric characters, false otherwise. */
+	NODISCARD constexpr bool IsNumeric() const
+	{
+		for (ElementType Char : *this)
+		{
+			if (!TChar<ElementType>::IsDigit(Char)) return false;
+		}
+
+		return true;
+	}
+
+	/** @return true if the string only contains numeric characters, false otherwise. */
+	NODISCARD constexpr bool IsNumeric(unsigned Base) const
+	{
+		for (ElementType Char : *this)
+		{
+			if (!TChar<ElementType>::IsDigit(Char, Base)) return false;
+		}
+
+		return true;
+	}
+
 public:
 
 	/**