NativeTypes

Native Types

Logical Types

Keyword	Type	Values
Bool	Boolean logic type	true false
EBOOL	Enum-based nullable bool	UNINITIALZED = 0 FALSE = 1 TRUE = 2

EBOOL seems to only be used by the Cooldown system and as a m_isInitialized field in class ScriptedPuppetPS (presumably legacy code from older RED engine games)

Integer Types

Keyword	Type	Range
Int8	8-bit Signed Integer	Currently unsupported by the compiler
Uint8	8-bit Unsigned Integer	Currently unsupported by the compiler
Int16	16-bit Signed Integer	Currently unsupported by the compiler
Uint16	16-bit Unsigned Integer	Currently unsupported by the compiler
Int32	32-bit Signed Integer	−2,147,483,648 to 2,147,483,647
Uint32	32-bit Unsigned Integer	0 to 4,294,967,295
Int64	64-bit Signed Integer	−9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
Uint64	64-bit Unsigned Integer	0 to 18,446,744,073,709,551,615

Floating-Point Types

Keyword	Type	Range
Float	32-bit Single-Precision	6-9 significant decimal digits (more info)
Double	64-bit Double-Precision	15-17 significant decimal digits (more info)

Literal Types

Keyword	Type	Prefix	Example
String	Mutable character string		"Hello world"
CName	Non-mutable character string	n	n"VehicleComponent"
ResRef	Resource reference path	r	r"base\\anim_cooked.cookedanims"
TweakDBID	TweakDB Record ID	t	t"Items.RequiredItemStats"

String values are stored internally as a null-terminated character array, unfortunately the bytecode doesn't support accessing the individual characters as an array.

CName values are stored in-engine as a 64-bit hash key to a interned string pool. Class, function and field names are stored in the CName pool, so any methods that need a dynamic reference a scripted component will use a CName value.

ResRef values are similar to CName values, except they specifically refer to archive resource files and presumably use a separate optimized string pool. Unlike CName, ResRef doesn't have any defined operators.

TweakDBID is used as the primary key for all *_Record types stored in TweakDB, the engine's internal database. They are represented internally using a composite hash key made from:

• A CRC-32 hash of the record's name,
• A byte storing the name length, and
• 3 bytes for storing the offset of a value within that record

Other Types

Keyword	Type
Variant	A dynamic type that can store any other type

Operators

The RED4 scripting runtime implements most operators as native functions (presumably for speed purposes). Only the equals == and not equals != operators are implemented in bytecode. The redscript compiler provides a number of operator symbols as shorthand.

This table lists the available operators (in precedence block order) and what types support them.

Type	Symbol	Logical	Integer	Float	String	CName	TweakDBID
Negate	-	-	✓	✓	-	-	-
Logical Not	!	✓	-	-	-	-	✓¹
Bitwise Not	~	-	✓	-	-	-	-
Multiplication	*	-	✓	✓	✓²	-	-
Division	/	-	✓	✓	-	-	-
Modulo	%	-	✓	✓	-	-	-
Addition	+	-	✓	✓	✓³	✓⁴	✓⁴
Subtraction	-	-	✓	✓	-	-	-
Less Than	<	-	✓	✓	-	-	-
Less Than or Equal	<=	-	✓	✓	-	-	-
Greater Than	>	-	✓	✓	-	-	-
Greater Than or Equal	>=	-	✓	✓	-	-	-
Equals	==	✓	✓	✓	✓	✓⁵	✓
Not Equals	!=	✓	✓	✓	✓	✓⁵	✓
Logical And	&&	✓	-	-	-	-	-
Logical Or	||	✓	-	-	-	-	-
Bitwise And	&	-	✓	-	-	-	-
Bitwise Or	|	-	✓	-	-	-	-
Bitwise Xor	^	-	✓	-	-	-	-
Assign	=	✓	✓	✓	✓	✓	✓
Assign Add	+=	-	✓	✓	✓	-	✓
Assign Subtract	-=	-	✓	✓	-	-	-
Assign Multiply	*=	-	✓	✓	-	-	-
Assign Divide	/=	-	✓	✓	-	-	-
Assign Bitwise And	none⁶	-	✓	-	-	-	-
Assign Bitwise Or	none⁶	-	✓	-	-	-	-

Notes

1. The Logical Not ! operator for TweakDBID is overridden to return !TDBID.IsValid(a)
2. Strings can be multiplied by an Int32 to repeat the string:

   public static func OperatorMultiply(a: String, count: Int32) -> String

3. String addition is concatenation. There are native functions to allow most types can be concatenated with String
4. CName and TweakDBID addition is concatenation (and presumably involves some kind of internal lookup to a known value)
5. The redscript compiler doesn't currently support the == and != symbols for the CName type, use the Equals(a,b) and NotEquals(a,b) intrinsic functions for now.
6. These functions aren't currently supported by symbol, but native functions exist for each integer type:

   public static native func OperatorAssignAnd(out a: Uint64, b: Uint64) -> Uint64
   public static native func OperatorAssignOr(out a: Uint64, b: Uint64) -> Uint64