Redscript
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Built-in Types

Built-in types available in the game runtime.

Logical Types

Keyword
Type
Values
Bool
Boolean logic type
true false

Integer Types

Keyword
Type
Range
Int8
8-bit Signed Integer
-128 to 127
Uint8
8-bit Unsigned Integer
0 to 255
Int16
16-bit Signed Integer
-32,768 to 32,767
Uint16
16-bit Unsigned Integer
0 to 65,535
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 string constant
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.

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. 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
&=
-
✓
-
-
-
-
Assign Bitwise Or
|=
-
✓
-
-
-
-

Notes

  1. 1.
    The Logical Not ! operator for TweakDBID is overridden to return !TDBID.IsValid(a)
  2. 2.
    Strings can be multiplied by an Int32 to repeat the string:
    public static func OperatorMultiply(a: String, count: Int32) -> String
  3. 3.
    String addition is concatenation. There are native functions to allow most types can be concatenated with String
  4. 4.
    CName and TweakDBID addition is concatenation (and presumably involves some kind of internal lookup to a known value)
  5. 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.
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Last modified 1yr ago