Constant Expression
Since 3.17
Constant expressions are integer expressions that are evaluated at compile time,
and that can be used in the following places:
These expressions only support a subset of Gambas operators and pre-defined constants.
Here is what you can use inside a constant expression:
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Arithmetic operators.
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+, -, *, /, \, DIV, %, MOD
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Logical operators.
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AND, OR, XOR, NOT
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Bitwise operators.
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Shl, Shr, Asl, Asr, Lsl, Lsr
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Size of a native numerical or date datatype.
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SizeOf
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Boolean constants
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TRUE, FALSE
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Native datatype constants.
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gb.Boolean
gb.Byte
gb.Short
gb.Integer
gb.Long
gb.Single
gb.Float
gb.Date
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Any private integer constant identifier previously declared.
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In the context of constant integer expressions, The / operator acts like the integer division operator \.
Examples
Public Const Alpha As Integer = 1
Public Const Beta As Integer = (Alpha * 2) + 1
Public Const Delta As Byte = Beta + Alpha
Private Enum FirstFlag = 1 Shl 0, SecondFlag = 1 Shl 1, ThirdFlag = 1 Shl 2
Private SomeEmbeddedArray[Delta * SizeOf(gb.Short)] As String