GOSUB
Sinds 3.1
GOSUB Label
Jump to a label declared elsewhere in the function. Then, if a
RETURN instruction is encountered,
the program comes back to run the code just after the GOSUB instruction.
GOSUB calls can be imbricated, until the memory is exhausted.
The same restrictions as
GOTO apply
Computed GOSUB
Sinds 3.19
GOSUB Expression
Since Gambas 3.19,
GOSUB (or
GOTO) can take any expression as argument.
This expression must return an integer that represents the label you want to branch.
This integer is obtained by using labels as expression. In that case, a labels is transformed into an integer index representing it (only in the function where the label is defined).
Only labels that are outside of any control structure can be a target of a computed GOTO or GOSUB.
Example
Dim JumpArray As Integer[]
JumpArray = [LABEL_1, LABEL_2, LABEL_3]
GoSub JumpArray[Rand(1, 3)]
Return
LABEL_1:
Print "One !"
Return
LABEL_2:
Print "Two !"
Return
LABEL_3:
Print "Three !"
Return
See also