Operator LET() (Assignment)
Assigns fields of a user defined type to a list of variables
Syntax:
Let( variable1 [, variable2 [, ... ]] ) = UDT_var
or
Let( variable1 [, variable2 [, ... ]] ) => UDT_varParameters:
variable1 [, variable2 [, ... ]]
Comma separated list of variables to receive the values of the UDT variable's fields.
UDT_var
A user defined type variable.
Description:
Assigns the values from the UDT_var variable's fields to the list of variables.
When the UDT Extends a Base, the first variable (variable1) assigned by the operator then corresponds to a Base instance (only the other variables are those to receive the values of the data fields of the UDT).
Union is not supported.
When the UDT Extends a Base, the first variable (variable1) assigned by the operator then corresponds to a Base instance (only the other variables are those to receive the values of the data fields of the UDT).
Union is not supported.
Examples:
Type Vector3D
x As Double
y As Double
z As Double
End Type
Dim a As Vector3D = ( 5, 7, 9 )
Dim x As Double, y As Double
'' Get the first two fields only
Let( x, y ) = a
Print "x = "; x
Print "y = "; y
x As Double
y As Double
z As Double
End Type
Dim a As Vector3D = ( 5, 7, 9 )
Dim x As Double, y As Double
'' Get the first two fields only
Let( x, y ) = a
Print "x = "; x
Print "y = "; y
Output:
x = 5 y = 7
Type Parent
Dim As Integer p1, p2
End Type
Type Child Extends Parent
Dim As Integer c1, c2
End Type
Type GrandChild Extends Child
Dim As Integer gc1, gc2
End Type
Dim As GrandChild gc = Type(1, 2, 3, 4, 5, 6)
Dim As Integer i1, i2
Dim As Integer j1, j2
Dim As Parent p
Dim As Child c
Let(c, i1, i2) = gc
Print c.p1, c.p2, c.c1, c.c2, i1, i2
Let(p, j1, j2) = gc
Print p.p1, p.p2, j1, j2
Dim As Integer p1, p2
End Type
Type Child Extends Parent
Dim As Integer c1, c2
End Type
Type GrandChild Extends Child
Dim As Integer gc1, gc2
End Type
Dim As GrandChild gc = Type(1, 2, 3, 4, 5, 6)
Dim As Integer i1, i2
Dim As Integer j1, j2
Dim As Parent p
Dim As Child c
Let(c, i1, i2) = gc
Print c.p1, c.p2, c.c1, c.c2, i1, i2
Let(p, j1, j2) = gc
Print p.p1, p.p2, j1, j2
Output:
1 2 3 4 5 6 1 2 5 6
Dialect Differences:
- Only available in the -lang fb dialect.
Differences from QB:
- New to FreeBASIC
See also:
Back to Assignment Operators
Back to Operators
