CalculateBooleanExpression
Function CalculateBooleanExpression(expression: String) : Boolean
Returns the result of the expression as a Boolean.
This function calculates an expression such as "oranges AND ( bananas OR apples )" where apples, oranges and bananas would be VirtualVariables, and returns the result.
For more information on expression formatting, see Parser Logic and Maths.
You can also use ParserConstants, ParserMacroExpressions and ParserShortcuts.
Example:
Program
Uses basilisk, pure2d
Begin
InitBasilisk(TRUE)
OpenScreen(640,480,32,FALSE,COB_SHOWCLOSE+COB_SHOWBORDER)
VirtualString("snake1","Cobra")
VirtualString("snake2","Basilisk")
VirtualString("foo",CalculateStringExpression("Turn Your [snake1] Into a [snake2]!"))
VirtualString("macro_expression","( 2.1 + 3.2 )")
VirtualReal("bar1",CalculateRealExpression("3.1 * ( 2.1 + 3.2 )"))
VirtualReal("bar2",CalculateRealExpression("3.1 * $macro_expression"))
VirtualReal("bar3",CalculateRealExpression("bar1 + bar2"))
VirtualInteger("bar4",CalculateIntegerExpression("bar3"))
VirtualBoolean("bar5",CalculateBooleanExpression("TRUE AND ( TRUE XOR FALSE )"))
Text(10,10, "String Expression: "+VirtualString("foo"))
Text(10,30, "Calculation Result 1 (Real): "+VirtualReal("bar1"))
Text(10,50, "Calculation Result 2 (Real): "+VirtualReal("bar2"))
Text(10,70, "Calculation Result 3 (Real): "+VirtualReal("bar3"))
Text(10,90, "Calculation Result 4 (Int): "+VirtualInteger("bar4"))
Text(10,110, "Calculation Result 5 (Boolean): "+VirtualBoolean("bar5"))
While Not ExitRequested
Flip
Pause(2)
Wend
End