Automatically closing Brackets in Formulas avoiding Powerbasics builtin Objects

[Theo Gottwald]

🔍 Just tested the subprogram below and it's a game changer! 🚀 It closes brackets on both sides, even in complicated cases. 💪 And it's all thanks to a stack.
But not just any stack, the built-in PowerBasicStack object. ⚡️ However, it's a bit slow. ⏱️ So I compared it to using a normal string, which also works in this case, and the difference in speed is mind-blowing.

⚡️ 74 ticks for PowerBasicStack vs. 21 ticks for normal string.

 🤯 #coding #programming #PowerBasicStack #bracketcloser #gamechanger #speed #stacks #strings

🤔 Have you ever wondered why Bob added those weird objects for stacks and queues in his latest version? 🤔 It goes against the core philosophy of smaller and faster in Power Basic. Instead, they are slow, bloated, and mostly useless. 🚫 #programming #powerbasic #stacks #queues 🚀

Code Select Expand

' More complex will also handle: "3.141*5)))+(((3.141*5)*(3.141*5.56"
'
#IF 1
SUB A_BBS(BYREF T01 AS STRING, BYVAL T03 AS STRING, BYVAL T04 AS STRING)
  LOCAL char AS STRING
  LOCAL V01 AS VARIANT
  REGISTER i AS LONG,j AS LONG
  Make_Stack(stack)

  V01=0
  FOR i = 1 TO LEN(T01)
    char = MID$(T01, i, 1)
    IF char = T03 THEN
      stack.Push V01
    ELSEIF char = T04 THEN
      IF stack.COUNT = 0 THEN
        ' Unmatched closing delimiter, add an opening delimiter at the beginning
        T01 = T03 & T01
        i = i + 1
      ELSE
        V01=stack.Pop
      END IF
    END IF
  NEXT i

  ' Add missing closing delimiters
  WHILE stack.COUNT > 0
    V01=stack.Pop
    T01 = T01 & T04
  WEND
END SUB
#ELSE
SUB A_BBS(BYREF T01 AS STRING, BYVAL T03 AS STRING, BYVAL T04 AS STRING)
    LOCAL char AS STRING
    LOCAL nesting AS STRING
    REGISTER i AS LONG, j AS LONG

    FOR i = 1 TO LEN(T01)
        char = MID$(T01, i, 1)
        IF char = T03 THEN
            nesting = nesting + "a"  ' Add a character for each opening delimiter
        ELSEIF char = T04 THEN
            IF LEN(nesting) = 0 THEN
                ' Unmatched closing delimiter, add an opening delimiter at the beginning
                T01 = T03 & T01
                i = i + LEN(T03)
            ELSE
                nesting = LEFT$(nesting, LEN(nesting) - 1)  ' Remove the last character
            END IF
        END IF
    NEXT i

    ' Add missing closing delimiters
    WHILE LEN(nesting) > 0
        T01 = T01 & T04
        nesting = LEFT$(nesting, LEN(nesting) - 1)
    WEND
END SUB
#ENDIF