Where communities thrive


  • Join over 1.5M+ people
  • Join over 100K+ communities
  • Free without limits
  • Create your own community
People
Activity
    CyrusNajmabadi
    @CyrusNajmabadi
    so like... (value - start) % step == 0?
    you're basically asking: could i step an exact number of times from start and that added to start would equal value.
    Mohammad Hamdy Ghanem
    @VBAndCs
    I am adding new language features to small basic, such as indexing string x[0]. This one was easy as i am working on the sb vetsion that has no runtime. It just generates il code which calls the methods of the primitive class to do every thing. So i just modified the primative class to ondex the string with some more fantastic features when calling the indexer setter, like padding spaces when the index is negative or greater that the string length, and allowing setting a string with any lingth i
    I am now trying to add array initializer
    I did the parsing part smoothly and it allows nested {}
    The code compiles fine, but of couse i don't know how to emit il code for that!
    I can't use a method in the premative class because sb will not accept param array
    Ineed to do it at the il level
    A work arroun is to lower the initializer to many arrat cells assignment
    Mohammad Hamdy Ghanem
    @VBAndCs
    But this will mess with the line numbers in err messages
    So, il it is
    Any idea where to begin reading?
    It can seem daunting at first.
    But it's actually super simple
    And then you realize there's no magic here. Just a lot of basic opcodes that do sensible things
    Cory Smith
    @DualBrain
    @CyrusNajmabadi 👍
    Mohammad Hamdy Ghanem
    @VBAndCs
    Thanks @CyrusNajmabadi
    I already solved the issue and aray initializerscworks now in sb (will puplish it in minutes) :)
    I totakly avoided il. I tried to deliver to the il generator only the syntax it understands
    So, i loweted the code in the emit phase to avoid altering the source code text
    Mohammad Hamdy Ghanem
    @VBAndCs
    To do that, i cteated the lowed code as a separit code, parsed and analyzed it, then added the resuling info to the original compilation,. Finally i used the same generator scope to emit il for the new parse tree of the lowered code
    And since i am already in the middle of ghe emmit phase, the il for the lowered code is its right pos, and of course i don't emit anything for the original array initializer
    Il spy is a grate help, since i used it to figure out what i did wrong in emmiting il.
    Mohammad Hamdy Ghanem
    @VBAndCs
    Small basic compiler is super easy. It is not efficient for real world apps, because the primitive type is bad for business. It represens string, douple and string array, which is acually a string dictionary, that is serialised as a string and saved in the string field! The idea is brilliant, making sb easy for kids and the compiler itself is very small, but of course ghis makes the language kess efficient
    I like it that way. It should always be for educational purpose.
    I am just doing some enhancements to make it more enjoyable for kids.
    Mohammad Hamdy Ghanem
    @VBAndCs
    By the way i restored next and wend to for and while loops. Endfor and endwhile are still valid, but the editor auto inserts next and wend. I hate end while in vb.net and use do loop insteed. End kills the loop. Basic is all about readability and consistency.
    Mohammad Hamdy Ghanem
    @VBAndCs
    Mohammad Hamdy Ghanem
    @VBAndCs
    Mohammad Hamdy Ghanem
    @VBAndCs
    Small Visual Basic 1.0 is ready for preview. Please report any issues. I think it will be fun for kids and beginners. I will include some more windows controls in the release version, but now I want to make sure sVB is stable in its current state.
    https://github.com/VBAndCs/sVB-Small-Visual-Basic/releases/tag/v1.0-preview
    Adam Speight
    @AdamSpeight2008

    re @paul1956 @CyrusNajmabadi

    I think it was proposed to replace the For loop to handle the edge cases. While i.Inbetween(Byte.Min, Byte.Max, Step:=2) But maybe Adam had something else in mind.

    I am just thinking about the clauses used in Case Statements, to see if I can extract the out in a general pattern matching syntax.

    Select Case operand
           Case min To max Step stepping
           Case Else
    End Select

    So thinking about a smarter lowering, for the step case.

    CyrusNajmabadi
    @CyrusNajmabadi
    i genuinely don't understand what the stepping has to do with here.
    what is the use case?
    start with the real world scenario where you need this. otehrwise it just seems strange and unneeded in the language
    Mohammad Hamdy Ghanem
    @VBAndCs
    If x mod 2 = 1 andalso x >= 3 andalso x<=11
    Select case x: case 3 to 11 step 2
    Seems nice
    CyrusNajmabadi
    @CyrusNajmabadi
    when woudl you write that code?
    put another way: absent an actual demonstrative compelling use case, there's no way we would take such a change in the langauge
    Cory Smith
    @DualBrain
    Is there a desire to somehow change the stepping while the loop in executing? Or is this something that is somehow trying to determine a calculated stepping amount depending on the quantity of the min and max before the initial loop starts?
    CyrusNajmabadi
    @CyrusNajmabadi
    i legit don't even knwo the scenario this is trying to improve
    i've asked this a few times with no response :)
    stepping back: we do not make language changes speculatively
    100% of hte time we have at least 1 scenario we know of that can act as hte examplar of why we'd want this
    this is the canonical example we can use when thinking about this space to go: ah yes... i see why we'd want this
    as well as: ah yes, this solution seems to at least actually solve taht use case.
    because you'd be surprised by how many language requests can't actually even give a case where they would be used, and how many requests ask for something that doesn't even adequately solve the case provided! :)
    Cory Smith
    @DualBrain
    @CyrusNajmabadi agreed. I'm having a hard time imagining what this might entail; one one hand I'm "why would this ever be needed" while on the other I'm "looks like there is something I might be missing here... some idea that I'm too thick headed to see".
    Mohammad Hamdy Ghanem
    @VBAndCs

    VB gives non-sense errors regarding ArressOf. See this sample:

    class Designer
        sub Designer_Loaded()
    
        End Sub
    
        Shared Sub Foo()
            AddHandler CurrentPage.Loaded, AddressOf Designer_Loaded ' Error 1
            AddHandler CurrentPage.Loaded, AddressOf Designer.Designer_Loaded ' Error 2
            AddHandler CurrentPage.Loaded, AddressOf CurrentPage.Designer_Loaded ' OK
        End Sub
    
    End class

    Error 1:

    annot refer to an instance member of a class from within a shared method or shared member initializer without an explicit instance of the class.

    Error 2:

    Reference to a non-shared member requires an object reference.