writing an interpreted language

This is a discussion on writing an interpreted language within the C++ Programming forums, part of the General Programming Boards category; I've been thinking of ideas for a new project, and one of the ones that i'm liking alot now is ...

  1. #1
    Registered User Aran's Avatar
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    writing an interpreted language

    I've been thinking of ideas for a new project, and one of the ones that i'm liking alot now is making an interpreted programming language that's compiled into C++, then compiled with a C++ compiler into an exe.

    How difficult would this be to do?

    Will the langauge that i create have any potential for use?

    i'm also looking for someone with a few years of experience with varying programming languages to give me some syntax ideas and general advice.

    any help is greatly appreciated.

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    your language may take some speed hits unless you can work constantly to avoid the traps... as for how easy it would be to code, i think itd be too simple for someone like you that has almost 1000 posts here . this is more like a "translated language". is that a new term?

  3. #3
    Banned frenchfry164's Avatar
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    well the way you plan on doing it, wouldn't be too hard. Basically be good with I/O and converting stuff to C++. Then you're set.

    Now if you are making one that gets interpreted at run-time, that would be tricky.

  4. #4
    Guest Sebastiani's Avatar
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    Sounds pretty interesting. All you have to do ( well, in general ) is to interpret the input into C/C++ syntax, then feed the result directly into a command-line compiler. If you're good at parsing, the rest should be fairly straight-forward...
    Let me know how it goes.
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  5. #5
    Refugee face_master's Avatar
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    >>i think itd be too simple for someone like you that has almost 1000 posts here

    How do you know that 90% of his posts are not just things like:
    Hrrmmm....
    or:
    C'mon...20 hits and not posts??
    or:
    How do I clear the screen?
    Postcounts dont necessarily portray a person's ability to code, for eg. if some pro came to this board and had just signed up and had few posts, would you say that he was a newb just becuase of this fact?

  6. #6
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    Originally posted by face_master
    >>i think itd be too simple for someone like you that has almost 1000 posts here

    How do you know that 90% of his posts are not just things like:
    orr:Postcounts dont necessarily portray a person's ability to code, for eg. if some pro came to this board and had just signed up and had few posts, would you say that he was a newb just becuase of this fact?
    great speech ...

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    Registered User billholm's Avatar
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    Lightbulb

    >Postcounts dont necessarily portray a person's ability to code, for eg. if some pro came to this board and had just signed up and had few posts, would you say that he was a newb just becuase of this fact?


    Yah I agree!
    All men are created equal. But some are more equal than others.

    Visit me at http://www.angelfire.com/my/billholm

  8. #8
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    Potential use for an iterpreted language might be as a scripting language for games.

    U can do it the easy way by cheating and just use C defines for the language:

    A Basic style "define-language":
    Code:
    #define If if(
    #define Then ){
    #define EndIf }
    #define Else }else{
    #define Print(a) cout << a;
    
    If true == false Then
        Print("True")
    Else
        Print("False")
    EndIf
    put all the defines in a headerfile and include that file in all your "script-files"... compile with your standard compiler...

    If you want code that compile and execute runtime... then thats another question...

  9. #9
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    a scripting language for a game wouldnt have to be translated to C++. it would be more like executing the code at runtime.

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    face_master, billholm: it also looks to me like Aran here is a mod.

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    This looks interesting. What you could do is make a lexicon, and by using switch/case statements you could execute instructions based on the data read from a file. I'm a newbie to C++ but in C it would be like
    Code:
        FILE *fp;
        char str[80];
    
        fgets(&str, 80, fp);
    
        switch(str) 
          ...

  12. #12
    Registered User Aran's Avatar
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    i'm not a mod. and i'm actually a respected member here for my role in the GD board. I'm one of the people who first got ........ed of at one-line posts.

    I also know my way around C++ to some extent, although i've most of the time figured out my problems myself instead of calling on you more-than-able fellows to solve them.

    I'm going to first do that define thing, and see how it works.

    then i'm going to try and write a parser and a compiler that compiles into C++ then puts that through a command line compiler.

    this all should be very interesting.

    thanks alot for all of your ideas and suggestions, everyone.

  13. #13
    Guest Sebastiani's Avatar
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    And let me know if you get stuck on anything. I know I am technically a new coder ( 1 year ), but I love to program and I enjoy the problem-solving. Besides, it may help inspire me to move forward with writing that compiler I've been promising myself So keep me posted - eh?
    Code:
    #include <cmath>
    #include <complex>
    bool flip(bool value)
    {
           return std::pow
        (
            std::complex<float>(std::exp(1.0)), 
            std::complex<float>(0, 1) * std::complex<float>(std::atan(1.0)*(1 << (value + 2)))
        ).real() < 0;
    }

  14. #14
    Nerd Xmevs's Avatar
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    Hmm... weird... I've been thinking of doing the same... I just never got started... If you need any help with syntax and stuff, mail me...

  15. #15
    Registered User billholm's Avatar
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    Talking

    Here! Just posted a two-line post. Does
    this make you feel better? Hehehe.
    All men are created equal. But some are more equal than others.

    Visit me at http://www.angelfire.com/my/billholm

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