CINT – A C/C++ interpreter | Hacker News Reader

CINT – A C/C++ interpreter

hanno.jp

29 points_zhqs16 comments

Please don't use CINT. It's good for a few things, specifically histograms, but too many grad student-years have been wasted on segfaults, stack overflows, and cryptic error messages. I haven't had the chance to use cling, but CINT will almost always bite you in the ass as soon as your code is non trivial.

CINT is old. Their new interpreter is called Cling and is based on LLVM.

There is also the Juce projucer which claims live C++11 on mac (and windows at some point). I haven't had a chance to use the live programming but at least the interface so far is slick.

I can't wait for Autocompletion support in cling.

People interested in CINT and Cling might also be interested in Cxx.jl: https://github.com/Keno/Cxx.jl. It provides a C++ REPL mode for Julia and integrates Clang with Julia and the LLVM JIT to provide a powerful C++ FFI (the author has started using to wrap ROOT).

OT: Check out that layout! Chrome 46/OS X took >4s to resolve the boxes, borders, and positions in steps making it look like a low-frame animation. The HTML is just shy of 300 lines but apparently tables with styles on every cell can still do that.

It's not a layout issue. There are 50+ tiny requests for images of the background and borders. If anything, this shows the reason to use css sprites.

I think CINT was superseded by cling.

Does cling support a C99 or C11 mode?

A lot of times, for C development and related endeavors, I want to quickly determine the size of a struct or do some quick tests with strange arithmetic or casting or whatever else. Usually I just write a tiny test program, compile it, run it, and look at my printf output. This is pretty slow though. Having a C REPL would be quite nice.

It would be nice to see a wrapper around GCC that does this, for, say, a kernel source REPL.

AFAIK, it's only C++.

EDIT: you can pass it the -x c flag.

AMAZING: -x c

Thanks!

The best way might be to use TinyCC.

You can compile C to a byte array, cast it to a function and run it.

I don't know of any REPL so far though (which is surprising).

  $ git clone https://github.com/zsaleeba/picoc
  ...
  Receiving objects: 100% (3305/3305), 1.29 MiB | 0 bytes/s, done.
  ...
  $ make
  ...
  $ ./picoc -i
  starting picoc v2.2 beta r
  picoc> int i = 1;
  picoc> printf("%d\n", i);
  1
  picoc> printf("%d\n", sizeof(i));
  4
  picoc>

You might need to nuke the -DVER in the CFLAGS (this code hasn't changed since it was ported from Google Code, which uses svn, but there's no .svn in the dir anymore, so it breaks). I also needed libreadline6-dev.

Oh, and to make things easier, a clickable link: https://github.com/zsaleeba/picoc

Not sure I would trust CINT to pad structs the same way as your compiler.

About a very simple C REPL, see my comment reply to CyberDildonics.

Check out my screencast on Cling (which is CINT's successor): http://www.youtube.com/watch?v=Lbi7MLS03Yc

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