cling
magic_get
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cling | magic_get | |
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19 | 9 | |
3,329 | 193 | |
1.7% | - | |
8.6 | 8.2 | |
13 days ago | 5 months ago | |
C++ | C++ | |
GNU General Public License v3.0 or later | Boost Software License 1.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
cling
- Cling 1.0 Released
- Cling: Interactive C++ Interpreter
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Interactive GCC (igcc) is a read-eval-print loop (REPL) for C/C++
More recent activity, but based on clang: https://github.com/jupyter-xeus/xeus-cling https://github.com/root-project/cling
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It's 2023, so of course I'm learning Common Lisp
> The repl driven workflow is amazing and the lisp images are rock solid and highly performant.
do people not realize that basically everything vm/interpreted language has a repl these days?
https://www.digitalocean.com/community/tutorials/java-repl-j...
https://github.com/waf/CSharpRepl
https://pub.dev/packages/interactive
not to mention ruby, python, php, lua
hell even c++ has a janky repl https://github.com/root-project/cling
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Compiled and Interpreted Languages: Two Ways of Saying Tomato
Interactive C++ with Cling, https://blog.llvm.org/posts/2020-11-30-interactive-cpp-with-cling/, https://github.com/root-project/cling/, Relaxing the One Definition Rule in Interpreted C++, https://dl.acm.org/doi/10.1145/3377555.3377901 (PDF: https://www.researchgate.net/publication/339463915_Relaxing_the_one_definition_rule_in_interpreted_C)
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dont want online ones
Want to see your mind blown? Check out cling, a (sort of) C and C++ interpreter (it's a REPL). Or the work in progress, live-developed clauf, a real C interpreter.
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How to cling for execute code plugin?
Cling: https://github.com/root-project/cling
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Do you use Wokwi to test/simulate/debug your ESP32/Arduino code, or are there other dev tools a better fit for the ESP32?
Wanting to just test pure c or c++ functions that are hardware independent -> (solution that I'm using): cling just in time compiler, gives a shell that you can just experiment with C++ expressions
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gcc is pre installed but g++ not?
C++ source cannot contain a shebang, but you can make them executable with binfmt-misc, and have the kernel pass them to a C++ interpreter such as Cling upon execution. Pretty much the same as running Python or Bash scripts.
- Fête à bord d’un avion de Sunwing | L’organisateur s’explique sur l’origine de sa fortune
magic_get
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What is a good way to iterate through struct contents?
Maybe this: https://github.com/apolukhin/magic_get
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What information about a type/class can we get?
You can access non-static member variables with structured bindings. See for instance magic_get/boostPfr https://github.com/apolukhin/magic_get. Structured bindings will only bind to the accessible members (not private). Magic get works by by finding the number of member variables, converting the struct to a tuple (with a function that is specialized for the number of fields), and finally accessing the members through the tuple (supporting indexing and iteration). It does not grant access to the member names, but it is sufficient for some reflection.
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A way to determine the number of elements in a structured binding
Libraries like magic_get expose the members of an aggregate class/struct to allow writing generic code for things like pretty printing and serialization without anything special done to the class itself. They often rely on structured bindings for the decomposition (*), but find the number of elements via SFINAE on aggregate initialization, as an aggregate type can be initialized only from as many objects as it has members. It would be nicer if you could SFINAE directly on the structured binding itself, as then the type could have user-defined constructors (which aggregates can't). Unfortunately, this is not possible since structured binding is a statement and not an expression. Unless you're using Clang, where the GNU statement expressions extension allows you to do SFINAE on them, as in here.
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Minimum viable declarative GUI in C++
No RTTI required, but the types are required to be aggregates (no constructors defined). It's possible to count the number of members using SFINAE by trying different numbers of inputs to the aggregate constructor using a type that's castable to anything, and then enumerate the members with a similar trick (or use structured binding to pull them out directly). I think he uses magic_get which is the most popular library for this trick.
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Call function on each member of struct using preprocessor
take a look at magic_get to get access to all struct members. No idea what your plan is with foo and the preprocessor though.
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Serdepp 0.1.2 Released
Neat! Have you considered using magic_get?
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Getting information about classes, methods and variables in C++?
It is possible with some hacks https://github.com/apolukhin/magic_get
- Struct bulk operations - Reflection? Code gen?
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Reflecting Over Members of an Aggregate
I actually reference it near the bottom of the article under its original name, magic_get! I was disappointed to discover that this library did it a similar way first before me while researching 😅
What are some alternatives?
termux-ndk - android-ndk for termux
pfr - std::tuple like methods for user defined types without any macro or boilerplate code
xeus-cling - Jupyter kernel for the C++ programming language
cppreference-doc - C++ standard library reference
femtolisp - a lightweight, robust, scheme-like lisp implementation
serdepp - c++ serialize and deserialize adaptor library like rust serde.rs
sectorlisp - Bootstrapping LISP in a Boot Sector
foth - Tutorial-style FORTH implementation written in golang
mal - mal - Make a Lisp
OpenSceneGraph - OpenSceneGraph git repository
lldb-mi - LLDB's machine interface driver