read
PEGTL
read | PEGTL | |
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12 | 12 | |
54 | 1,867 | |
- | 0.9% | |
0.0 | 7.2 | |
10 months ago | 9 days ago | |
C++ | C++ | |
GNU General Public License v3.0 only | Boost Software License 1.0 |
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read
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C++ And Beyond: Discussion - Vittorio Romeo, Kevlin Henney, Nico Josuttis & Kate Gregory - ACCU 2023
It was on the mailing list that screens proposals prior to writing papers. Basically it was for making input much easier to work with, like this: https://github.com/ShakaUVM/read
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The Future of Boost by Vinnie Falco
I have thought about submitting a library of mine (https://github.com/ShakaUVM/read) for standardization or inclusion in Boost. Basically it does for input what format did for output - replace the stream system with something more functional.
- Keep getting a loop when I enter a letter instead of a number.
- What are some cool modern libraries you enjoy using?
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Read a string from user
Using readlib:
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Steams operations order?
That's why I wrote my read library (https://github.com/ShakaUVM/read). You can just do:
- Why is my program skipping a cin input?
- Why am I able to capture data from text file with std::ifstream with either std::getline or extraction operator >> but not unable to do so by going back and forth between the two??
- std::cin doesn't work after entering the wrong input
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What (relatively) easily to implement features would you like to see in c++23.
5) Make input come from functions rather than call by reference, such as what I did here: https://github.com/ShakaUVM/read
PEGTL
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Show HN: Matcheroni, a tiny C++20 header library for building lexers/parsers
Very cool, and I like the name!
I'd be interested in reading about how Matcheroni compares with PEGTL and Lexy.
https://github.com/taocpp/PEGTL
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Use PEGTL to remove my clunky homemade parser
I found a library I wanted to test: Pegtl
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What are some cool modern libraries you enjoy using?
I like PEGTL
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Are C/C++ developers allowed to import libraries to make coding easier or are they expected to build every functions and methods from scratch (without importing anything like String.h)?
Sure - libraries that are expected to be entirely self-contained. The one that comes to mind is PEGTL, a parser combinator library that is intended to be embedded inside a larger program. Making it import more dependencies would break this philosophy. Similarly, in the Rust world, there are a variety of "no-std" crates that should be able to be imported even if the standard library is not available on the target platform.
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TIL: Visual Studio has quantum state values 🤨
The program in the post was just an example meant to illustrate the problem. Originally, this (new) behavior of MSVC broke my code in the PEGTL, see [this commit](https://github.com/taocpp/PEGTL/commit/e3c8cb499dc3d1d76d23f2d5d79469dcb15550c5) that I needed to apply to fix it.
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We Built a C++ Rendering Engine for the Web
As a professional C++ programmer I feel a lot of the reasons C++ gets this response is because it's simply not "batteries included" like Go or Rust.
C++ is a very powerful, unopinionated language, that gives you a lot of freedom to attack your problem domain the way you best see fit.
If you're writing a networked application, don't use POSIX sockets, go and find a higher level library. If you're parsing complex text formats, don't iterate over buffers with char*'s, go pick up PEGTL[0]. If you're working on graphs, or need to properly index in-memory data, go pick up Boost[1][2]. If you need a GUI, go pick up Qt.
It's extremely common in C++, due to the lack of a universal package management solution, for people to try and "muddle through" and do shit themselves when it's far outside their core competency.
At one of my last employers, the core product was parsing JSON with std::regex, simply because they couldn't be bothered to integrate a JSON library.
[0] https://github.com/taocpp/PEGTL
[1] https://www.boost.org/doc/libs/1_76_0/libs/graph/
[2] https://www.boost.org/doc/libs/1_76_0/libs/multi_index/doc/i...
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Is there anything like sly for C++?
You are looking for Boost.Spirit (https://www.boost.org/doc/libs/1_76_0/libs/spirit/doc/x3/html/index.html) or PEGTL (https://github.com/taocpp/PEGTL)
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Why no more Lex/Yakk/ANTLR/whatever?
I personally prefer to use parsing combinator libraries in C++, where the "grammar" is just part of normal C++ and directly integrate. Examples are Boost.Spirit, pegtl, or (my own) lexy.
- Rust's Most Unrecognized Contributor
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Wondered if anyone is interested in a c++ parser combinators library?
While I'm not quite sure how this might transfer to your approach, with your Haskell-inspired style being quite different from our C++ templates, in the PEGTL our equivalent to your Char, which is called one, is variadic (true to the T in PEGTL a variadic template) and takes a list of possible matches.
What are some alternatives?
frozen - a header-only, constexpr alternative to gperf for C++14 users
lexy - C++ parsing DSL
Boost - Super-project for modularized Boost
cpp-peglib - A single file C++ header-only PEG (Parsing Expression Grammars) library
rust - Empowering everyone to build reliable and efficient software.
spirit - Boost.org spirit module
stb - stb single-file public domain libraries for C/C++
C++ B-tree - Git mirror of the official (mercurial) repository of cpp-btree
Allegro - The official Allegro 5 git repository. Pull requests welcome!
pybind11 - Seamless operability between C++11 and Python
Magic Enum C++ - Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
sparsepp - A fast, memory efficient hash map for C++