frozen
json
frozen | json | |
---|---|---|
10 | 93 | |
1,210 | 40,332 | |
- | - | |
6.1 | 7.7 | |
about 1 month ago | 1 day ago | |
C++ | C++ | |
Apache License 2.0 | MIT License |
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frozen
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Making a "constant mapping"
I found this extension that implements "frozen" versions of some C++ containers, but I was wondering if there is a good solution available in the standard library.
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Static map - is it possible?
A library exists that can produce constexpr hash table based containers.
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What C++ library do you wish existed but hasn’t been created yet?
I use the Frozen library for that. Since the conversions should be known at compile time you can make constexpr hash tables for lookups.
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Command-line util for class implementation (My first try at a professional c++ application)
The constexpr dependency of note here is frozen.
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Ambition is cute.
In C++, a drop-in replacement for your DSA can provide significant improvements over the standard library. Particularly the standard unordered_map class can be improved by 50% to 100% (e.g. https://github.com/greg7mdp/parallel-hashmap, or for static maps https://github.com/serge-sans-paille/frozen). Of course, recognize that creating a DS/A from scratch is an entire project, and you shouldn't roll your own for an independent codebase.
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[Hobby] Bomberman fan 2D Animator needed
Technologies (for curious folks): C++17, SFML, Entt, Frozen, Protobuf, spdlog, GoogleTest, GoogleBenchmark, CMake and Dear ImGui for debug purpose.
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May 2021 monthly "What are you working on?" thread
In the language, I added anonymous array literals. I did some cleanup in the compiler and updated to LLVM 12 from 10 (which was pretty trivial, surprisingly). I also added frozen, a C++ perfect-hashing library, as a dependency to speed up the lookup of keywords in my lexer. The library exploits C++’s constexpr features to generate a perfect hash at compile-time without any separate build step, which is great, and it also provides a drop-in replacement for std::unordered_map that uses the hash.
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MSVC Backend Updates in Visual Studio 2019 version 16.10 Preview 2 | C++ Team Blog
This is where I plug Frozen :-] https://github.com/serge-sans-paille/frozen
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What (relatively) easily to implement features would you like to see in c++23.
I’ve no idea how hard it is to implement, but return type polymorphism would be nice. Especially returning different things based on the constexpress of the result. And then add Frozen eqivalents of associative containers to the STL, so that, for example constexpr auto set = std::make_set(...) would be frozen::set, and auto set = std::make_set(...) would be std::set.
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Compile-time INI config parsing and accessing with C++20
In which case, I believe the answer your question would be yes: the frozen map.
json
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Learn Modern C++
I have not done a "desktop" program in 25+ years and never using C++ (or C), since then I'm mostly a web developer (PHP,Elixir, JS, Kotlin etc).
I'm currently doing a C++ audio plugin with the Juce framework.
This website has been a good resource, alongside https://www.learncpp.com
But I was actually close to give up before using those two things:
- https://github.com/nlohmann/json : my plugin use a json api backend and the Juce json implementation is atrocious (apparently because of being born in previous c++ version), but this library is GREAT.
- ChatGPT 4. I'm not sure I would have "succeeded" without it, at least not in a reasonable time frame. ChatGPT 3.5 is slow and does not give good results for my use case but 4 is impressive. And I use in a very dumb way, just posing question in the web UI. I probably could have it directly in MSVC?
Also I must say, for all its flaws, I have a renewed appreciation for doing UI on the web ;)
- JSON for Modern C++ 3.11.3 (first release since 473 days)
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What C++ library do you wish existed but hasn’t been created yet?
https://github.com/nlohmann/json works well for me
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[CMake] Can't include external header in .h file
cmake_minimum_required(VERSION 3.15) project(xrpc++ DESCRIPTION "C++ AT Protocol XRPC library" VERSION 1.0.0 LANGUAGES CXX) include(FetchContent) FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git GIT_TAG 2553fc41450301cd09a9271c8d2c3e0cf3546b73) # The commit hash for 1.10.x. Replace with the latest from: https://github.com/libcpr/cpr/releases FetchContent_MakeAvailable(cpr) FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.2/json.tar.xz) FetchContent_MakeAvailable(json) add_library(${PROJECT_NAME} SHARED src/lexicon.cpp src/xrpc.cpp ) target_link_libraries(${PROJECT_NAME} PRIVATE cpr::cpr) target_link_libraries(${PROJECT_NAME} PRIVATE nlohmann_json::nlohmann_json) set_target_properties(${PROJECT_NAME} PROPERTIES VERSION ${PROJECT_VERSION}) set_target_properties(${PROJECT_NAME} PROPERTIES SOVERSION 1) target_include_directories(${PROJECT_NAME} PUBLIC include) set(CMAKE_BUILD_TYPE debug)
FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.2/json.tar.xz) FetchContent_MakeAvailable(json)
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It is either a clever technique or a sad failure
Here is one popular C++ library (nlohmann/json) removing its use.
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How to compile project to separate files to prevent having single large executable as a result?
Before going into binary serialization I suggest you to get comfortable with serialization to text. You can try to write your data to text files and read them in again. Then after you get an idea of how this works you can try to use a library that writes to XML or json, e.g. nlohmann json
- What are some ways I can serialize objects?
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C++ that allows tracking peer to peer multimedia streaming connections using a Flat File - NOT MySql
Download the single header file json.hpp from https://github.com/nlohmann/json/releases and place it in your project directory or an include directory.
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C++ Reflection for Component Serialization and Inspection
Exemple of a JSON library: https://github.com/nlohmann/json (For XML, there's tinyxml)
What are some alternatives?
gram_grep - Search text using a grammar, lexer, or straight regex. Chain searches for greater refinement.
RapidJSON - A fast JSON parser/generator for C++ with both SAX/DOM style API
parallel-hashmap - A family of header-only, very fast and memory-friendly hashmap and btree containers.
JsonCpp - A C++ library for interacting with JSON.
STL - MSVC's implementation of the C++ Standard Library.
ArduinoJson - 📟 JSON library for Arduino and embedded C++. Simple and efficient.
bluebird - A work-in-progess programming language modeled after Ada and C++
Boost.PropertyTree - Boost.org property_tree module
mpv - 🎥 Command line video player
yaml-cpp - A YAML parser and emitter in C++
c3c - Compiler for the C3 language
cJSON - Ultralightweight JSON parser in ANSI C