cargo:tldr:123c7

The command "cargo +nightly build" is used to build a Rust project using the nightly version of the Rust compiler.

In the Rust ecosystem, there are three release channels available: stable, beta, and nightly. The stable channel contains the most recent stable version of the language, which is recommended for most projects due to its stability and compatibility guarantees. The beta channel contains a pre-release version of the next stable release, allowing developers to test upcoming features and provide feedback. The nightly channel provides access to the latest features, improvements, and experimental language changes, but it may be less stable compared to the other channels.

When executing the command "cargo +nightly build," the "+" symbol tells Cargo (the Rust package manager) to use the nightly version of the Rust compiler. The "build" keyword instructs Cargo to compile the project's source code and produce the executable or library specified in the project's configuration file (Cargo.toml). This command pulls the necessary dependencies, compiles the code, and generates the final output artifacts required to run the program.

Using the nightly version can be useful if you want to experiment with new language features or if your project relies on specific functionality only available in the nightly channel. However, be aware that using the nightly compiler can lead to compatibility issues, as some code or libraries may not work correctly with the latest changes.