Cargo check
cargo check is a Cargo subcommand that checks a Rust package for compilation errors without producing final executable artifacts.
Learn Rust in a Month of Lunches
cargo check is a Cargo command that analyzes a Rust package for compilation errors without producing a runnable executable.
- How it is used
- Checks a Rust package during active coding to learn whether it compiles without building the program.
- How deep it goes
- Defines the command and contrasts its faster, non-building check with compilation, but does not explain its internal analysis.
- Examples
- Uses cargo check during coding and contrasts it with cargo run and cargo build --release.
- What you can do after
- Diagnose compilation readiness during development by running cargo check before testing with cargo run.
Read how Learn Rust in a Month of Lunches explains cargo check →
Write Powerful Rust Macros
cargo check is a Cargo command that compiles a Rust project for error checking without producing a final executable.
- How it is used
- Uses compilation checks to catch Rust errors in macro libraries and generated code through a consuming application.
- How deep it goes
- Explains the boundary between library and generated-code checking, but defers full generated-code inspection to cargo expand.
- Examples
- Uses a misspelled TokenStream type, invalid quote! output, and a missing return in a Result-producing macro.
- What you can do after
- Diagnose macro errors by checking both the library and consuming application, then inspect expanded output with cargo expand.
Related concepts
- Cargopart of · Cargo is Rust’s package manager and build system for managing projects, dependencies, compilation, testing, and related workflows.
- compileruses · A compiler is software that translates source code into executable code or another representation, while analyzing it according to the source language’s rules.
- cargo buildcontrasts with · cargo build is a Cargo subcommand that resolves dependencies, compiles a Rust package, and produces its build artifacts without executing them.
- code generationcontrasts with · Code generation is the production of program code by transforming inputs such as specifications, models, templates, or existing representations.
- cargo-expandcontrasts with · cargo-expand is a Cargo subcommand that displays the source code generated by expanding Rust macros.
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