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Compiler

As explained in Code Like a Pro in Rust

rustc is the official Rust compiler that translates Rust source code into executable or library artifacts and reports compile-time errors.

rustc is the official Rust compiler. It compiles Rust source into platform-dependent binaries, including targets such as x86-64, AArch64, and WebAssembly. Distribution therefore usually means shipping a binary rather than source alone. section 1.1

Built on LLVM, rustc sits alongside Cargo and everyday tooling such as rust-analyzer, rustfmt, Clippy, and sccache. Rust’s static type checks and borrow checker reject mismatched types and invalid references before code runs. section 3.0 section 6.4

Let the compiler handle compile-time guarantees

Do not write a unit test to establish that an integer is an integer or that a reference is valid. Test program logic instead, including fallible conversions and edge cases. Heavy use of Option, unwrap(), or unsafe code can make those bugs harder to find. section 6.4

How Code Like a Pro in Rust covers it

How deep it goes
Identifies rustc and its LLVM foundation, then explains type and reference checks without detailing compiler internals.
Examples
Contrasts strings with integers and compiler-checked references with logic that needs tests.
What you can do after
Evaluate/understand which checks the compiler already provides and where to focus unit tests.
How it connects
Connects rustc to LLVM, Cargo, the borrow checker, static typing, and unit testing.
Cover of Code Like a Pro in Rust
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