b41e939cb5
Reserve guarded string literals (RFC 3593) Implementation for RFC 3593, including: - lexer / parser changes - diagnostics - migration lint - tests We reserve `#"`, `##"`, `###"`, `####`, and any other string of four or more repeated `#`. This avoids infinite lookahead in the lexer, though we still use infinite lookahead in the parser to provide better forward compatibility diagnostics. This PR does not implement any special lexing of the string internals: - strings preceded by one or more `#` are denied - regardless of the number of trailing `#` - string contents are lexed as if it was just a bare `"string"` Tracking issue: #123735 RFC: rust-lang/rfcs#3593 |
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This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.
Why Rust?
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Performance: Fast and memory-efficient, suitable for critical services, embedded devices, and easily integrate with other languages.
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Reliability: Our rich type system and ownership model ensure memory and thread safety, reducing bugs at compile-time.
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Productivity: Comprehensive documentation, a compiler committed to providing great diagnostics, and advanced tooling including package manager and build tool (Cargo), auto-formatter (rustfmt), linter (Clippy) and editor support (rust-analyzer).
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Read "Installation" from The Book.
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