Clippy lints / Pedantic
Clippy lint · Pedantic · checked with Clippy 0.1.99
clippy::unnecessary_semicolon: Checks for the presence of a semicolon at the end of a match or if statement evaluating to ()
What it meansChecks for the presence of a semicolon at the end of a match or if statement evaluating to (). It is in the pedantic group and off by default.
Does it matter?
The semicolon is not needed, and may be removed to avoid confusion and visual clutter.
Stricter lints with some false positives. Off by default; opt in with clippy::pedantic.
How to fix it
Clippy can fix this one for you: run cargo clippy --fix (add --allow-dirty if you have uncommitted changes). Review the diff before you commit.
Flagged
if a > 10 {
println!("a is greater than 10");
};
Write this instead
if a > 10 {
println!("a is greater than 10");
}
Turn it off, or on
It is off by default. To use it, set it to warn or deny:
Whole crate (Cargo.toml)
[lints.clippy]
unnecessary_semicolon = "warn"In code
#![warn(clippy::unnecessary_semicolon)]One run
cargo clippy -- -W clippy::unnecessary-semicolonThe [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.
Clippy's own documentation
What it does
Checks for the presence of a semicolon at the end of
a match or if statement evaluating to ().
Why is this bad?
The semicolon is not needed, and may be removed to avoid confusion and visual clutter.
Example
if a > 10 {
println!("a is greater than 10");
};
Use instead:
if a > 10 {
println!("a is greater than 10");
}
From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.
Related lints
- too_many_linesChecks for functions with a large amount of lines
- missing_errors_docChecks the doc comments of publicly visible functions that return a Result type and warns if there is no # Errors section
- must_use_candidateChecks for public functions that have no #[must_use] attribute, but return something not already marked must-use, have no mutable arg and mutate no statics
- unnecessary_debug_formattingChecks for Debug formatting ({:?}) applied to an OsStr or Path. This includes: Format specifiers on format_args!() (width, precision have no effect) Format width too small for the format trait (e.g
- unnecessary_joincalled `.collect::<Vec<String>>().join("")` on an iterator
- unnecessary_literal_boundDetects functions that are written to return &str that could return &'static str but instead return a &'a str
- unnecessary_trailing_commaunnecessary trailing comma
- unnecessary_wrapsthis function's return value is unnecessarily wrapped by `Option`
- unnested_or_patternsunnested or-patterns
All 847 Clippy lints · Rust compiler errors · Cargo.toml checker
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