39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
#![warn(clippy::modulo_one)]
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#![allow(clippy::no_effect, clippy::unnecessary_operation, clippy::identity_op)]
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static STATIC_ONE: usize = 2 - 1;
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static STATIC_NEG_ONE: i64 = 1 - 2;
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fn main() {
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10 % 1;
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//~^ ERROR: any number modulo 1 will be 0
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//~| NOTE: `-D clippy::modulo-one` implied by `-D warnings`
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10 % -1;
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//~^ ERROR: any number modulo -1 will panic/overflow or result in 0
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10 % 2;
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// also caught by rustc
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i32::MIN % (-1);
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//~^ ERROR: this operation will panic at runtime
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//~| NOTE: `#[deny(unconditional_panic)]` on by default
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//~| ERROR: any number modulo -1 will panic/overflow or result in 0
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const ONE: u32 = 1 * 1;
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const NEG_ONE: i64 = 1 - 2;
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const INT_MIN: i64 = i64::MIN;
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2 % ONE;
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//~^ ERROR: any number modulo 1 will be 0
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// NOT caught by lint
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5 % STATIC_ONE;
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2 % NEG_ONE;
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//~^ ERROR: any number modulo -1 will panic/overflow or result in 0
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// NOT caught by lint
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5 % STATIC_NEG_ONE;
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// also caught by rustc
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INT_MIN % NEG_ONE;
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//~^ ERROR: this operation will panic at runtime
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//~| ERROR: any number modulo -1 will panic/overflow or result in 0
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// Not caught by lint, we don't look into static items, even if entirely immutable.
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INT_MIN % STATIC_NEG_ONE;
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}
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