mirror of https://github.com/rust-lang/rust
52 lines
1.5 KiB
Rust
52 lines
1.5 KiB
Rust
// Issue #50124 - Test warning for unused operator expressions
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//@ check-pass
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#![warn(unused_must_use)]
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#![feature(never_type)]
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fn deref_never(x: &!) {
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// Don't lint for uninhabited typess
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*x;
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}
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fn main() {
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let val = 1;
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let val_pointer = &val;
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// Comparison Operators
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val == 1; //~ WARNING unused comparison
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val < 1; //~ WARNING unused comparison
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val <= 1; //~ WARNING unused comparison
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val != 1; //~ WARNING unused comparison
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val >= 1; //~ WARNING unused comparison
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val > 1; //~ WARNING unused comparison
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// Arithmetic Operators
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val + 2; //~ WARNING unused arithmetic operation
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val - 2; //~ WARNING unused arithmetic operation
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val / 2; //~ WARNING unused arithmetic operation
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val * 2; //~ WARNING unused arithmetic operation
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val % 2; //~ WARNING unused arithmetic operation
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// Logical Operators
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true && true; //~ WARNING unused logical operation
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false || true; //~ WARNING unused logical operation
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// Bitwise Operators
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5 ^ val; //~ WARNING unused bitwise operation
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5 & val; //~ WARNING unused bitwise operation
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5 | val; //~ WARNING unused bitwise operation
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5 << val; //~ WARNING unused bitwise operation
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5 >> val; //~ WARNING unused bitwise operation
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// Unary Operators
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!val; //~ WARNING unused unary operation
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-val; //~ WARNING unused unary operation
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*val_pointer; //~ WARNING unused unary operation
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if false {
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deref_never(&panic!());
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}
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}
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