30 lines
852 B
Rust
Executable File
30 lines
852 B
Rust
Executable File
#![feature(plugin)]
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#![plugin(clippy)]
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const ONE : i64 = 1;
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const NEG_ONE : i64 = -1;
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const ZERO : i64 = 0;
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#[deny(identity_op)]
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fn main() {
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let x = 0;
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x + 0; //~ERROR the operation is ineffective
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x + (1 - 1); //~ERROR the operation is ineffective
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x + 1;
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0 + x; //~ERROR the operation is ineffective
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1 + x;
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x - ZERO; //no error, as we skip lookups (for now)
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x | (0); //~ERROR the operation is ineffective
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((ZERO)) | x; //no error, as we skip lookups (for now)
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x * 1; //~ERROR the operation is ineffective
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1 * x; //~ERROR the operation is ineffective
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x / ONE; //no error, as we skip lookups (for now)
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x / 2; //no false positive
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x & NEG_ONE; //no error, as we skip lookups (for now)
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-1 & x; //~ERROR the operation is ineffective
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}
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