8 lines
172 B
Rust
8 lines
172 B
Rust
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pure fn is_even(i: int) -> bool { (i%2) == 0 }
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fn even(i: int) : is_even(i) -> int { i }
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fn main() {
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let x: int = 4;
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even(x); //! ERROR unsatisfied precondition
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}
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