7d08678b74
The syntax is
alt x {
mypat where mycond { ... }
}
The condition may refer to any of the variables bound by the pattern.
When a guard fails, pattern-matching continues with the next pattern.
Closes #857
16 lines
307 B
Rust
16 lines
307 B
Rust
fn main() {
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let a = alt 10 {
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x when x < 7 { 1 }
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x when x < 11 { 2 }
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10 { 3 }
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_ { 4 }
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};
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assert a == 2;
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let b = alt {x: 10, y: 20} {
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x when x.x < 5 && x.y < 5 { 1 }
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{x, y} when x == 10 && y == 20 { 2 }
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{x, y} { 3 }
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};
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assert b == 2;
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}
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