23 lines
465 B
Rust
23 lines
465 B
Rust
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iface to_str {
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fn to_str() -> str;
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}
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impl of to_str for int {
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fn to_str() -> str { int::str(self) }
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}
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impl <T: to_str> of to_str for [T] {
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fn to_str() -> str {
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"[" + str::connect(vec::map(self, {|e| e.to_str()}), ", ") + "]"
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}
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}
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fn main() {
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fn indirect<T: to_str>(x: T) -> str {
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x.to_str() + "!"
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}
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assert 1.to_str() == "1";
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assert [2, 3, 4].to_str() == "[2, 3, 4]";
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assert indirect([10, 20]) == "[10, 20]!";
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}
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