rust/src/test/run-pass/log-knows-the-names-of-variants.rs

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enum foo {
a(uint),
b(str),
c,
}
fn main() {
assert "a(22)" == #fmt["%?", a(22u)];
assert "b(\"hi\")" == #fmt["%?", b("hi")];
assert "c" == #fmt["%?", c];
}