`std.stdio.readf` now accepts `ref` parameters as input arguments.

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import std.stdio : readf;
void main() {
    // assume every line from stdin is similar to "1 2 3";
    int a, b, c;
    readf(" %d %d %d", a, b, c);
    // pointers can still be used
    readf(" %d %d %d, &a, &b, &c);
    // and even combined:
    readf(" %d %d %d, a, &b, c);
}
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