mirror of
https://github.com/HenkKalkwater/aoc-2020
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25 lines
622 B
D
25 lines
622 B
D
import std.conv;
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import std.exception;
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import std.format;
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class ArgumentException : Exception{
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mixin basicExceptionCtors;
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}
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/**
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* Helper function for implementing
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*
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* Looks at the first argument string, and calls the delegate dgs[i + 1], while making sure nothing
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goes out bounds.
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*
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* Params:
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* part = The part to run.
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* dgs = list of delegates. Which one will be called depends on args[0]
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*/
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R parts(R)(int part, R delegate()[] dgs ...) {
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ulong len = dgs.length;
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enforce!ArgumentException(part > 0 && part <= len, "This day supports parts %d to %d".format(1, len));
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return dgs[part - 1]();
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}
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