Re: How to hide a function return type in order to wrap several functions into an associated array?

[tastyminerals via Digitalmars-d-learn]

On Sunday, 27 September 2020 at 20:03:21 UTC, Paul Backus wrote:

On Sunday, 27 September 2020 at 18:54:11 UTC, tastyminerals wrote:

[...]

You can use an Algebraic [1] or SumType [2] for this:

alias Feature = SumType!(ulong, double, bool);

Feature numberOfPunctChars(string text)
{
    // ...
    return Feature(cnt);
}

Feature ratioOfDigitsToChars(string text)
{
    // ...
    return Feature(ratio);
}

Feature hasUnbalancedParens(string text)
{
    // ...
    return Feature(!isBalanced);
}

[1] http://dpldocs.info/experimental-docs/std.variant.Algebraic.html

[2] https://code.dlang.org/packages/sumtype

Nice, thanks. Never used it, shall take a look.