Hello, I'm new to D.

Title is self described, is it possible to use keyword as struct field?

Maybe it is XYproblem, so here I will describe a little what I need.
I'm parsing some json currently with mir-ion (better/simpler suggestions for only json de/serialization?), that has "version" as one of it's keys, so I can't use that as field in my struct. Maybe some annotation in mir library to parse "version" into other struct field name, can't find though (its docs pretty concise).

On Sunday, 20 February 2022 at 11:08:55 UTC, partypooper wrote:

I have a library solution based on opDispatch + __traits(getMember):

/**
 * Mixin template allowing to use a field as if its identifier is a D keyword.
 * Note that this only works with `__traits(getMember)`.
 * Params:
 *      keywordFieldPairs = An array of keyword and field pairs.
 */
template FieldOfKeyword(string[2][] keywordFieldPairs)
{
    template opDispatch(string member)
    {
        static foreach (pair; keywordFieldPairs)
            static if (member == pair[0])
                mixin("alias opDispatch = ", pair[1], ";" );
    }
}
///
unittest
{
    struct Foo
    {
        mixin FieldOfKeyword!([["scope", "scope_"],["class", "class_"]]);
        string scope_;
        string class_;
    }

    Foo foo;
    __traits(getMember, foo, "scope") = "The Universe";
    assert(__traits(getMember, foo, "scope") == "The Universe");
    __traits(getMember, foo, "class") = "Atom";
    assert(__traits(getMember, foo, "class") == "Atom");
}

never used it TBH.

On Sunday, 20 February 2022 at 14:00:45 UTC, Basile B. wrote:

Thank you, didn't know about opDispatch, so you have taught me something new today.
But seems for my current need it can't be apllied (or I still don't understand how to).
Anyway I have found in the mir-ion docs examples that it has @serdeKeys and @serdeKeyOut annotations that can do exactly what I need, bad part it is hard to find them or any documentation about them.

On Sunday, 20 February 2022 at 11:08:55 UTC, partypooper wrote:

Unfortunately I'm not able to help you with mir-ion. But I see two questions here:

I believe this is the case for the most languages - keyword is not allowed as a variable name.

IMO having version keyword in D is unexpected language design. No one will complain about keywords that are widely used in the industry (like struct, int etc). But version?! I hit this problem multiple times already and the only solution for me was to use version_ instead.

On Sunday, 20 February 2022 at 15:33:17 UTC, Andrey Zherikov wrote:

Yes, but as example in Nim you can surround identifier with backticks to omit this issue.