_aaRange cannot be interpreted at compile time, because it has no available source code

[dlangBugzillaToGithub]

Jeremy Baxter reported this on 2024-07-12T04:54:14Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=24658

Description

Associative arrays cannot be iterated over at compile time. This is because the implementation of the range interface for AAs is private.

    enum range = ["a": "b"].byKey();

    void main()
    {
    }

This code fails on DMD 2.108.0 with:

    object.d(3130): Error: `_aaRange` cannot be interpreted at compile time, because it has no available source code