Failed to set default value with utcDateTime.fromISO("2024-02-15T18:36:03Z")

[skywing918]

Describe the bug

throw: error @typespec/openapi3/invalid-default Invalid type 'ScalarValue' for a default value :1:1

import "@typespec/http";
import "@typespec/openapi3";
using Http;
using TypeSpec.OpenAPI;
@service
namespace test;

scalar utcDateTime {
  init fromISO(value: string);
}

model DateRange {
  minDate: utcDateTime = utcDateTime.fromISO("2024-02-15T18:36:03Z");
}

Reproduction

Playground

Checklist

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• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[timotheeguerin]

Not sure I would qualify that one as a bug as much as a missing feature. Default values have always only supported primitive types.