Re: Why are enums with base type string not considered strings?
On Sunday, 14 March 2021 at 16:30:47 UTC, Bastiaan Veelo wrote: On Sunday, 14 March 2021 at 16:09:39 UTC, Imperatorn wrote: On Sunday, 14 March 2021 at 10:42:17 UTC, wolframw wrote: [...] May be a regression? https://issues.dlang.org/show_bug.cgi?id=16573 Indeed: https://run.dlang.io/is/liSDBZ It regressed in 2.079.1. Seems to be worth an issue report. —Bastiaan. Thanks for the advice. I've since had a deeper look into this located the PR that changed this behavior [1]. It seems this change was very much deliberate. In the PR, Jonathan also makes some points that are very hard to disagree with. So, perhaps the better solution would be to make isBoolean and isSomeChar (and perhaps other functions that I didn't think of) return false for enums? As a side note, isSomeChar returning true for enums is also what causes the behavior demonstrated in Issue 21639 [2]. [1] https://github.com/dlang/phobos/pull/5291 [2] https://issues.dlang.org/show_bug.cgi?id=21639
Re: Why are enums with base type string not considered strings?
On Sunday, 14 March 2021 at 16:09:39 UTC, Imperatorn wrote:
On Sunday, 14 March 2021 at 10:42:17 UTC, wolframw wrote:
enum BoolEnum : bool { TestBool = false }
enum CharEnum : char { TestChar = 'A' }
enum StringEnum : string { TestString = "Hello" }
pragma(msg, isBoolean!BoolEnum); // true
pragma(msg, isSomeChar!CharEnum); // true
pragma(msg, isSomeString!StringEnum); // false
Why does isSomeString not return true for an enum with base
type string
May be a regression?
https://issues.dlang.org/show_bug.cgi?id=16573
Indeed: https://run.dlang.io/is/liSDBZ
It regressed in 2.079.1. Seems to be worth an issue report.
—Bastiaan.
Re: Why are enums with base type string not considered strings?
On Sunday, 14 March 2021 at 10:42:17 UTC, wolframw wrote:
enum BoolEnum : bool { TestBool = false }
enum CharEnum : char { TestChar = 'A' }
enum StringEnum : string { TestString = "Hello" }
pragma(msg, isBoolean!BoolEnum); // true
pragma(msg, isSomeChar!CharEnum); // true
pragma(msg, isSomeString!StringEnum); // false
Why does isSomeString not return true for an enum with base
type string while
other isX functions return true for enums with an according
base type X?
Regarding whether enums should be considered by these
functions, I can see the
case being made one of both ways (personally, I'd say they
should), but in the
example above it seems that different rules are applied.
May be a regression?
https://issues.dlang.org/show_bug.cgi?id=16573
