Status status = __traits(compilesReportError, {string b=10; }) => status.msg=Error: cannot....

[Timothee Cour]

understood, but that's responsibility of tester to make sure they're
not too flaky (eg using msg.canFind("FOO") (or, if regex weren't slow,
regex)



On Wed, Feb 7, 2018 at 1:13 PM, Nicholas Wilson via Digitalmars-d
<digitalmars-d at puremagic.com> wrote:
> On Wednesday, 7 February 2018 at 20:29:44 UTC, Timothee Cour wrote:
>>
>> is there any way to get error from speculative execution (`__traits(
>> compiles, ...)`)? would be useful in tests; If not currently how hard
>> would that be to implement? eg:
>>
>> ```
>>
>> struct Status{bool ok; string msg;}
>>
>> Status status = __traits(compilesReportError, {string b=10;})
>> assert(!status.ok);
>> assert(status.msg==`main.d(15) Error: cannot implicitly convert
>> expression 10 of type int to string`);
>> ```
>
>
> Probably not very hard. Would make for some nice diagnostics,but very flakey
> tests. Compiler errors are frequently changed.