Generic memory allocation in D

[kdevel]

On Tuesday, 5 March 2024 at 03:31:28 UTC, Walter Bright wrote:
> On 3/4/2024 2:57 PM, kdevel wrote:
>> And yesterday I found a post where an "is" function does not 
>> return
>> a bool [2]:
>> 
>> https://github.com/dlang/dmd/pull/16280/files
>> package CppOperator isCppOperator(const scope Identifier id)
>
> Correct, but it isn't that bad. The "is", when treated as a 
> bool, gives a result that correctly answers the question.

Sure, but on the one hand that function is nowhere used as a 
predicate. These are the only two invocations I found (in dmd 
2.105.3):

cppmangle.d:

    1216         // test for special symbols
    1217         CppOperator whichOp = isCppOperator(ti.name);
    1218         final switch (whichOp)

cppmanglewin.d:

    1164     auto whichOp = isCppOperator(ti.name);
    1165     final switch (whichOp)

whichOp is not used in boolean context either.

On the other hand after your rewrite of isCppOperator there are
different values which map to false:

old: enum CppOperator { Cast, Assign, Eq, Index, Call, Unary, 
Binary, OpAssign, Unknown }
new: enum CppOperator { Unknown, Cast, Assign, Eq, Index, Call, 
Unary, Binary, OpAssign }