Proposal: Database Engine for D

[Jacob Carlborg via Digitalmars-d]

On 2016-01-04 01:49, Andrei Alexandrescu wrote:

> Second, ET as a mechanism for SQL interface has other inherent
> limitations. Consider the "LIKE" operator in SQL, which has no ET
> equivalent in C++ with similar syntax, and no direct equivalent in LINQ.
> That doesn't mean the respective languages are broken.

It's one operator that doesn't have a direct corresponding in the host 
language. With D, it's not possible to handle most of the operators.

> Third, evaluating the merits and demerits of a language choice should be
> done within several appropriate use cases, not just one. For example,
> D's use of opEquals/opCmp saves a lot of boilerplate and potential bugs
> in many cases compared to C++.

If D allowed to separately overload the comparison operators the 
standard library should of course provide a mixin of some kind to reduce 
the boilerplate.

> On another example, C++'s overloading of
> &&, ||, and the comma operator are considered downright disastrous and
> are unrecommended by virtually all coding standards and guidelines, yet
> do work with ETs.

I think for generating SQL, overloading && and || would be a valid use case.

There's of course AST macros as well, which have many other good use 
cases. Unfortunately you don't like those either :(

-- 
/Jacob Carlborg