DIP 1027---String Interpolation---Community Review Round 1

[Bastiaan Veelo]

On Wednesday, 11 December 2019 at 22:49:01 UTC, Steven 
Schveighoffer wrote:
> On 12/11/19 5:37 PM, H. S. Teoh wrote:
[…]
>> 	i"$abc"		== tuple("%s", abc);
>> 	i"$({%d}abc)"	== tuple("%d", abc);
>> 	i"$({?}abc)"	== tuple("?", abc);
>> 
>> For convenient interop with printf/writefln, we can still 
>> default to
>> "%s" as the default placeholder, but the {} syntax now no 
>> longer assumes
>> printf syntax, making i"" literals MUCH more useful in many 
>> more places
>> outside the purvey of printf/writefln.
>> 
>> So you'd do SQL strings like this:
>> 
>> 	string name;
>> 	int serial;
>> 	float cost;
>> 	db.exec(i"INSERT INTO mytable VALUES (${?}name, ${?}serial, 
>> ${?}cost)");
>> 
>> which translates the last line to:
>> 
>> 	db.exec("INSERT INTO mytable VALUES (?, ?, ?)", name, serial, 
>> cost);
>> 
>> without the need for any intermediate format string parser.
>
> OK, this is definitely a winner, way better than my idea. Only 
> thing better would be some way to set the default specifier to 
> avoid all the verbosity.
>
> Please make this part of the DIP Walter!

Isn’t 
https://forum.dlang.org/post/vxzqttydlvzngrwrvipa@forum.dlang.org 
better still? Streamlining template mixins could pay off in many 
more places, and is truly extendable and customisable.

Bastiaan