On Saturday, 21 October 2023 at 12:38:52 UTC, Commander Zot wrote:

Interpolated strings, even if they look like it, are NOT strings. They are a obfuscated or better said, conveniently laid out source code.

They contain inside of them, between the {} program code even if it is just a variable name. Strings are strictly just data. Interpolated string is a mix of CODE and data.

By the very nature of what interpolated strings are it is not possible to treat them as strings.

On Saturday, 21 October 2023 at 15:59:06 UTC, duckchess wrote:

https://github.com/adamdruppe/interpolation-examples/blob/master/01-basics.d

I'll add more examples to that repo as I have time, but this implementation allows libraries to do whatever methods they want.

On Saturday, 21 October 2023 at 18:14:55 UTC, Patrick Schluter wrote:

In C# an interpolated string is just a string

On Saturday, 21 October 2023 at 18:31:10 UTC, Imperatorn wrote:

This isn't true. It is an object that can convert to string (similar to D's alias toString this;)

On Saturday, 21 October 2023 at 18:59:13 UTC, Adam D Ruppe wrote:

Yes, but it's implied is what I meant

On Saturday, 21 October 2023 at 19:07:07 UTC, Imperatorn wrote:

ie

		string name = "Johan";
		int age = 37;
		string s = $"Hello {name}, you are {age} years old";
		
		Console.WriteLine(s);

Would output Hello Johan, you are 37 years old.

On Saturday, 21 October 2023 at 18:25:22 UTC, Adam D Ruppe wrote:

I understand your proposal, and YADIP is better than DIP1037 imho. but it's adding a special case to the compiler and makes string result = i"$name! See that DIP $dipNumber is easy to convert to string.".text; marginally better to write than what we can do today to have the exact same outcome string result = mixin(i!"$name! See that DIP $dipNumber is easy to convert to string."); where i would be a mixin template capturing the surrounding variables and returning an interpolated string.

if we just lower ___"" into mixin(___!""), we can write

import std.sinterp : i;
string s = i"$name! See that DIP $dipNumber is easy to convert to string.";

or

import std.sqlinterp : sql;
sqlstring s = sql"$name! See that DIP $dipNumber is easy to convert to string.";

and if there's no matching template, then we get a normal "i not found, did you forget to include std.sinterp?" error message.

there would be no need for the compiler to even know what string interpolation is. we'd have 'mixin strings'™.

On Saturday, 21 October 2023 at 18:25:22 UTC, Adam D Ruppe wrote:

here's a better example of what i suggest:

https://run.dlang.io/is/n121Ph

On Saturday, 21 October 2023 at 20:58:44 UTC, duckchess wrote:

Agreed. We need a better/simpler way to get the string from the expression without special syntax.

Like basically all other languages