Interpolated strings

[Jacob Carlborg via Digitalmars-d]

On 2017-04-18 10:50, Walter Bright wrote:

> It may not be necessary to have any dependencies on any import.
>
>     $"{a} times 3 is {a*3}"
>
> could be rewritten by the parser to:
>
>     "%s times 3 is %s", a, a * 3
>
> and that is that. (I.e. just an AST rewrite.) It would be quite a bit
> simpler than Jonas' proposed implementation.

Then you would be forced to wrap it in a function call, to "format" or 
similar. The example of using "writeln" is not the best, a more useful 
example is when not printing the string immediately. For example:

auto s = $"{a} times 3 is {a*3}";

With your example that would need to be written as:

import std.format;
auto s = format($"{a} times 3 is {a*3}");

-- 
/Jacob Carlborg