[jcelerier]

> But contrary to this Fortran code, in order to understand my code, you first have to learn this library

Do you ? I've used Eigen and boost a lot of times and didn't ever need to "learn how the sausage is made", just looking at examples is enough to get stuff to work.

[ktpsns]

Whether you look up examples or a reference documentation does not change the fact that ontop of a given language, you learn new concepts of a library.

In contrast, domain specific languages have exclusive support for certain data types built right into the heart. There is a need for that.

[jcelerier]

I don't really understand the difference between reading three pages of documentation on a language website or two pages on a language website and one page on a library website.