I have yet to dig into the Perl 6 features that make this possible, but having a low-barrier-to-entry way to create DSLs that are compile-time checked and usabl

I have yet to dig into the Perl 6 features that make this possible, but having a low-barrier-to-entry way to create DSLs that are compile-time checked and usable opens the door to something big. I agree but am also going to say-- I'll believe it when I see it. The article was very light on details. What they're claiming is already facilitated by libraries in many existing languages (including Perl 5) Generally, the barrier to entry for designing and implementing your own language is not the difficulty of understanding how lex and yacc work, it's the need for a thorough and precise understanding of the DSL and every step of the compilation process. Error checking, for example... It's understanding what the compiler knows about your program, and what you can do to figure out things about the program, and how expensive that figuring is going to be. The details here are going to be different for every DSL.