> Le 20 déc. 2015 à 01:37, Colin Barrett via swift-evolution > <[email protected]> a écrit : > > >> On Dec 19, 2015, at 7:32 PM, Amir Michail <[email protected]> wrote: >> >> >>> On Dec 19, 2015, at 7:21 PM, Colin Barrett <[email protected]> >>> wrote: >>> >>> I’d recommend you read >>> http://tratt.net/laurie/blog/entries/the_bootstrapped_compiler_and_the_damage_done, >>> which has a number of rebuttals to what you’ve said below. >>> >> >> That’s an interesting article but it doesn’t address the issue of whether >> compiler code is more like normal programming than compiler standard library >> code. > > Perhaps I don’t understand what you mean, but the article gives two good > reasons why compiler code is special. The first reason is that we understand > a lot about how to design a compiler, much more than we understand about how > to design other types of programs. The second follows: > >> [C]ompilers are an atypical class of program. In essence, a compiler is a >> simple batch pipeline process. A program is read in and translated to a >> tree; a series of tree transformations are applied; and eventually one of >> those trees is saved out as some sort of binary data (e.g. machine code or >> bytecode). Most of the intermediate tree transformations calculate a >> relatively simple bit of information about the program and create a slightly >> modified tree based on it. A few calculations crop up time and time again, >> such as: maps from variables to scopes or types; and stacks to determine >> closures. Significantly, and unlike most programs in the real world, there >> is no interaction with users: the compiler knows all it needs about the >> outside world from the moment it is called. > > Personally, I think the main reason not to rewrite the Swift compiler is that > it would be a distraction from improving the Swift language and other > associated tools. > > -Colin >
An other reason is that is make it harder to port to new platforms. You would have to do all the dev using cross compilation from another platform instead of just working on the target platform directly. Jean-Daniel _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
