Interpreting the D grammar

Jacob Carlborg via Digitalmars-d digitalmars-d at puremagic.com
Thu Aug 6 07:22:37 PDT 2015


On 06/08/15 10:26, MakersF wrote:

> Then your best shot is to approximate the grammar with the regual
> expressions you have access to. You'll get to a point where some
> constructs can not be correctly represented; at that point you should
> probably write a regex which produces what the grammar produces and some
> more.
>
> In the example before of generating paired interleaved parentheses, you
> could generate every possible combination of parentheses, like
> ( (|)|[|]|{|}|" )*
> where only the external parentheses are syntax for the regex. That regex
> matches all the productions of the paired parentheses grammar, and many
> more strings.
>
> At the end of the day you want to highlight correct syntax, and if an
> user writes wrong syntax is OK to have wrong highlight, so be sure your
> regex work for the right syntax, and can do random stuff for the wrong one

I was hoping to enhance the current TextMate grammar for D to get it a 
bit closer to the D grammar [1]. That's why I started this thread.

[1] http://dlang.org/grammar.html

-- 
/Jacob Carlborg


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