UDA + Pegged AST Hack

[Daniel N]

On Wednesday, 28 November 2012 at 22:04:14 UTC, Philippe Sigaud 
wrote:
> I don't understand what you're trying to do. Could you please 
> explain it a
> bit more? UDA's a quite new and I'd be very interested in their 
> interaction
> with compile-time code manipulation.

I'm trying to find a safe spot in the middle of a file, where I 
can start parsing, normally you have to parse the entire file to 
understand it, ex with your grammar files, there are many 
keywords inside huge strings, so basically I let the compiler 
handle comments and white-space parsing, which allows to me to 
make a stable localized parser for a subset of the language.

> What I don't get is how the [__LINE__] part in magic contains 
> significant
> info.

It allows me to retrieve the entire original source for a 
declaration... it kinda emulates a ".sourceof" trait / property. 
:)