Wishlist: caching source code

[timholy]

Several of us would like it if Julia maintained a source-text cache for all code, in addition to the current cache for lowered/inferred/compiled code. (See #22721, with "votes" from developers of Revise, Gallium, and a tracing package.) I'm putting a 1.0 milestone on the decision, but I'm afraid I lack the time to work on the implementation of this feature. Feel free to remove this from the milestones as appropriate.

[stevengj]

See also #2625.

[StefanKarpinski]

I also want this, but it's definitely not 1.0-blocking since we can always add this functionality in 1.x.

[lobingera]

Maybe i'm looking into the wrong direction, but isn't a reference of filename/path/linenumber from-to enough?

[Keno]

The underlying file might have been modified since parsing.

[timholy]

but it's definitely not 1.0-blocking since we can always add this functionality in 1.x.

Good point, I moved the milestone to 1.x.

[davidanthoff]

Just do add another +1 for this, it would allow me to greatly simplify Query.jl in one key part.