simpledisplay getting dynamic loads, terminal gui gracefully degrades, i muse on scope raii classes
Posted 2020-06-29
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Articles- String interpolation DIP prototype
- terminal inline syntax highlighting, sdpy fonts improved
- January 18, 2021
- gdb debugging tips
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- New plain tcp fiber socket class (with "how it works" docs), new arsd docs started, new dub subpackages in arsd. Also Turkish newsgroups added to forum.dlang.org
- Little audio player in D
- Thoughts on tutorial writing benefits, D marketing, and some simpledisplay.d improvements.
- arsd 9.0 rollup release, my thoughts on "google it" culture and related practices
- dpldocs.info cross-package search finally released! and more terminal getline enhancements
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- New selective mouse input in terminal stack, Xft used in simpledisplay to improve TrueType font support
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- October 26, 2020
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- Off topic jrpg video game review
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- simpledisplay getting dynamic loads, terminal gui gracefully degrades, i muse on scope raii classes
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- i want to make a jrpg, and have eye damage.
- Dustmite post on official blog
- What if I were dictator?
- March 30, 2020
- terminal.d with built-in emulator option releaed
- Online DConf in the works
- Dconf 2020 cancelled, Adam plays with terminal gui integration
- March 2, 2020
- some adrdox/dpldocsinfo updates
- terminal.d gets clipboard functions, ldc 1.20 out.
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- February 3, 2020
- Adam's terminal suite explained
- Understanding mixin templates, terminal.d improvements
- My attribute-by-default proposal. Also dmd 2.090 came out.
- DConf 2020 announced: June 17-20 in London. @safe by default debated. Adam did: Android, JNI, WebSocket in arsd libs
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- LDC 1.19 - Android, AVR. My rant on tests, update on JNI and COM.
- Walter's string interpolation proposal is OK but not great. My Android thing nearing beta release. dub downtime explained.
- Android project update, introduction to arsd.jni
- New pattern about interface contracts
- Adam shares Windows console secrets - DO NOT USE chcp!!
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- Socket tutorial
- November 4, 2019
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- Adam does iOS "goodbye world"
- September 30, 2019
- D turns 20, Adam rants on software freedom
- Named arg DIPs and my thoughts on code organization
- September 9, 2019
- I wrote about mixin templates vs string mixins on Stack Overflow
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- Bug bounty in D again - my hot take, on reusing code, a fun picture, my tentative plan for the next month
- Time invested is worth a lot
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- July 29, 2019
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- Solving vs managing problems
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- CRTP thoughts, named arguments DIP review, DConf videos now on youtube
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- a little more webassembly
- May 20, 2019
- Adam's string interpolation proposal
- DMD 2.086 live, GCC 9 with D support formally released, DConf coming soon, links to posts on builder pattern and disallowing implicit conversions with templates, and 2d array op overloads
- template constraint error improvements coming?
- dmd 2.086 beta, dstep 1.0 released, Adam works on memory usage
- obj-c and webassembly report, tips on is expressions linked.
- new ldc, new dmd, dpp on the blog
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- March 18, 2019
- LDC 1.15.0-beta1, responsive design rant
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- Obj-C interop and D without druntime code to copy/paste
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- January 28, 2019
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- dmd obj-c growing, Adam static foreaches an interface to RPC
- dmd 2.084, hope for future, but busy non-D week for me
- IDE tools released, my cgi.d gets new features
- DConf announced, tip, Adam rants: mouse trap
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What Adam is working on
Continuing with last week's dynamic load thing, I converted simpledisplay.d to dynamic load its dependencies (not yet formally released) and then adjusted terminal.d's newish embedded emulator to check the flag and fallback to normal terminal if the gui is impossible.
The implementation uses static constructors to load, but if the library is not there, it sets all the library pointers to the C abort function and sets a __gshared bool flag that can be checked later. If your program checks that flag, you can avoid all the other functions, and if not, you get the runtime error (and the XDisplayConnection.get method will throw instead of abort, similar to if X was simply not available, so you should be expecting that to potentially fail anyway).
The benefit here is you can write a single binary that uses gui if needed and doesn't if not; no additional build time or load time needs. A script language, for example, using simpledisplay in its library, can still run on a server without X installed, yet use the gui when running elsewhere.
Adam's musing
RAII classes in D (aka scoped!) are actually pretty easy to use, but one of the difficulties is managing the reference - in order to implicitly cast to any interfaces, you need to alias this to the inner reference. Then any information in the type system about ownership is lost; since classes are typically GC'd in D, most user functions are liable to assume they are allowed to hold to it.
Well, the new DIP 25 stuff coming through, the return ref thing, might acutally help with that. I kinda wanna give it a try and see how it goes.