I have some misunderstandings with the del editor. (this is long, sorry)
$ apl
⍝ define a function
∇asd
[1] 10
[2] 20
[3] ∇
⍝ try it
asd
10
20
⍝ change the first line
∇asd[1]123∇
[2] ∇
⍝ huh? wanted to change line 1, but got line 2.
⍝ it also didn't exit the editor
⍝ so run it
asd
20
⍝ huh? what happened to line 1
⍝ list it
∇asd[⎕]∇
∇
[0] asd
[1]
[2] 20
∇
⍝ line 1 got wiped clean
⍝ change it again
∇asd[1]123∇
[2] [1]123∇
⍝ correct the line number, enter new value, exit the editor
⍝ and now it's ok
asd
123
20
Summary:
1. the one-line del-edit change doesn't "take"
2. it remains in the del editor instead of exiting
3. it prompts with line 2, when line 1 was requested
4. exiting the editor without new text erases the line (line 2 in this case)
5. yet setting the line, entering the new value, and leaving the del editor
works ok
6. several books say that the one-line "replace a line" edit works
- APL - An Introduction / A U-Program Work Text,
- APL - An Interactive Approach 3ed)
- MicroAPL says "[3]... Overwrite line 3 immediately"
7. the GNU APL document Section "3.8.1.4 The Del Editor" suggests this
should work.
8. interestingly, the build on macos Intel prompts with the requested line
1, instead of jumping to line 2. It also doesn't clear the line when
immediately exiting (when propmted on the wrong line).
9. builds of the apl-1.9.tgz bundle act the same on both platforms (just to
compare baselines)
10. it acts the same when I hide the .config/gnu-apl directory
11. I'm pretty sure I tried variations of "-std=gnu++17" also, with same
results
So. What am I doing wrong?
Thanks!
System and build info, ARM and Intel:
macos arm Sonoma 14.7.2
$ apl -v
BUILDTAG:
---------
Project: GNU APL
Version / SVN: 1.9 / SVN: 1821M
Build Date: 2025-01-17 17:44:10 UTC
Build OS: Darwin 23.6.0 arm64
config.status: default ./configure options
Archive SVN: 1779
$ gcc --version
Apple clang version 15.0.0 (clang-1500.3.9.4)
Target: arm64-apple-darwin23.6.0
Thread model: posix
InstalledDir:
/Users/x/Apps/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
macos Intel Catalina 10.15.7
$ apl -v
BUILDTAG:
---------
Project: GNU APL
Version / SVN: 1.9 / SVN: 1821M
Build Date: 2025-01-17 19:12:08 UTC
Build OS: Darwin 19.6.0 x86_64
config.status: default ./configure options
Archive SVN: 1779
$ gcc --version
Configured with: --prefix=/Users/aaa/Apps/Xcode.app/Contents/Developer/usr
--with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.29)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir:
/Users/x/Apps/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
--
Mike Hall
