Update of bug #55799 (group groff):
Status: None => Confirmed
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Follow-up Comment #2:
Now that we've got Advancing Dumping Technology™ in _groff_ Git's master
branch, we can obtain some insight into what's going on.
$ printf ".char a z\nplan\n.pline\n" | groff -z 2>&1 | jq
[
{
"type": "line_start_node",
"diversion level": 0,
"is_special_node": false
},
{
"type": "glyph_node",
"diversion level": 0,
"is_special_node": false,
"character": "p"
},
{
"type": "glyph_node",
"diversion level": 0,
"is_special_node": false,
"character": "l"
},
{
"type": "composite_node",
"diversion level": 0,
"is_special_node": false,
"character": "a"
},
{
"type": "glyph_node",
"diversion level": 0,
"is_special_node": false,
"character": "n"
},
{
"type": "word_space_node",
"diversion level": 0,
"is_special_node": false,
"hunits": 2500,
"undiscardable": false,
"is hyphenless breakpoint": false,
"terminal_color": "default",
"width_list": [
{
"width": 2500,
"sentence_width": 2500
}
],
"unformat": false
}
]
That redefined 'a' is not a `glyph_node`, but a `composite_node`.
And it also seems not to contain anything! Huh. Even having just written the
code to handle this, I'm surprised. Maybe I overlooked making
`composite_node` derive from `container_node`?
Anyway, we **can** verify that it's got an unusual property.
$ printf ".char a z\nplan\n.pchar a\n" | ./build/test-groff -z
character 'a'
is not translated
has a macro: "z"
special translation: 0
hyphenation code: 97
flags: 0
ASCII code: 97
asciify code: 0
is found
is transparently translatable
is not translatable as input
mode: normal
Interesting to me that while as rendered, this "a" will _look_ like "z", the
hyphenation system will still treat it like "a". But that seems okay. If you
want to change its hyphenation code, too, the `hcode` request hangs on the
pegboard in easy reach.
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