[vim/vim] yamlPlainScalar globs all special characters until whitespace in yaml syntax highlighting (Issue #15444)

Eugenio Bargiacchi

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Aug 7, 2024, 10:15:12 AM8/7/24

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Steps to reproduce

Write a .yaml file
Write a: foo("{ }")
The string does not open at the first quotes, but only at the second, and keeps going from there.
Write b: foo("abc")
String is not recognized as such.

Expected behaviour

I have detected the type of the first part as a yamlPlainScalar by running the following command with the cursor on it:

:let s = synID(line('.'), col('.'), 1) | echo synIDattr(s, 'name') . ' -> ' . synIDattr(synIDtrans(s), 'name')

As far as I can see, yamlPlainScalar is the "default" token. It seems that once it starts it only ends for whitespace. I would expect it to end on parentheses, quotes and other special characters and not glob them all.

I tried to debug the syntax file but it is beyond me unfortunately.

Version of Vim

VIM - Vi IMproved 9.1 Included patches: 1-16

Environment

Lubuntu 24.04

Logs and stack traces

No response

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Eugenio Bargiacchi

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Aug 7, 2024, 10:25:58 AM8/7/24

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This seems to be very related to #8234 .

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itchyny

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Sep 20, 2024, 9:57:50 AM9/20/24

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In YAML syntax, there is no special meaning in double quoted string inside a plain (=unquoted) style string. So b: foo("abc") has a plain style string foo("abc") and that's all. To recognize "abc" as a string, that'll require an embedded syntax inside YAML. So the remaining issue here is that { } in a: foo("{ }") is incorrectly recognized as a mapping (object).