quote special YAML keywords when dumping about yaml-pp-p5

[perlpunk]

YAML::PP is using the YAML 1.2 Core schema as a default.
For a comparison: https://perlpunk.github.io/YAML-PP-p5/schemas.html
In YAML 1.1, no was resolved as a boolean, but not anymore in YAML 1.2.
You can use the 1.1 schema explicitly: https://metacpan.org/pod/YAML::PP::Schema::YAML1_1

But 3x doesn't need quotes in any of the schemas.

Hope that helps :)

[perlpunk]

Btw, if you simply want to preserve the quoting style from loading, you can use:

YAML::PP->new( preserve => PRESERVE_SCALAR_STYLE );

See the preserve option here: https://metacpan.org/pod/YAML::PP#new
It's still experimental though and might not work correctly for all styles.

[maxatome]

Hi,
Sorry for the delay. I missed the YAML 1.1 vs 1.2 differences. I have to check on decoder side (not YAML::PP one) why I encountered a problem with "3x".
Sorry for the noise @perlpunk and thanks!