[css-values-5] How to determine the type of in calc-mix()?

[cdoublev]

The type of calc-mix() must be made consistent with the type of its , which is defined with:

= [ | | <'animation-timeline'>] && [by ]?

What is the type of in these examples?

1. calc-mix(0%, 1px, 2px) in a context
2. calc-mix(calc(0%), 1px, 2px) in a context
3. calc-mix(--timeline, 1px, 2px)

My respective guesses:

1. [percentage → 1]
2. [percentage → 1]
3. []

In my opinion, the type of calc(0%) matching should always be [percentage → 1], whatever the "higher" context is.

[cdoublev]

Sorry, I missed that should actually have been replaced with in the production rule, as explained in the detailed definition appearing below the production rule:

[...]

Note: This only allows literal percentages, like 15%; calculations like calc(100% / 7) will not work [...].

But this restriction seems to be motivated solely by internal constraints that authors would not understand it, imo.

Would it not be possible to say that always resolves to [percentage → 1] as a term of a math function replacing ?

[cdoublev]

This issue is no longer valid after the change in 5fbd75b.