[mediaqueries-5] [css-syntax-3] Unclear how <general-enclosed> is terminated

[tbjgolden]

When reading a general enclosed expression, it says to consume an <any-value> production. However it doesn't mention how to detect how this production terminates. Does it read until the first ) - or does it also allow nesting parentheses pairs ( ... ) (or indeed [ ... ] and other groupings)?

[cdoublev]

However it doesn't mention how to detect how this production terminates.

It terminates with the end of the input. Any CSS input goes through consume a list of component values, which consumes (...), [...], {...}, into a single component value.

component value

A component value is one of the preserved tokens, a function, or a simple block.

preserved tokens

Any token produced by the tokenizer except for <function-token>s, <{-token>s, <(-token>s, and <[-token>s.

NOTE: The non-preserved tokens listed above are always consumed into higher-level objects, either functions or simple blocks, and so never appear in any parser output themselves.

https://drafts.csswg.org/css-syntax-3/#preserved-tokens

[tbjgolden]

Ah okay - I think I understand now; thank you!