Grammar question. TypeSuffix - what is [ AssignExpression .. AssignExpression ] production for?

[WB]

On Wednesday, 4 September 2024 at 17:31:53 UTC, Nick Treleaven 
wrote:
> On Monday, 2 September 2024 at 16:35:11 UTC, monkyyy wrote:
>> Good docs for what seq does, doesnt exist; period. You have to 
>> learn from trail and error.
>
> What's wrong with:
>
>> So maybe 
>> https://dlang.org/spec/template.html#variadic-templates , 
>> where more specifically 
>> https://dlang.org/spec/template.html#seq-ops mentions slicing 
>> operation on these sequences ?

The problem is that these two places are not mentioned anywhere 
on the page where grammar rules are present for them ( 
https://dlang.org/spec/grammar.html#TypeSuffix and 
https://dlang.org/spec/type.html#grammar ), making it hard to 
discover / understand.