Parse zero or more attribute specifiers.
(parse-*-attribute-specifier parstate) → (mv erp attrspecs span new-parstate)
We parse a
If the next token is the
If there are no attribute specifiers, we return an irrelevant span. When combining the span of the first attribute specifier (if present) with the span of the remaining zero or more attribute specifiers, we join spans only if the remaining ones are one or more; if there are zero, the span of the first attribute specifier is also the span of the whole sequence.
If GCC extensions are not supported,
this parsing function always returns the empty list,
because