You can view the Issue on github:
https://github.com/php/php-langspec/issues/248
Comment by dende:
I see, and i can follow that chain even to assignment-expression and simple-assignemnt-expression.
Thank you!
But I don't seem to find a way to generate an assignment from an
expression-statement.
All of
<pre>
include-expression
include-once-expression
require-expression
require-once-expression
</pre>
have their keywords "hardcoded" into them.
I see the chain from expression over logical-inc-OR-expression-2 to
yield-expression, but can not find a way to generate an
assignment-expression without the keywords yield or yield
from before it