--- /dev/null
+Yield
+-----
+<?php
+
+function gen()
+{
+ yield;
+ yield $a;
+ yield $a => $b;
+ $a = yield;
+ $a = (yield $b);
+ $a = (yield $b => $c);
+}
+// TODO Get rid of parens for cases 2 and 3
+-----
+function gen()
+{
+ yield;
+ (yield $a);
+ (yield $a => $b);
+ $a = yield;
+ $a = (yield $b);
+ $a = (yield $b => $c);
+}
+// TODO Get rid of parens for cases 2 and 3
+-----
+<?php
+
+function gen()
+{
+ $a = yield $b;
+ $a = yield $b => $c;
+ yield from $a;
+ $a = yield from $b;
+}
+// TODO Get rid of parens for last case
+-----
+!!php7
+function gen()
+{
+ $a = (yield $b);
+ $a = (yield $b => $c);
+ yield from $a;
+ $a = (yield from $b);
+}
+// TODO Get rid of parens for last case
\ No newline at end of file