[ragel-users] Basic question on use of grouping in Ragel

[Programmist Setevik]

Reading through Ragel guide, I see examples like this one:

# Match a word followed by a newline. Execute A when
# finishing the word.
main :=* (* lower+ %A *)* . '\n';

Question I have is: why is grouping used here ? Could this be written
simply as

main :=* * lower+ %A . '\n';

And if not, what would be the difference ?
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[Adrian Thurston]

It is unnecessary, only there to make the parse of the expression explicit.

Post by Programmist Setevik
# Match a word followed by a newline. Execute A when
# finishing the word.
main :=*(* lower+ %A *)* . '\n';
Question I have is: why is grouping used here ? Could this be written
simply as
main :=** lower+ %A . '\n';
And if not, what would be the difference ?
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