vim/runtime/syntax/testdir/input/progress_comments.p

/*
 * VIM_TEST_SETUP set filetype=progress
 */

define variable customer_name as character no-undo.

/* The test setup above is an example of a multi-line comment.
This is too; the leading * and left-hand alignment are not required. */
for each customer no-lock
    where customer.customer_id = 12345
:
    assign cust_name = customer.customer_name. /* Comments can also appear
                                                  at the end of a line. */
end. /* for each customer */

/* Comments can be /* nested */. Here's the same query as above, but
commented out this time:

for each customer no-lock
    where customer.customer_id = 12345
:
    assign cust_name = customer.customer_name. /* Comments can also appear
                                                  at the end of a line. */
end. /* for each customer */

TODO: Note that /*/ does not end the comment, because it actually starts a
new comment whose first character is a '/'. Now we need two end-comment
markers to return to actual code. */ */

display customer_name.

// This is the single-line comment syntax.

//No space is required after the slashes. Also, a /* here does not begin a
//new block comment.

for each supplier no-lock:
    /* However, a block comment can end inside (what looks like) a
       single-line comment, because the slashes are just text as far as the
       // block comment is concerned. */
    display supplier.

    // TODO: Observe that todo highlighting works in line comments too.
end.