single-line comment contains line-continuation character
A single-line comment (introduced by //) contains a line-continuation character (\). The next line after the line-continuation character is ignored; it is considered to be the continuation of the previous line and is treated as a comment.
For performance reasons, some syntax-directed editors will not correctly indicate the physical line following the line-continuation character as a comment. You should ignore the syntax coloring on any lines that cause this warning.