[PATCH v2 07/10] wildmatch: explicitly mark intentional use of the comma operator

From: Johannes Schindelin <johannes.schindelin@gmx.de>

The comma operator is a somewhat obscure C feature that is often used by mistake and can even cause unintentional code flow. That is why the `-Wcomma` option of clang was introduced: To identify unintentional uses of the comma operator.

To mark such a usage as intentional, the value needs to be cast to `void`, which we do here.

In this instance, the usage is intentional because it allows storing the value of the current character as `prev_ch` before making the next character the current one, all of which happens in the loop condition that lets the loop stop at a closing bracket.

The alternative to using the comma operator would be to move those assignments from the condition into the loop body; In this particular case that would require the assignments to either be duplicated or to introduce and use a `goto` target before the assignments, though, because the loop body contains a `continue` for the case where a character class is found that starts with `[:` but does not end in `:]` (and the assignments should occur even when that code path is taken).

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
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 wildmatch.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)