Why is ""="" == "" true?

[vefatica]

Just curious!

v:\> if ""="" == "" echo yes
yes

 

[Charles Dye]

It's not nice to fool Mother Parser!

 

[rconn]

You provided IF with two test comparisons when it only supports one, so it discarded the first one and used the second.

What did you *intend* that malformed IF to do?

 

[vefatica]

It came from a statement like this. I almost always quote regexes (whether they need it or not) and in a test, I wanted to use the regex "=".

if "%1" != "" (set regex=%1) else (echoerr tgrep: Missing regex & quit)

I changed it to this.

if *%1* != ** (set regex=%1) else (echoerr tgrep: Missing regex & quit)