Nested Conditionals and NOT conditionals

Hi there,

 

 

I've been meaning to ask for awhile how to do nested conditionals and use a "not" operator in iRules.

 

 

I frequently end up writing iRules that look like this:

 

 

if { $foo starts_with "bar" } {

 

Do Nothing

 

} else {

 

pool foo_pool

 

}

 

 

Would I get the same thing with just:

 

 

if { not $foo starts_with "bar" } {

 

pool foo_pool

 

}

 

 

Also, is it possible to do nested conditionals... something like:

 

 

if { {$foo starts_with "bar" or $bar ends_with "foo"} and {$baz == 5} } {

 

 

And ideally, combine these 2 to get something like:

 

 

if { { {not $foo starts_with "bar"} or $bar ends_with "foo"} and {$baz == 5} } {

 

 

I guess if I take the time to learn the operator precedence and how conditional comparisons evaluate from left to right, I wouldn't need the extra nesting. Still, as a programmer, I've always found value in adding extra parenthesis to make conditional logic easier to read. Hopefully, there's some similar syntax in Irules/TCL to do this because trying to program without the extra braces/parenthesis makes my head hurt.

 

 

Thanks!

 

-Dan