On Wed, 25 Mar 2020 at 15:29, Ilija Tovilo <ilija.tov...@me.com> wrote:
> I don't think this would add any significant benefit over: > > ```php > $x = true switch { > $x !== null && $x < 5 => ... > } > ``` > The problem with that is that it requires a temporary variable to be switched on. If I want to switch on, say, a method call, I can write this for equality: $result = $this->foo($bar) switch { 1 => 'hello', 2 => 'hi', 3 => 'goodbye' }; For inequalities, the switch(true) version looks something like this (the parentheses would probably be optional, but I'd personally use them for readability): $temp = $this->foo($bar); $result = true switch { ($temp <= 1) => 'hello', ($temp == 2) => 'hi', default => 'goodbye' } Using $$ to mean "value tested" would mean you could get rid of the temp variable, and just write this: $result = $this->foo($bar) switch { ($$ <= 1) => 'hello', ($$ == 2) => 'hi', default => 'goodbye' }; I've also previously thought about specifying an operator for switch statements, which could be used with expressions as well, e.g. $result = $this->foo($bar) switch <= { 1 => 'hello', 2 => 'hi', default => 'goodbye' }; Again, though, this is something that could be added to switch statements and expressions together, as a separate RFC. Regards, -- Rowan Tommins [IMSoP]