Expressions And Operators: Operator Precedence
The precedence of Hack operators is shown in the table below.
Operators higher in the table have a higher precedence (binding more tightly). Binary operators on the same row are evaluated according to their associativity.
| Operator | Associativity |
|---|---|
\ |
Left |
[] |
Left |
-> ?-> |
Left |
new |
None |
() |
Left |
clone |
None |
await ++ -- (postfix) |
Right |
(int) (float) (string) ** @ ++ -- (prefix) |
Right |
is as ?as |
Left |
! ~ + - (one argument) |
Right |
* / % |
Left |
. + - (two arguments) |
Left |
<< >> |
Left |
< <= > >= <=> |
None |
=== !== == != |
None |
&& |
Left |
^ |
Left |
|| |
Left |
& |
Left |
| |
Left |
?? |
Right |
? : ?: |
Left |
|> |
Left |
= += -= .= *= /= %= <<= >>= &= ^= |= ??= |
Right |
print |
Right |
include require |
Left |