that's SQF syntax… in Enfusion we do

if (damageContext.damageType & (EDamageType.COLLISION | EDamageType.FIRE | EDamageType.REGENERATION))
     return;

:-)

otherwise, a bit more bruteforce would be

ref array<EDamageType> m_aForbiddenDamageTypes = { EDamageType.COLLISION, EDamageType.FIRE, EDamageType.REGENERATION };

// ...

if (m_aForbiddenDamageTypes.Contains(damageContext.damageType))
	return;

In T182389#2629802, @LouMontana wrote:

that's SQF syntax… in Enfusion we do

if (damageContext.damageType & (EDamageType.COLLISION | EDamageType.FIRE | EDamageType.REGENERATION))
     return;

:-)

it works differently - it was unable to move further with non-collision, non-fire and non-regen damage types.
About the array way - well, it would be great if there was an ability to avoid additional allocation here (especially in frequently called functions as damage event handlers).

ah, correct - they are not flags (1 2 4 8 16), just enum values (0 1 2 3 4), my bad on this one
doing x in [a, b, c] in SQF also creates and allocates an array (in C# too)

but no, there is no easy shortcut in Enfusion - it may be a bit boilerplate, but it's the most efficient

Yeah, this is why I'm proposing thing from OP. :)
It's an compilable scripting language anyway, so compiler could handle this synthax sugar and unfold it in an ordinary || manner.

In C#, one would use the is, or, and operators with braces which the compiler lowers into comparison checks.
example for C#:

csharp
if (damageContext.damageType is EDamageType.COLLISION or EDamageType.FIRE or EDamageType.REGENERATION)
     return;

Note in the lowering process on the right side, the compiler attempts to use any possible optimisation to skip unnecessary checks. In this case it does a bounds check since two of the enum options were adjacent.
https://sharplab.io/#v2:EYLgxg9gTgpgtADwGwBYA+ABATARgLABQGAzAATakDCpA3oaQ+WRiqQLIAUAlLfY/wBEAhgFshAcxiUIAOwAuMBHNIATURKmyFS0gF5SMmAHdutVeskAVAJ4AHGHtIBRYWKt2YAOkoB5ADJ+AJIAyoE+AHKkAL4A3Hz8DACWAGakHGpumvKKcp4ZGjb2pIkAzs6uBR7e/kGhEaTQ5RYwhV4AYoEASk4NUE2ZrZ7dAOJO4U6dAIKWYeFc8Qn8GADscQT8UYSbBIQUFZLS2Tp064wk/ZVF+e5FNKSScjGkJTCP0VuEhDAyAK4iFzcHCd+OEIk4ADQLXwBEKzSGnBgdbrw/htSYw8LDFGMEZjCbTOELSZsHzDACqwXhUSAA