Scala - Explicitly stating the short circuiting in defining && and || functions -

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in scala source code boolean (here), said functions && , || can not defined using => syntax.

// compiler won't build these seemingly more accurate signatures // def ||(x: => boolean): boolean // def &&(x: => boolean): boolean

but can't see problem definitions!

the source code said won't rather can't, maybe have wrongly interpreted it.

if see line 56 of boolean.scala, find explaination ||.

this method uses 'short-circuit' evaluation , behaves if declared def ||(x: => boolean): boolean. if a evaluates true, true returned without evaluating b.

same && in source code. sum up, can define there no need because of short-circuiting.


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