Resolves (x) and { ...; x } to the Value of x. A grouping has the value of the expression it wraps and a block the value of its last expression, so both fold like that expression itself.
(x)
{ ...; x }
x
Resolves
(x)and{ ...; x }to the Value ofx. A grouping has the value of the expression it wraps and a block the value of its last expression, so both fold like that expression itself.