Compare equality of 2 `struct`s #Julia

struct_equal.jl

# See https://github.com/JuliaLang/julia/issues/4648#issuecomment-761030051
# ASSUMTION: `e1` and `e2` have the same run-time type
@generated structEqual(e1, e2) = begin
    if fieldcount(e1) == 0
        return :(true)
    end
    mkEq    = fldName -> :(e1.$fldName == e2.$fldName)
    # generate individual equality checks
    eqExprs = map(mkEq, fieldnames(e1))
    # construct &&-expression for chaining all checks
    mkAnd   = (expr, acc) -> Expr(:&&, expr, acc)
    # no need in initial accumulator because eqExprs is not empty
    foldr(mkAnd, eqExprs)
end