gistfile1.txt

# last value in an expression block is returned
do
    true

# when we want to return multiple arguments, there's a pass-through token:
do
    _ true true

# how do we pass zero arguments?
do
    _; # semicolon causes it to still be wrapped in a list

# though one could make the mistake and return the token instead
do
    _

# how about a different way to pass zero arguments?
do
    ; # semicolon causes an empty list to be generated

##### AND FROM HERE ON, LET'S DREAM A LITTLE #####

# in fact, why not make zero arguments the pass-through function?
do
    () true true

# which means we could now alias _ differently
let _ = ()
do
    _ true true

# and the single token is no longer a mistake
do
    _

# what about calling arguments with arguments?
do
    (_ f) true true
    # obviously the same as
    f true true

# what about calling MULTIPLE arguments with arguments?
do
    (_ f1 f2 f3) true true
    # might be the same as
    _
        f1 true true
        f2 true true
        f3 true true