% pugs -c -e 'print "Hello, $world!"'
{ Statements
    [(
        App "&prefix:print"
            [App "&prefix:~"
                [App "&infix:~"
                    [Val (VStr "Hello, ")
                    ,App "&infix:~"
                        [Var "$world"
                        ,Val (VStr "!")
                        ] []
                    ] []
                ] []
            ] []
        ,"<interactive>" (line 1, column 1)
    )]
}