Execute o Schema one-liner a partir da linha de comando

Question

Como posso executar uma expressão Scheme a partir da linha de comando usando nem um script salvo em um arquivo, nem iniciando o shell interativo?

O equivalente em Python seria: python -c "print 1+1" . scheme (+ 1 1) apenas inicia o shell interativo e mostra o resultado dentro dele.

    

Answer 1

Eu instalei o guile e consegui que ele executasse o código de três maneiras:

1

$ guile <<< "(+ 1 1)"
GNU Guile 2.0.9
Copyright (C) 1995-2013 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type ',show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type ',show c' for details.

Enter ',help' for help.
$1 = 2
$ 

2

$ echo "(+ 1 1)" | guile
GNU Guile 2.0.9
Copyright (C) 1995-2013 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type ',show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type ',show c' for details.

Enter ',help' for help.
$1 = 2
scheme@(guile-user)>
$ 

3

$ echo "(+ 1 1)" > guile.script
$ guile < guile.script
GNU Guile 2.0.9
Copyright (C) 1995-2013 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type ',show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type ',show c' for details.

Enter ',help' for help.
$1 = 2
$ 

Em todos os casos, retornei ao prompt de shell original (indicado pelas linhas $ nuas).