How to write Common Lisp in 2017 – an initiation manual

Re:How to write Common Lisp in 2017 – an initiation manual by Guthur on Tuesday March 28, 2017 @07:43PM (#13981940)

It baffles me that this notion of Lisp as an interpreted language still persists. Common Lisp is a compiled language for all non toy implementations, and in general Lisps have had compilers for decades.

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Re:How to write Common Lisp in 2017 – an initiation manual by PuercoPop on Wednesday March 29, 2017 @12:39AM (#13983446)

It baffles me that people refer to languages as interpreted or compiled. That is a property of the implementation of the not the language.

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Re:How to write Common Lisp in 2017 – an initiation manual by nine_k on Tuesday March 28, 2017 @10:19PM (#13982773)

Having a good REPL is important, though.

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Re:How to write Common Lisp in 2017 – an initiation manual by hydandata on Tuesday March 28, 2017 @10:39PM (#13982887)

Having a REPL does not necessitate interpreting http://www.sbcl.org/manual/#Compiler_002donly-Implementation

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Re:How to write Common Lisp in 2017 – an initiation manual by nabla9 on Tuesday March 28, 2017 @10:39PM (#13982888)

REPL and interpretation are orthogonal concepts.

SBCL (most common CL implementation) don't have interpreter at all. It complies into machine code before execution even in REPL.

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Re:How to write Common Lisp in 2017 – an initiation manual by juki on Wednesday March 29, 2017 @12:00AM (#13983285)

SBCL actually does have an interpreter, but doesn't use it by default. You can set

    sb-ext:*evaluator-mode*

to :INTERPRET to enable it.

http://www.sbcl.org/manual/#Interpreter

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Re:How to write Common Lisp in 2017 – an initiation manual by lispm on Wednesday March 29, 2017 @01:02AM (#13983550)

Though, to be fair, a 'real' Lisp interpreter often provides more interactive features. The Lisp interpreter sees the code as Lisp data and interprets that. This enables a few things.

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Re:How to write Common Lisp in 2017 – an initiation manual by lokedhs on Wednesday March 29, 2017 @05:11AM (#13984509)

You don't need an interpreter for that. SBCL (as does other compilers) always compiles an expression prior to executing it, even when it's code as data passed to EVAL.

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Re:How to write Common Lisp in 2017 – an initiation manual by lispm on Wednesday March 29, 2017 @05:25AM (#13984556)

> You don't need an interpreter for that.

For what?

> You don't need an interpreter for that. SBCL (as does other compilers) always compiles an expression prior to executing it, even when it's code as data passed to EVAL.

True, but that's not what a Lisp interpreter does and provides.

I was talking about the difference between an interpreter and a (possibly interactive) compiler. The interpreter works over source code as Lisp data. The compiler does not - it does not matter that the compiler compiles individual forms. At runtime the code is machine code. With an interpreter the code is Lisp data.

Think about it: What difference could that make, if the code gets actually executed by a real Lisp interpreter?

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