The lack Reference Manual

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The lack Reference Manual

This is the lack Reference Manual, version 0.1, generated automatically by Declt version 4.0 beta 2 "William Riker" on Thu Sep 15 05:11:00 2022 GMT+0.

Table of Contents


1 Introduction

Lack, the core of Clack

Build Status Coverage Status

Lack is a Common Lisp library which allows web applications to be constructed of modular components. It was originally a part of Clack, however it's going to be rewritten as an individual project since Clack v2 with performance and simplicity in mind.

The scope is defining Lack applications and wrapping it up with Lack middlewares. On the other hand, Clack is an abstraction layer for HTTP and HTTP servers and provides unified API.

Warning

This software is still BETA quality. The APIs are being finalized.

Usage

(defparameter *app*
  (lambda (env)
    '(200 (:content-type "text/plain") ("Hello, World"))))

;; `wrap` the app with middleware
(setf *app* (funcall lack-middleware-session:*lack-middleware-session* *app*))

;; to wrap with multiple middlewares at once, use lack's builder macro
(setf *app*
  (lack:builder
    :session
    (:static :path "/public/"
             :root #P"/static-files/")
    (lambda (app)
      (lambda (env)
        (prog1 (funcall app env)
          (do-before-responding))))
    *app*))

Use Clack's clackup for starting a Lack application.

(clack:clackup *app* :server :woo)

The Environment

The environment, an application takes, is a property list containing the following keys:

The Response

Normal response

An application returns a list of three elements for a normal request, which respectively expresses an HTTP status code, headers, and response body data.

(lambda (env)
  (declare (ignore env))
  '(200 (:content-type "text/plain") ("Hello, World")))

The status code must be an integer greater than or equal to 100, and should be an HTTP status code as documented in RFC 2616.

The headers must be a property list. If the same key name appears multiple times in it, those header lines will be sent to the client separately (e.g. multiple Set-Cookie lines).

The response body must be returned from the application in one of three formats, a list of strings, a byte vectors, or a pathname.

Delayed Response and Streaming Body

Lack allows applications to provide a callback-style response instead of the three-element list. This allows for a delayed response and a streaming body.

To enable a delayed response, the application should return a callback as its response.

(lambda (env)
  (lambda (responder)
    (let ((content (fetch-something)))
      (funcall responder `(200 (:content-type "text/plain") (,content))))))

An application may omit the third element (the body) when calling the responder. If the body is omitted, the responder will return a function which takes a body chunk, and optional :start, :end and :close keyword arguments.

(lambda (env)
  (lambda (responder)
    (let ((writer (funcall responder '(200 (:content-type "application/json")))))
      (loop for chunk = (fetch-something)
            do (funcall writer chunk :close (null chunk))
            while chunk))))

In case of that you would prefer a stream to a function, lack.util.writer-stream wraps the function and allows you to treat it as a stream:

(import 'lack.util.writer-stream:make-writer-stream)

(lambda (env)
  (lambda (responder)
    (let* ((writer (funcall responder '(200 (:content-type "application/json"))))
           (stream (make-writer-function writer)))
      (loop for chunk = (fetch-something)
            do (write-sequence chunk stream)
            while chunk
            finally
              (finish-output stream)))))

This delayed response and streaming API is useful if you want to implement a non-blocking I/O based server streaming or long-poll Comet push technology.

Middlewares

Lack middleware is a component wrapping an application. It is a function which takes an application and returns a new application.

(defvar *mw*
  (lambda (app)
    (lambda (env)
      ;; preprocessing
      (let ((res (funcall app env)))
        ;; postprocessing
        res))))

;; getting a wrapped app
(funcall *mw* *app*)

Lack provides some bundle middlewares.

;; Using Lack.Middleware.Accesslog
(funcall lack.middleware.accesslog:*lack-middleware-accesslog*
         *app*)

Using Lack.Builder

Lack.Builder gives you a quick DSL to wrap your application with Lack middlewares.

(lack:builder
 (:static :path (lambda (path)
                  (if (ppcre:scan "^(?:/images/|/css/|/js/|/robot\\.txt$|/favicon.ico$)" path)
                      path
                      nil))
          :root *static-directory*)
 :accesslog
 :session
 :backtrace
 (lambda (env)
   (declare (ignore env))
   '(200 () ("Hello, World"))))

It takes a list of middlewares and an app at the last.

builder middleware* app

middleware ::= keyword
             | null
             | symbol
             | function
             | (keyword arg*)
             | (symbol arg*)
             | normal-form

app ::= function

Typical builder syntax is like this:

(lack:builder
  :foo
  (:bar :opt "val")
  *app*)

is syntactically equal to:

(funcall lack.middleware.foo:*lack-middleware-foo*
         (funcall lack.middleware:bar:*lack-middleware-bar*
                  *app*
                  :opt "val"))

Inline middleware

(lack:builder
  (lambda (app)
    (lambda (env)
      ;; preprocessing
      (let ((res (funcall app env)))
        ;; postprocessing
        res)))
  *app*)

Conditional middleware

(lack:builder
  (if (productionp)
      nil
      :accesslog)
  (if *error-log*
      `(:backtrace :output ,*error-log*)
      nil)
  :session
  *app*)

Using Lack in an existing Clack app

Just replace clack.builder:builder by lack:builder, a superset of clack.builder:builder.

Benchmark

| Hunchentoot | Clack | Lack | |---------------|---------|---------| | 3384.15 | 3896.51 | 4252.68 |

Lack is 1.25 times faster than Hunchentoot and 1.1 times faster than Clack.

You can get the benchmark code at "benchmark/".

Hunchentoot

wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
  4 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     1.32ms    8.92ms  78.41ms   98.62%
    Req/Sec     3.59k     0.93k    5.55k    73.51%
  33857 requests in 10.00s, 7.62MB read
  Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec:   3384.15
Transfer/sec:    779.94KB

Clack

wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
  4 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     3.52ms   23.39ms 170.24ms   98.07%
    Req/Sec     4.13k   768.76     4.67k    95.03%
  38996 requests in 10.01s, 10.12MB read
  Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec:   3896.51
Transfer/sec:      1.01MB

Lack

wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
  4 threads and 10 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     3.88ms   25.06ms 175.76ms   97.92%
    Req/Sec     4.52k   832.13     5.11k    94.92%
  42601 requests in 10.02s, 11.01MB read
  Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec:   4252.68
Transfer/sec:      1.10MB

Author

Copyright

Copyright (c) 2015 Eitaro Fukamachi & contributors

License

Licensed under the LLGPL License.


2 Systems

The main system appears first, followed by any subsystem dependency.


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2.1 lack

A minimal Clack

Author

Eitaro Fukamachi

License

LLGPL

Long Description

# Lack, the core of Clack

[![Build Status](https://travis-ci.org/fukamachi/lack.svg?branch=master)](https://travis-ci.org/fukamachi/lack)
[![Coverage Status](https://coveralls.io/repos/fukamachi/lack/badge.svg?branch=master)](https://coveralls.io/r/fukamachi/lack)

Lack is a Common Lisp library which allows web applications to be constructed of modular components. It was originally a part of [Clack](https://github.com/fukamachi/clack), however it’s going to be rewritten as an individual project since Clack v2 with performance and simplicity in mind.

The scope is defining Lack applications and wrapping it up with Lack middlewares. On the other hand, [Clack](https://github.com/fukamachi/clack) is an abstraction layer for HTTP and HTTP servers and provides unified API.

## Warning

This software is still BETA quality. The APIs are being finalized.

## Usage

“‘common-lisp
(defparameter *app*
(lambda (env)
’(200 (:content-type "text/plain") ("Hello, World"))))

;; ‘wrap‘ the app with middleware
(setf *app* (funcall lack-middleware-session:*lack-middleware-session* *app*))

;; to wrap with multiple middlewares at once, use lack’s builder macro
(setf *app*
(lack:builder
:session
(:static :path "/public/"
:root #P"/static-files/")
(lambda (app)
(lambda (env)
(prog1 (funcall app env)
(do-before-responding))))
*app*))
“‘

Use Clack’s ‘clackup‘ for starting a Lack application.

“‘common-lisp
(clack:clackup *app* :server :woo)
“‘

## The Environment

The environment, an application takes, is a property list containing the following keys:

- ‘:request-method‘ (Required, Keyword)
- The HTTP request method: ‘:GET‘, ‘:HEAD‘, ‘:OPTIONS‘, ‘:PUT‘, ‘:POST‘, or ‘:DELETE‘.
- ‘:script-name‘ (Required, String)
- The initial portion of the request URI path that corresponds to the Clack application. The value of this key may be an empty string when the client is accessing the application represented by the server’s root URI. Otherwise, it is a non-empty string starting with a forward slash (‘/‘). - ‘:path-info‘ (Required, String)
- The remainder of the request URI path. The value of this key may be an empty string when you access the application represented by the server’s root URI with no trailing slash.
- ‘:query-string‘ (Optional, String)
- The portion of the request URI that follows the ‘?‘, if any.
- ‘:url-scheme‘ (Required, String)
- ‘"http"‘ or ‘"https"‘, depending on the request URI.
- ‘:server-name‘ (Required, String)
- The resolved server name or the server IP address.
- ‘:server-port‘ (Required, Integer)
- The port on which the request is being handled.
- ‘:server-protocol‘ (Required, Keyword)
- The version of the protocol the client used to send the request: typically ‘:HTTP/1.0‘ or ‘:HTTP/1.1‘.
- ‘:request-uri‘ (Required, String)
- The request URI. Always starts with "/".
- ‘:raw-body‘ (Optional, Stream)
- The new body of the request.
- ‘:remote-addr‘ (Required, String)
- The remote address.
- ‘:remote-port‘ (Required, Integer)
- The remote port.
- ‘:content-type‘ (Optional, String)
- The header value of Content-Type.
- ‘:content-length‘ (Optional, Integer)
- The header value of Content-Length.
- ‘:headers‘ (Required, Hash-Table)
- A hash table of headers.

## The Response

### Normal response

An application returns a list of three elements for a normal request, which respectively expresses an HTTP status code, headers, and response body data.

“‘common-lisp
(lambda (env)
(declare (ignore env))
’(200 (:content-type "text/plain") ("Hello, World")))
“‘

The status code must be an integer greater than or equal to 100, and should be an HTTP status code as documented in [RFC 2616](https://www.ietf.org/rfc/rfc2616.txt).

The headers must be a property list. If the same key name appears multiple times in it, those header lines will be sent to the client separately (e.g. multiple ‘Set-Cookie‘ lines).

The response body must be returned from the application in one of three formats, a list of strings, a byte vectors, or a pathname.

### Delayed Response and Streaming Body

Lack allows applications to provide a callback-style response instead of the three-element list. This allows for a delayed response and a streaming body.

To enable a delayed response, the application should return a callback as its response.

“‘common-lisp
(lambda (env)
(lambda (responder)
(let ((content (fetch-something)))
(funcall responder ‘(200 (:content-type "text/plain") (,content))))))
“‘

An application may omit the third element (the body) when calling the responder. If the body is omitted, the responder will return a function which takes a body chunk, and optional ‘:start‘, ‘:end‘ and ‘:close‘ keyword arguments.

“‘common-lisp
(lambda (env)
(lambda (responder)
(let ((writer (funcall responder ’(200 (:content-type "application/json")))))
(loop for chunk = (fetch-something)
do (funcall writer chunk :close (null chunk))
while chunk))))
“‘

In case of that you would prefer a stream to a function, ‘lack.util.writer-stream‘ wraps the function and allows you to treat it as a stream:

“‘common-lisp
(import ’lack.util.writer-stream:make-writer-stream)

(lambda (env)
(lambda (responder)
(let* ((writer (funcall responder ’(200 (:content-type "application/json"))))
(stream (make-writer-function writer)))
(loop for chunk = (fetch-something)
do (write-sequence chunk stream)
while chunk
finally
(finish-output stream)))))
“‘

This delayed response and streaming API is useful if you want to implement a non-blocking I/O based server streaming or long-poll Comet push technology.

## Middlewares

Lack middleware is a component wrapping an application. It is a function which takes an application and returns a new application.

“‘common-lisp
(defvar *mw*
(lambda (app)
(lambda (env)
;; preprocessing
(let ((res (funcall app env)))
;; postprocessing
res))))

;; getting a wrapped app
(funcall *mw* *app*)
“‘

Lack provides some bundle middlewares.

* Lack.Middleware.Accesslog
* Lack.Middleware.Auth.Basic
* Lack.Middleware.Backtrace
* Lack.Middleware.Csrf
* Lack.Middleware.Mount
* Lack.Middleware.Session
* Lack.Middleware.Static

“‘common-lisp
;; Using Lack.Middleware.Accesslog
(funcall lack.middleware.accesslog:*lack-middleware-accesslog*
*app*)
“‘

### Using Lack.Builder

Lack.Builder gives you a quick DSL to wrap your application with Lack middlewares.

“‘common-lisp
(lack:builder
(:static :path (lambda (path)
(if (ppcre:scan "^(?:/images/|/css/|/js/|/robot\\.txt$|/favicon.ico$)" path)
path
nil))
:root *static-directory*)
:accesslog
:session
:backtrace
(lambda (env)
(declare (ignore env))
’(200 () ("Hello, World"))))
“‘

It takes a list of middlewares and an app at the last.

“‘
builder middleware* app

middleware ::= keyword
| null
| symbol
| function
| (keyword arg*)
| (symbol arg*)
| normal-form

app ::= function
“‘

Typical builder syntax is like this:

“‘common-lisp
(lack:builder
:foo
(:bar :opt "val")
*app*)
“‘

is syntactically equal to:

“‘common-lisp
(funcall lack.middleware.foo:*lack-middleware-foo*
(funcall lack.middleware:bar:*lack-middleware-bar*
*app*
:opt "val"))
“‘

### Inline middleware

“‘common-lisp
(lack:builder
(lambda (app)
(lambda (env)
;; preprocessing
(let ((res (funcall app env)))
;; postprocessing
res)))
*app*)
“‘

### Conditional middleware

“‘common-lisp
(lack:builder
(if (productionp)
nil
:accesslog)
(if *error-log*
‘(:backtrace :output ,*error-log*)
nil)
:session
*app*)
“‘

## Using Lack in an existing Clack app

Just replace ‘clack.builder:builder‘ by ‘lack:builder‘, a superset of ‘clack.builder:builder‘.

## Benchmark

| Hunchentoot | Clack | Lack |
|—————|———|———|
| 3384.15 | 3896.51 | 4252.68 |

Lack is 1.25 times faster than Hunchentoot and 1.1 times faster than Clack.

* MacBook Pro Retina, 13-inch, Early 2013 (CPU: 3GHz Intel Core i7 / Memory: 8GB 1600 MHz)
* SBCL 1.2.6
* wrk 3.1.1
* Hunchentoot 1.2.29

You can get the benchmark code at "[benchmark/](https://github.com/fukamachi/lack/tree/master/benchmark)".

### Hunchentoot

“‘
wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
4 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 1.32ms 8.92ms 78.41ms 98.62%
Req/Sec 3.59k 0.93k 5.55k 73.51%
33857 requests in 10.00s, 7.62MB read
Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec: 3384.15
Transfer/sec: 779.94KB
“‘

### Clack

“‘common-lisp
wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
4 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 3.52ms 23.39ms 170.24ms 98.07%
Req/Sec 4.13k 768.76 4.67k 95.03%
38996 requests in 10.01s, 10.12MB read
Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec: 3896.51
Transfer/sec: 1.01MB
“‘

### Lack

“‘common-lisp
wrk -c 10 -t 4 -d 10 http://127.0.0.1:5000
Running 10s test @ http://127.0.0.1:5000
4 threads and 10 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 3.88ms 25.06ms 175.76ms 97.92%
Req/Sec 4.52k 832.13 5.11k 94.92%
42601 requests in 10.02s, 11.01MB read
Socket errors: connect 0, read 0, write 0, timeout 33
Requests/sec: 4252.68
Transfer/sec: 1.10MB
“‘

## Author

* Eitaro Fukamachi (e.arrows@gmail.com)

## Copyright

Copyright (c) 2015 Eitaro Fukamachi & [contributors](https://github.com/fukamachi/lack/graphs/contributors)

## License

Licensed under the LLGPL License.

Version

0.1

Dependencies
Source

lack.asd.

Child Component

src (module).


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2.2 lack-component

Author

Eitaro Fukamachi

License

LLGPL

Version

0.1

Source

lack-component.asd.

Child Component

src/component.lisp (file).


Previous: , Up: Systems   [Contents][Index]

2.3 lack-util

Author

Eitaro Fukamachi

License

LLGPL

Version

0.1

Dependencies
  • ironclad (system)., for feature (:or :mswindows :win32 :cormanlisp)
  • cl-isaac (system)., for feature (:not (:or :mswindows :win32 :cormanlisp))
Source

lack-util.asd.

Child Component

src/util.lisp (file).


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3 Modules

Modules are listed depth-first from the system components tree.


Previous: , Up: Modules   [Contents][Index]

3.1 lack/src

Source

lack.asd.

Parent Component

lack (system).

Child Components

4 Files

Files are sorted by type and then listed depth-first from the systems components trees.


Previous: , Up: Files   [Contents][Index]

4.1 Lisp


4.1.1 lack/lack.asd

Source

lack.asd.

Parent Component

lack (system).

ASDF Systems

lack.

Packages

lack-asd.


4.1.2 lack-component/lack-component.asd

Source

lack-component.asd.

Parent Component

lack-component (system).

ASDF Systems

lack-component.

Packages

lack-component-asd.


4.1.3 lack-util/lack-util.asd

Source

lack-util.asd.

Parent Component

lack-util (system).

ASDF Systems

lack-util.

Packages

lack-util-asd.


4.1.4 lack/src/lack.lisp

Dependency

builder.lisp (file).

Source

lack.asd.

Parent Component

src (module).

Packages

lack.


4.1.5 lack/src/builder.lisp

Source

lack.asd.

Parent Component

src (module).

Packages

lack.builder.

Public Interface

builder (macro).

Internals

4.1.6 lack-component/src/component.lisp

Source

lack-component.asd.

Parent Component

lack-component (system).

Packages

lack.component.

Public Interface

4.1.7 lack-util/src/util.lisp

Source

lack-util.asd.

Parent Component

lack-util (system).

Packages

lack.util.

Public Interface
Internals

5 Packages

Packages are listed by definition order.


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5.1 lack-util-asd

Source

lack-util.asd.

Use List
  • asdf/interface.
  • common-lisp.

5.2 lack.builder

Source

builder.lisp.

Use List

common-lisp.

Public Interface

builder (macro).

Internals

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5.3 lack-component-asd

Source

lack-component.asd.

Use List
  • asdf/interface.
  • common-lisp.

Next: , Previous: , Up: Packages   [Contents][Index]

5.4 lack.component

Source

src/component.lisp.

Use List

common-lisp.

Public Interface

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5.5 lack-asd

Source

lack.asd.

Use List
  • asdf/interface.
  • common-lisp.

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5.6 lack

Source

lack.lisp.

Use List

common-lisp.


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5.7 lack.util

Source

src/util.lisp.

Use List

common-lisp.

Public Interface
Internals

6 Definitions

Definitions are sorted by export status, category, package, and then by lexicographic order.


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6.1 Public Interface


6.1.1 Macros

Macro: builder (&rest app-or-middlewares)
Package

lack.builder.

Source

builder.lisp.


6.1.2 Ordinary functions

Function: content-length (res)
Package

lack.util.

Source

src/util.lisp.

Function: find-middleware (identifier)
Package

lack.util.

Source

src/util.lisp.

Function: find-package-or-load (package-name)
Package

lack.util.

Source

src/util.lisp.

Function: funcall-with-cb (app env cb)
Package

lack.util.

Source

src/util.lisp.

Function: generate-random-id ()

Generates a random token.

Package

lack.util.

Source

src/util.lisp.


6.1.3 Generic functions

Generic Function: call (component env)
Package

lack.component.

Source

src/component.lisp.

Methods
Method: call ((component function) env)
Generic Function: to-app (component)
Package

lack.component.

Source

src/component.lisp.

Methods
Method: to-app ((component lack-component))
Method: to-app (component)

6.1.4 Classes

Class: lack-component
Package

lack.component.

Source

src/component.lisp.

Direct methods

to-app.


6.2 Internals


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6.2.1 Special variables

Special Variable: *isaac-ctx*
Package

lack.util.

Source

src/util.lisp.


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6.2.2 Ordinary functions

Function: clack-middleware-symbol-p (symbol)
Package

lack.builder.

Source

builder.lisp.

Function: convert-to-middleware-form (mw)
Package

lack.builder.

Source

builder.lisp.

Function: load-with-quicklisp (system)
Package

lack.util.

Source

src/util.lisp.

Function: locate-symbol (symbol pkg)
Package

lack.util.

Source

src/util.lisp.


Appendix A Indexes


Next: , Previous: , Up: Indexes   [Contents][Index]

A.1 Concepts


Next: , Previous: , Up: Indexes   [Contents][Index]

A.2 Functions

Jump to:   B   C   F   G   L   M   T  
Index Entry  Section

B
builder: Public macros

C
call: Public generic functions
call: Public generic functions
clack-middleware-symbol-p: Private ordinary functions
content-length: Public ordinary functions
convert-to-middleware-form: Private ordinary functions

F
find-middleware: Public ordinary functions
find-package-or-load: Public ordinary functions
funcall-with-cb: Public ordinary functions
Function, clack-middleware-symbol-p: Private ordinary functions
Function, content-length: Public ordinary functions
Function, convert-to-middleware-form: Private ordinary functions
Function, find-middleware: Public ordinary functions
Function, find-package-or-load: Public ordinary functions
Function, funcall-with-cb: Public ordinary functions
Function, generate-random-id: Public ordinary functions
Function, load-with-quicklisp: Private ordinary functions
Function, locate-symbol: Private ordinary functions

G
generate-random-id: Public ordinary functions
Generic Function, call: Public generic functions
Generic Function, to-app: Public generic functions

L
load-with-quicklisp: Private ordinary functions
locate-symbol: Private ordinary functions

M
Macro, builder: Public macros
Method, call: Public generic functions
Method, to-app: Public generic functions
Method, to-app: Public generic functions

T
to-app: Public generic functions
to-app: Public generic functions
to-app: Public generic functions

Jump to:   B   C   F   G   L   M   T  

Next: , Previous: , Up: Indexes   [Contents][Index]

A.3 Variables

Jump to:   *  
S  
Index Entry  Section

*
*isaac-ctx*: Private special variables

S
Special Variable, *isaac-ctx*: Private special variables

Jump to:   *  
S  

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A.4 Data types

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B
builder.lisp: The lack/src/builder․lisp file

C
Class, lack-component: Public classes

F
File, builder.lisp: The lack/src/builder․lisp file
File, lack-component.asd: The lack-component/lack-component․asd file
File, lack-util.asd: The lack-util/lack-util․asd file
File, lack.asd: The lack/lack․asd file
File, lack.lisp: The lack/src/lack․lisp file
File, src/component.lisp: The lack-component/src/component․lisp file
File, src/util.lisp: The lack-util/src/util․lisp file

L
lack: The lack system
lack: The lack package
lack-asd: The lack-asd package
lack-component: The lack-component system
lack-component: Public classes
lack-component-asd: The lack-component-asd package
lack-component.asd: The lack-component/lack-component․asd file
lack-util: The lack-util system
lack-util-asd: The lack-util-asd package
lack-util.asd: The lack-util/lack-util․asd file
lack.asd: The lack/lack․asd file
lack.builder: The lack․builder package
lack.component: The lack․component package
lack.lisp: The lack/src/lack․lisp file
lack.util: The lack․util package

M
Module, src: The lack/src module

P
Package, lack: The lack package
Package, lack-asd: The lack-asd package
Package, lack-component-asd: The lack-component-asd package
Package, lack-util-asd: The lack-util-asd package
Package, lack.builder: The lack․builder package
Package, lack.component: The lack․component package
Package, lack.util: The lack․util package

S
src: The lack/src module
src/component.lisp: The lack-component/src/component․lisp file
src/util.lisp: The lack-util/src/util․lisp file
System, lack: The lack system
System, lack-component: The lack-component system
System, lack-util: The lack-util system

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