Home packages. One of the invariants that Common Lisp tries to maintain is a property called. print-read consistency. 5. Export and Use-package. Suppose Jane and Bob are collaborating on a software development project, each. working in their own package to avoid conflicts. 6. Shadowing. Packages in Common Lisp, a tutorial. Francis Sergeraert. January 1 Introduction. It is not possible to seriously program without using identi ers, allowing the pro- grammer to locate, process and modify various datas in a convenient way, with names more or less descriptive, pointing to the data, depending in some way on the context. These operations are make-package, in-package, shadow, shadowing-import, export, unexport, use-package, unuse-package, and import. To guarantee proper compilation in all Common Lisp implementations, these functions should appear only at top level within a file. As a matter of style, it is suggested that each file contain only one package.

In package common lisp

In addition to FrédéricHamidi's comment, note that there's already an abs function defined in Common Lisp. You can't redefine it. You can't redefine it. Either use a . foo is the syntax for a keyword symbol, and #:foo is the syntax for an uninterned symbol. When a symbol is used primarily to get at the string that is its name (as in defpackage and in-package), I prefer to use uninterned symbols.. Here are the other options: use a keyword symbol; I don't like how this interns keyword symbols that show up in apropos and other places. The package common-lisp and SBCL internal implementation packages are locked by default, including sb-ext. In addition, any user-defined package can be declared to be locked so that it cannot be modified by the user. Packages in Common Lisp, a tutorial. Francis Sergeraert. January 1 Introduction. It is not possible to seriously program without using identi ers, allowing the pro- grammer to locate, process and modify various datas in a convenient way, with names more or less descriptive, pointing to the data, depending in some way on the context. LISP - Packages. The current package is referred by the special variable *package*. There are two predefined packages in LISP − common-lisp − it contains symbols for all the functions and variables defined. common-lisp-user − it uses the common-lisp package and all other packages with editing and debugging tools; it is called cl-user in short.Common Lisp addresses this problem through the package system, derived from an earlier package system developed for Lisp Machine Lisp [55]. In addition to. use-package packages-to-use &optional package => t. Arguments and Values: packages-to-usea designator for a list of package designators. The KEYWORD . Common Lisp provides some macros to iterate through the symbols of a package . The two most interesting are: DO-SYMBOLS and DO-EXTERNAL-SYMBOLS. Common Lisp provides a language mechanism called packages for segregating namespaces. Here's an example of how packages work:? (make-package:bob). On the way to resume the development of Ulquikit, I needed a way to retrieve all functions from a package so that a Ulquikit command could be.

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