in-package (ANSI and GNU Common Lisp Document)

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#### 11.2.16 in-package [Macro]

`in-package` name ⇒ package

#### Arguments and Values::

name—a string designator; not evaluated.

package—the package named by name.

#### Description::

Causes the the package named by name to become the current package—that is, the value of *package*. If no such package already exists, an error of type package-error is signaled.

Everything in-package does is also performed at compile time if the call appears as a top level form.

#### Side Effects::

The variable *package* is assigned. If the in-package form is a top level form, this assignment also occurs at compile time.

#### Exceptional Situations::

An error of type package-error is signaled if the specified package does not exist.

#### See Also::

package