Function ed

Syntax:

Arguments and Values:

x—nil, a pathname, a string, or a function name. The default is nil.

Description:

25.3.0 17ed invokes the editor if the implementation provides a resident editor.

25.3.0 18If x is nil, the editor is entered. If the editor had been previously entered, its prior state is resumed, if possible.

25.3.0 19If x is a pathname or string, it is taken as the pathname designator for a file to be edited.

25.3.0 20If x is a function name, the text of its definition is edited. The means by which the function text is obtained is implementation-defined.

Examples:

None.

Affected By:

None.

Exceptional Situations:

I changed this from "implicitly vague" to "explicitly vauge" since CLtL doesn't say and since Sandra felt this should be explicit. -kmp 9-Jan-92The consequences are undefined if the implementation does not provide a resident editor.

Might signal type-error if its argument is supplied but is not a symbol, a pathname, or nil.

If a failure occurs when performing some operation on the file system while attempting to edit a file, an error of type file-error is signaled.

An error of type file-error might be signaled if x is a designator for a wild pathname.

Implementation-dependent additional conditions might be signaled as well.

See Also:

pathname, logical-pathname, compile-file, load, Section 19.1.2 (Pathnames as Filenames)

Notes:

None.