upgraded-array-element-type
upgraded-array-element-type Function
Syntax:
upgraded-array-element-type typespec &optional environment → upgraded-typespec
Arguments and Values:
typespec—a type specifier .
environment—an environment object. The default is nil, denoting the null lexical environment and the current global environment.
upgraded-typespec—a type specifier .
Description:
Returns the element type of the most specialized array representation capable of holding items of the type denoted by typespec.
The typespec is a subtype of (and possibly type equivalent to) the upgraded-typespec.
If typespec is bit, the result is type equivalent to bit. If typespec is base-char, the result is type equivalent to base-char. If typespec is character, the result is type equivalent to character.
The purpose of upgraded-array-element-type is to reveal how an implementation does its upgrading.
The environment is used to expand any derived type specifiers that are mentioned in the typespec.
See Also:
array-element-type, make-array
Notes:
Except for storage allocation consequences and dealing correctly with the optional environment argument, upgraded-array-element-type could be defined as:
(defun upgraded-array-element-type (type &optional environment)
(array-element-type (make-array 0 :element-type type)))
Expanded Reference: upgraded-array-element-type
TODO: Please contribute to this page by adding explanations and examples
(upgraded-array-element-type )