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  ANSI Common Lisp   12 Numbers   12.2 Dictionary of Numbers

12.2.51 upgraded-complex-part-type Function

upgraded-complex-part-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 and current global environment.

upgraded-typespec - a type specifier.

upgraded-complex-part-type returns the part type of the most specialized complex number representation that can hold parts of type typespec.

The typespec is a subtype of (and possibly type equivalent to) the upgraded-typespec.

The purpose of upgraded-complex-part-type is to reveal how an implementation does its upgrading.

See Also:
complex (function and type)


Allegro CL Implementation Details:

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