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6 Iteration  6.1 The LOOP Facility 6.1.2 Variable Initialization and Stepping Clauses 6.1.2.1 Iteration Control
6.1.2.1.7 The for-as-package subclause
In the for-as-package subclause
the for
or as construct
iterates over the symbols in a package.
In this syntax, a compound preposition is used to designate access to a
package.
The variable var takes on the value of each symbol
in the supplied package.
The following loop keywords serve as valid prepositions within this syntax:
- being
The keyword being introduces either the Loop schema
symbol, present-symbol, or external-symbol.
- each, the
The loop keyword each
follows the loop keyword being when symbol,
present-symbol, or external-symbol is used.
The loop keyword the is used with symbols,
present-symbols, and external-symbols only for ease of reading.
This agreement isn't required.
- present-symbol, present-symbols
These Loop schemas iterate over the symbols
that are present in a package.
The package to be iterated over is supplied in the same way
that package arguments to find-package are supplied.
If the package for the iteration is not supplied,
the current package is used.
If a package that does not exist is supplied,
an error of type package-error is signaled.
- symbol, symbols
These Loop schemas iterate over symbols that are
accessible in a given package.
The package to be iterated over is supplied in the same way
that package arguments to find-package are supplied.
If the package for the iteration is not supplied,
the current package is used.
If a package that does not exist is supplied,
an error of type package-error is signaled.
- external-symbol, external-symbols
These Loop schemas iterate over the external symbols of a package.
The package to be iterated over is supplied in the same way
that package arguments to find-package are supplied.
If the package for the iteration is not supplied,
the current package is used.
If a package that does not exist is supplied,
an error of type package-error is signaled.
- in, of
These loop prepositions introduce package.
In effect
being
{each | the}
{symbol |
symbols |
present-symbol |
present-symbols |
external-symbol |
external-symbols}
{in | of}
is a compound preposition.
Iteration stops when there are no more symbols to be referenced
in the supplied package.
6.1.2.1.7.1 Examples of for-as-package subclause
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