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15.25 Loop

X3J13 voted in January 1989 (LOOP-FACILITY) to adopt an extended definition of the loop macro as a part of the forthcoming draft Common Lisp standard. This chapter presents the bulk of the Common Lisp Loop Facility proposal, written by Jon L White.

• Introduction
• How the Loop Facility Works
• Parsing Loop Clauses
• User Extensibility
• Loop Constructs
• Iteration Control
• End-Test Control
• Value Accumulation
• Variable Initializations
• Conditional Execution
• Unconditional Execution
• Miscellaneous Features