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  ANSI Common Lisp   3 Evaluation and Compilation   3.2 Compilation   3.2.2 Compilation Semantics Semantic Constraints

All conforming programs must obey the following constraints, which are designed to minimize the observable differences between compiled and interpreted programs:

Conforming programs should not be written using any additional assumptions about consistency between the run-time environment and the startup, evaluation, and compilation environments.

Except where noted, when a compile-time and a run-time definition are different, one of the following occurs at run time:

  • an error of type error is signaled
  • the compile-time definition prevails
  • the run-time definition prevails

If the compiler processes a function form whose operator is not defined at compile time, no error is signaled at compile time.

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