(guile.info.gz) Procedures

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 18.2.5.3 Procedures
 ...................
 
 Guile provides two kinds of procedures: "closures", which are the
 result of evaluating a `lambda' expression, and "subrs", which are C
 functions packaged up as Scheme objects, to make them available to
 Scheme programmers.
 
    (There are actually other sorts of procedures: compiled closures, and
 continuations; see the source code for details about them.)
 
  -- Function: SCM scm_procedure_p (SCM X)
      Return `SCM_BOOL_T' iff X is a Scheme procedure object, of any
      sort.  Otherwise, return `SCM_BOOL_F'.
 

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