(guile.info.gz) Type predicates

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 19.9 Type predicates
 ====================
 
 These C functions mirror Scheme's type predicate procedures with one
 important difference.  The C routines return C boolean values (0 and 1)
 instead of `SCM_BOOL_T' and `SCM_BOOL_F'.
 
    The Scheme notational convention of putting a `?' at the end of
 predicate procedure names is mirrored in C by placing `_p' at the end
 of the procedure.  For example, `(pair? ...)' maps to `gh_pair_p(...)'.
 
  -- Function: int gh_boolean_p (SCM VAL)
      Returns 1 if VAL is a boolean, 0 otherwise.
 
  -- Function: int gh_symbol_p (SCM VAL)
      Returns 1 if VAL is a symbol, 0 otherwise.
 
  -- Function: int gh_char_p (SCM VAL)
      Returns 1 if VAL is a char, 0 otherwise.
 
  -- Function: int gh_vector_p (SCM VAL)
      Returns 1 if VAL is a vector, 0 otherwise.
 
  -- Function: int gh_pair_p (SCM VAL)
      Returns 1 if VAL is a pair, 0 otherwise.
 
  -- Function: int gh_procedure_p (SCM VAL)
      Returns 1 if VAL is a procedure, 0 otherwise.
 
  -- Function: int gh_list_p (SCM VAL)
      Returns 1 if VAL is a list, 0 otherwise.
 
  -- Function: int gh_inexact_p (SCM VAL)
      Returns 1 if VAL is an inexact number, 0 otherwise.
 
  -- Function: int gh_exact_p (SCM VAL)
      Returns 1 if VAL is an exact number, 0 otherwise.
 

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(guile.info.gz) Equality predicates