Standard Types

These are the standard simple types:

 

• scheme_char_type --  SCHEME_CHAR_VAL extracts the character; test for this type with  SCHEME_CHARP
• scheme_integer_type -- fixnum integers;  SCHEME_INT_VAL extracts the integer; test for this type with  SCHEME_INTP
• scheme_double_type -- flonum inexact numbers;  SCHEME_DBL_VAL extracts the floating-point value; test for this type with  SCHEME_DBLP
• scheme_string_type --  SCHEME_STR_VAL extracts the string and
• scheme_bignum_type -- test for this type with  SCHEME_BIGNUMP
• scheme_rational_type -- test for this type with  SCHEME_RATIONALP
• scheme_complex_type -- test for this type with  SCHEME_COMPLEXP  SCHEME_STRLEN_VAL extracts the string length; test for this type with  SCHEME_STRINGP
• scheme_symbol_type --  SCHEME_SYM_VAL extracts the string (the Scheme string is modified if this string is modified); test for this type with  SCHEME_SYMBOLP
• scheme_box_type --  SCHEME_PTR_VAL extracts/sets the boxed value; test for this type with  SCHEME_BOXP
• scheme_pair_type --  SCHEME_CAR extracts/sets the  car and  SCHEME_CDR extracts/sets the  cdr; test for this type with  SCHEME_PAIRP
• scheme_vector_type --  SCHEME_VEC_SIZE extracts the length and  SCHEME_VEC_ELS extracts the array (the Scheme array is modified if this array is modified); test for this type with  SCHEME_VECTORP
• scheme_type_symbol_type --  SCHEME_TSYM_VAL extracts the string; test for this type with  SCHEME_TSYMBOLP
• scheme_object_type --  SCHEME_OBJ_CLASS extracts the class,  SCHEME_OBJ_DATA extracts/sets the user pointer, and  SCHEME_OBJ_FLAG extracts/sets the flag; test for this type with  SCHEME_OBJP
• scheme_class_type -- test for this type with  SCHEME_CLASSP
• scheme_structure_type -- test for this type with  SCHEME_STRUCTP
• scheme_struct_type_type -- test for this type with  SCHEME_STRUCT_TYPEP
• scheme_functor_type -- test for this type with  SCHEME_FUNCTORP
• scheme_input_port_type --  SCHEME_INPORT_VAL extracts/sets the user data pointer; test for this type with  SCHEME_INPORTP
• scheme_output_port_type --  SCHEME_OUTPORT_VAL extracts/sets the user data pointer; test for this type with  SCHEME_OUTPORTP
• scheme_promise_type -- test for this type with  SCHEME_PROMP
• scheme_process_type -- (threads) test for this type with  SCHEME_PROCESSP
• scheme_sema_type -- (semaphores) test for this type with  SCHEME_SEMAP
• scheme_hash_table_type -- test for this type with  SCHEME_HASHTP
• scheme_weak_box_type -- test for this type with  SCHEME_WEAKP;  SCHEME_WEAK_PTR extracts the pointer
• scheme_generic_data_type -- test for this type with  SCHEME_GENDATAP

The predicates  SCHEME_NUMBERP returns TRUE for all numerical types;  SCHEME_REALP returns TRUE for all non-complex numerical types.  SCHEME_NUM_VAL extracts a fixnum or a fixnum approximation for a flonum (an error is raised if there is no acceptable approximation).

These are the procedure types:

 

• scheme_prim_type -- a primitive procedure
• scheme_closed_prim_type -- a primitive procedure with a data pointer
• scheme_compiled_closure_type -- a Scheme procedure
• scheme_cont_type -- a continuation
• scheme_escaping_cont_type -- an escaping continuation
• scheme_struct_proc_type -- a structure function (created by  define-struct or  let-struct)
• scheme_case_closure_type -- a  case-lambda procedure

The macro  SCHEME_PROCP returns 1 for all procedure types and 0 for anything else.

These types are used only by syntax extenders:

• scheme_variable_type -- location of a global variable
• scheme_variable_reference_type -- unlinked reference to a global variable
• scheme_static_distance_type -- locaiton of a local variable
• scheme_static_distance_unbox_type -- locaiton of an indirect local variable
• scheme_compiled_syntax_type -- A syntax resolver