5.22.10 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.