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19.10 Equality predicates
These C functions mirror Scheme's equality 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, (equal? ...)
maps to
gh_equal_p(...)
.
int gh_eq_p (SCM x, SCM y)

Function 
Returns 1 if x and y are equal in the sense of Scheme's
eq? predicate, 0 otherwise.

int gh_eqv_p (SCM x, SCM y)

Function 
Returns 1 if x and y are equal in the sense of Scheme's
eqv? predicate, 0 otherwise.

int gh_equal_p (SCM x, SCM y)

Function 
Returns 1 if x and y are equal in the sense of Scheme's
equal? predicate, 0 otherwise.

int gh_string_equal_p (SCM s1, SCM s2)

Function 
Returns 1 if the strings s1 and s2 are equal, 0 otherwise.

int gh_null_p (SCM l)

Function 
Returns 1 if l is an empty list or pair; 0 otherwise.
