add jl_is_nothing predicate

Julia C API is lacking in a predicate to check if a given value is nothing or not. This commit includes the predicate in C macro.
alyst · Mar 17, 2014 · 3852357 · 3852357
1 parent 213b4b3
commit 3852357
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/julia.h b/src/julia.h
@@ -488,6 +488,7 @@ extern jl_sym_t *boundscheck_sym; extern jl_sym_t *copyast_sym;
 // basic predicates -----------------------------------------------------------
 
 #define jl_is_null(v)        (((jl_value_t*)(v)) == ((jl_value_t*)jl_null))
+#define jl_is_nothing(v)     (((jl_value_t*)(v)) == ((jl_value_t*)jl_nothing))
 #define jl_is_tuple(v)       jl_typeis(v,jl_tuple_type)
 #define jl_is_datatype(v)    jl_typeis(v,jl_datatype_type)
 #define jl_is_pointerfree(t) (((jl_datatype_t*)t)->pointerfree)