(doc-group type  «Dealing with types.») (defdoc (const? term)  «Return `T` if the term refers to a constant, `NIL` otherwise.    Constants cannot be modified with `set!`.  Trying to do so will result   in an exception.»  :doc-example  «(const? 12345) ; a number   ; ↳ T»  :doc-example  «(const? 'const?) ; a function   ; ↳ NIL»  :doc-example  «(const? 'pi) ; a mathematical constant   ; ↳ T»  :doc-group type) (defdoc (bignum? v)  «Return `T` if the argument is a bignum, `NIL` otherwise.»  :doc-group type  :doc-group number  :doc-see bignum) (defdoc (int? v)  «Return `T` if the argument is an integer, `NIL` otherwise.»  :doc-group type  :doc-group number  :doc-see int-valued?) (defdoc (str? v)  «Return `T` if the argument is a string, `NIL` otherwise.»  :doc-group type  :doc-see str  :doc-see str-utf8?) (defdoc (gensym? v)  «Return `T` if the argument is a gensym, `NIL` otherwise.»  :doc-group type  :doc-see sym?  :doc-see sym) (defdoc (ptr? v)  «Return `T` if the argument is an abstract pointer, `NIL` otherwise.»  :doc-group type  :doc-group number  :doc-see ptr) (defdoc (table? v)  «Return `T` if the argument is a table, `NIL` otherwise.»  :doc-group type  :doc-group table  :doc-see table) (defdoc (keyword? v)  «Return `T` if the argument is a keyword, `NIL` otherwise.»  :doc-group type) (defdoc (type-of v)  «Return the underlying type of the value.»  :doc-example  «(type-of 1)   ; ↳ fixnum»  :doc-example  «(type-of NIL)   ; ↳ null»  :doc-example  «(type-of T)   ; ↳ bool»  :doc-example  «(type-of "hello")   ; ↳ str»  :doc-example  «(type-of (arr 'u32 0 1 2))   ; ↳ (arr u32)»  :doc-group type  :doc-see size-of)