1 /* Native functions for introspection operations. 2 3 Copyright (C) 2016 Paul Boddie <paul@boddie.org.uk> 4 5 This program is free software; you can redistribute it and/or modify it under 6 the terms of the GNU General Public License as published by the Free Software 7 Foundation; either version 3 of the License, or (at your option) any later 8 version. 9 10 This program is distributed in the hope that it will be useful, but WITHOUT 11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 12 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more 13 details. 14 15 You should have received a copy of the GNU General Public License along with 16 this program. If not, see <http://www.gnu.org/licenses/>. 17 */ 18 19 #include "types.h" 20 #include "exceptions.h" 21 #include "ops.h" 22 #include "progconsts.h" 23 #include "progops.h" 24 #include "progtypes.h" 25 #include "main.h" 26 27 /* Introspection. */ 28 29 __attr __fn_native_introspection_object_getattr(__attr __args[]) 30 { 31 __attr * const obj = &__args[1]; 32 __attr * const name = &__args[2]; 33 __attr * const _default = &__args[3]; 34 35 /* NOTE: To be written. */ 36 return __builtins___none_None; 37 } 38 39 static int __issubclass(__ref obj, __attr cls) 40 { 41 return (__HASATTR(obj, __TYPEPOS(cls.value), __TYPECODE(cls.value))); 42 } 43 44 __attr __fn_native_introspection_isinstance(__attr __args[]) 45 { 46 __attr * const obj = &__args[1]; 47 __attr * const cls = &__args[2]; 48 49 /* cls must be a class. */ 50 if (__is_instance(obj->value) && __issubclass(__get_class(obj->value), *cls)) 51 return __builtins___boolean_True; 52 else 53 return __builtins___boolean_False; 54 } 55 56 __attr __fn_native_introspection_issubclass(__attr __args[]) 57 { 58 __attr * const obj = &__args[1]; 59 __attr * const cls = &__args[2]; 60 61 /* obj and cls must be classes. */ 62 if (__issubclass(obj->value, *cls)) 63 return __builtins___boolean_True; 64 else 65 return __builtins___boolean_False; 66 } 67 68 /* Module initialisation. */ 69 70 void __main_native_introspection() 71 { 72 }