Implementation of "RFC: Change GMP bool cast behavior"

https://wiki.php.net/rfc/fix_up_bcmath_number_class

Author: SakiTakamachi

ext/gmp/gmp.c

@@ -298,6 +298,10 @@ static zend_result gmp_cast_object(zend_object *readobj, zval *writeobj, int typ
 			ZVAL_DOUBLE(writeobj, mpz_get_d(gmpnum));
 		}
 		return SUCCESS;
+	case _IS_BOOL:
+		gmpnum = GET_GMP_OBJECT_FROM_OBJ(readobj)->num;
+		ZVAL_BOOL(writeobj, mpz_sgn(gmpnum) != 0);
+		return SUCCESS;
 	default:
 		return FAILURE;
 	}

ext/gmp/tests/cast.phpt

@@ -12,11 +12,25 @@ var_dump((int) $n);
 var_dump((float) $n);
 var_dump((bool) $n);
 
+echo "\n";
+
+$zero = gmp_init(0);
+echo $zero, "\n";
+var_dump((string) $zero);
+var_dump((int) $zero);
+var_dump((float) $zero);
+var_dump((bool) $zero);
+
 ?>
 --EXPECTF--
 42
 string(2) "42"
 int(42)
 float(42)
+bool(true)
 
-Recoverable fatal error: Object of class GMP could not be converted to bool in %s on line %d
+0
+string(1) "0"
+int(0)
+float(0)
+bool(false)