mirror of https://github.com/python/cpython
* classobject.[ch], {float,long,int}object.c, bltinmodule.c:
coercion is now completely generic. * ceval.c: for instances, don't coerce for + and *; * reverses arguments if left one is non-instance numeric and right one sequence.
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70d7a310a9
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e6eefc2231
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@ -43,5 +43,4 @@ extern object *newinstancemethodobject PROTO((object *, object *));
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extern object *instancemethodgetfunc PROTO((object *));
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extern object *instancemethodgetself PROTO((object *));
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extern int instance_coerce PROTO((object **, object **));
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extern object *instance_convert PROTO((object *, char *));
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@ -142,6 +142,7 @@ typedef struct {
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object *(*nb_and) FPROTO((object *, object *));
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object *(*nb_xor) FPROTO((object *, object *));
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object *(*nb_or) FPROTO((object *, object *));
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int (*nb_coerce) FPROTO((object **, object **));
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} number_methods;
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typedef struct {
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@ -417,13 +417,19 @@ static object *
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instance_concat(inst, other)
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instanceobject *inst, *other;
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{
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object *func, *res;
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object *func, *arg, *res;
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func = instance_getattr(inst, "__add__");
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if (func == NULL)
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return NULL;
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res = call_object(func, (object *)other);
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arg = mkvalue("(O)", other);
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if (arg == NULL) {
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DECREF(func);
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return NULL;
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}
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res = call_object(func, arg);
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DECREF(func);
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DECREF(arg);
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return res;
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}
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@ -568,12 +574,18 @@ generic_binary_op(self, other, methodname)
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object *other;
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char *methodname;
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{
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object *func, *res;
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object *func, *arg, *res;
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if ((func = instance_getattr(self, methodname)) == NULL)
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return NULL;
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res = call_object(func, other);
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arg = mkvalue("O", other);
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if (arg == NULL) {
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DECREF(func);
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return NULL;
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}
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res = call_object(func, arg);
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DECREF(func);
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DECREF(arg);
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return res;
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}
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@ -653,6 +665,45 @@ BINARY(instance_and, "__and__")
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BINARY(instance_xor, "__xor__")
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BINARY(instance_or, "__or__")
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static int
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instance_coerce(pv, pw)
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object **pv, **pw;
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{
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object *v = *pv;
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object *w = *pw;
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object *func;
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object *res;
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int outcome;
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if (!is_instanceobject(v))
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return 1; /* XXX shouldn't be possible */
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func = instance_getattr((instanceobject *)v, "__coerce__");
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if (func == NULL) {
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err_clear();
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return 1;
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}
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res = call_object(func, w);
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if (res == NULL)
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return -1;
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if (res == None) {
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DECREF(res);
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return 1;
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}
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outcome = getargs(res, "(OO)", &v, &w);
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if (!outcome || v->ob_type != w->ob_type ||
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v->ob_type->tp_as_number == NULL) {
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DECREF(res);
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err_setstr(TypeError, "bad __coerce__ result");
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return -1;
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}
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INCREF(v);
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INCREF(w);
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DECREF(res);
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*pv = v;
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*pw = w;
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return 0;
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}
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static number_methods instance_as_number = {
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instance_add, /*nb_add*/
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instance_sub, /*nb_subtract*/
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@ -671,6 +722,7 @@ static number_methods instance_as_number = {
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instance_and, /*nb_and*/
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instance_xor, /*nb_xor*/
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instance_or, /*nb_or*/
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instance_coerce, /*nb_coerce*/
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};
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typeobject Instancetype = {
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@ -690,58 +742,6 @@ typeobject Instancetype = {
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&instance_as_mapping, /*tp_as_mapping*/
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};
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static int
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one_coerce(pv, pw)
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object **pv, **pw;
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{
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object *v = *pv;
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object *w = *pw;
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object *func;
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if (!is_instanceobject(v))
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return 1;
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func = instance_getattr((instanceobject *)v, "__coerce__");
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if (func == NULL) {
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err_clear();
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return 1;
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}
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if (func != NULL) {
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object *res = call_object(func, w);
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int outcome;
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if (res == NULL)
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return -1;
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outcome = getargs(res, "(OO)", &v, &w);
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if (!outcome || v->ob_type != w->ob_type ||
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v->ob_type->tp_as_number == NULL) {
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DECREF(res);
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err_setstr(TypeError, "bad __coerce__ result");
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return -1;
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}
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INCREF(v);
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INCREF(w);
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DECREF(res);
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*pv = v;
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*pw = w;
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return 0;
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}
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}
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int
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instance_coerce(pv, pw)
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object **pv, **pw;
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{
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int outcome;
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outcome = one_coerce(pv, pw);
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if (outcome > 0) {
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outcome = one_coerce(pw, pv);
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if (outcome > 0) {
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err_setstr(TypeError, "uncoerceable instance");
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outcome = -1;
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}
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}
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return outcome;
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}
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object *
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instance_convert(inst, methodname)
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object *inst;
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@ -299,6 +299,25 @@ float_nonzero(v)
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return v->ob_fval != 0.0;
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}
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int
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float_coerce(pv, pw)
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object **pv;
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object **pw;
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{
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if (is_intobject(*pw)) {
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long x = getintvalue(*pw);
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*pw = newfloatobject((double)x);
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INCREF(*pv);
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return 0;
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}
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else if (is_longobject(*pw)) {
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*pw = newfloatobject(dgetlongvalue(*pw));
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INCREF(*pv);
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return 0;
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}
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return 1; /* Can't do it */
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}
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static number_methods float_as_number = {
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float_add, /*nb_add*/
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float_sub, /*nb_subtract*/
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@ -317,6 +336,7 @@ static number_methods float_as_number = {
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0, /*nb_and*/
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0, /*nb_xor*/
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0, /*nb_or*/
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float_coerce, /*nb_coerce*/
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};
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typeobject Floattype = {
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@ -1253,6 +1253,19 @@ long_or(a, b)
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return long_bitwise(a, '|', b);
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}
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int
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long_coerce(pv, pw)
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object **pv;
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object **pw;
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{
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if (is_intobject(*pw)) {
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*pw = newlongobject(getintvalue(*pw));
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INCREF(*pv);
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return 0;
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}
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return 1; /* Can't do it */
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}
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#define UF (object* (*) FPROTO((object *))) /* Unary function */
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#define BF (object* (*) FPROTO((object *, object *))) /* Binary function */
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#define IF (int (*) FPROTO((object *))) /* Int function */
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@ -1275,6 +1288,8 @@ static number_methods long_as_number = {
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BF long_and, /*nb_and*/
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BF long_xor, /*nb_xor*/
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BF long_or, /*nb_or*/
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(int (*) FPROTO((object **, object **)))
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long_coerce, /*nb_coerce*/
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};
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typeobject Longtype = {
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@ -781,10 +781,7 @@ initbuiltin()
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Increment the reference count on each argument.
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Return -1 and raise an exception if no coercion is possible
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(and then no reference count is incremented).
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XXX This should be distributed over the various numeric types,
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XXX but for now I don't see how to implement that.
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XXX So, for now, if you add a new numeric type,
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XXX you must add to this function as well. */
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*/
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int
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coerce(pv, pw)
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@ -792,36 +789,23 @@ coerce(pv, pw)
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{
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register object *v = *pv;
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register object *w = *pw;
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int res;
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if (v->ob_type == w->ob_type) {
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INCREF(v);
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INCREF(w);
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return 0;
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}
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if (is_instanceobject(v) || is_instanceobject(w))
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return instance_coerce(pv, pw);
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if (v->ob_type->tp_as_number == NULL ||
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w->ob_type->tp_as_number == NULL) {
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err_setstr(TypeError, "mixing number and non-number");
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return -1;
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if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) {
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res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw);
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if (res <= 0)
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return res;
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}
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if (is_floatobject(v) || is_floatobject(w)) {
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v = builtin_float((object *)0, v);
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w = builtin_float((object *)0, w);
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if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) {
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res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv);
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if (res <= 0)
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return res;
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}
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else if (is_longobject(v) || is_longobject(w)) {
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v = builtin_long((object *)0, v);
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w = builtin_long((object *)0, w);
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}
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else {
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err_setstr(TypeError, "can't coerce numeric types?!?!?");
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return -1;
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}
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if (v == NULL || w == NULL) {
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XDECREF(v);
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XDECREF(w);
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return -1;
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}
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*pv = v;
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*pw = w;
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return 0;
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err_setstr(TypeError, "number coercion failed");
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return -1;
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}
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@ -1532,7 +1532,9 @@ static object *
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add(v, w)
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object *v, *w;
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{
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if (v->ob_type->tp_as_number != NULL) {
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if (v->ob_type->tp_as_sequence != NULL)
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return (*v->ob_type->tp_as_sequence->sq_concat)(v, w);
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else if (v->ob_type->tp_as_number != NULL) {
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object *x;
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if (coerce(&v, &w) != 0)
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return NULL;
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DECREF(w);
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return x;
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}
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else if (v->ob_type->tp_as_sequence != NULL)
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return (*v->ob_type->tp_as_sequence->sq_concat)(v, w);
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else {
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err_setstr(TypeError, "+ not supported by operands");
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return NULL;
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@ -1571,16 +1571,27 @@ mul(v, w)
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object *v, *w;
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{
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typeobject *tp;
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if (is_intobject(v) && w->ob_type->tp_as_sequence != NULL) {
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/* int*sequence -- swap v and w */
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tp = v->ob_type;
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if (tp->tp_as_number != NULL &&
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w->ob_type->tp_as_sequence != NULL &&
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!is_instanceobject(v)) {
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/* number*sequence -- swap v and w */
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object *tmp = v;
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v = w;
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w = tmp;
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tp = v->ob_type;
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}
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tp = v->ob_type;
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if (tp->tp_as_number != NULL) {
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object *x;
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if (coerce(&v, &w) != 0)
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if (is_instanceobject(v)) {
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/* Instances of user-defined classes get their
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other argument uncoerced, so they may
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implement sequence*number as well as
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number*number. */
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INCREF(v);
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INCREF(w);
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}
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else if (coerce(&v, &w) != 0)
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return NULL;
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x = (*v->ob_type->tp_as_number->nb_multiply)(v, w);
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DECREF(v);
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