py: Remove unnecessary BINARY_OP_EQUAL code that just checks pointers.

Previous patch c38dc3ccc76d1a9bf867704f43ea5d15da3fea7b allowed any
object to be compared with any other, using pointer comparison for a
fallback.  As such, existing code which checked for this case is no
longer needed.

py/obj.h

@@ -81,7 +81,7 @@ typedef struct _mp_obj_base_t mp_obj_base_t;
 #define MP_OBJ_IS_INT(o) (MP_OBJ_IS_SMALL_INT(o) || MP_OBJ_IS_TYPE(o, &mp_type_int))
 #define MP_OBJ_IS_STR(o) (MP_OBJ_IS_QSTR(o) || MP_OBJ_IS_TYPE(o, &mp_type_str))
 #define MP_OBJ_IS_STR_OR_BYTES(o) (MP_OBJ_IS_QSTR(o) || (MP_OBJ_IS_OBJ(o) && ((mp_obj_base_t*)(o))->type->binary_op == mp_obj_str_binary_op))
-#define MP_OBJ_IS_FUN(o) (MP_OBJ_IS_OBJ(o) && (((mp_obj_base_t*)(o))->type->binary_op == mp_obj_fun_binary_op))
+#define MP_OBJ_IS_FUN(o) (MP_OBJ_IS_OBJ(o) && (((mp_obj_base_t*)(o))->type->name == MP_QSTR_function))
 
 #define MP_OBJ_SMALL_INT_VALUE(o) (((mp_int_t)(o)) >> 1)
 #define MP_OBJ_NEW_SMALL_INT(small_int) ((mp_obj_t)((((mp_int_t)(small_int)) << 1) | 1))
@@ -568,7 +568,6 @@ typedef struct _mp_obj_fun_builtin_t { // use this to make const objects that go
     void *fun; // must be a pointer to a callable function in ROM
 } mp_obj_fun_builtin_t;
 
-mp_obj_t mp_obj_fun_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in);
 const char *mp_obj_fun_get_name(mp_const_obj_t fun);
 const char *mp_obj_code_get_name(const byte *code_info);
 

py/objfun.c

@@ -43,17 +43,9 @@
 #define DEBUG_printf(...) (void)0
 #endif
 
-// This binary_op method is used for all function types, and is also
-// used to determine if an object is of generic function type.
-mp_obj_t mp_obj_fun_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
-    switch (op) {
-        case MP_BINARY_OP_EQUAL:
-            // These objects can be equal only if it's the same underlying structure,
-            // we don't even need to check for 2nd arg type.
-            return MP_BOOL(lhs_in == rhs_in);
-    }
-    return MP_OBJ_NULL; // op not supported
-}
+// Note: the "name" entry in mp_obj_type_t for a function type must be
+// MP_QSTR_function because it is used to determine if an object is of generic
+// function type.
 
 /******************************************************************************/
 /* builtin functions                                                          */
@@ -109,7 +101,6 @@ const mp_obj_type_t mp_type_fun_builtin = {
     { &mp_type_type },
     .name = MP_QSTR_function,
     .call = fun_builtin_call,
-    .binary_op = mp_obj_fun_binary_op,
 };
 
 /******************************************************************************/
@@ -264,7 +255,6 @@ const mp_obj_type_t mp_type_fun_bc = {
     .print = fun_bc_print,
 #endif
     .call = fun_bc_call,
-    .binary_op = mp_obj_fun_binary_op,
 };
 
 mp_obj_t mp_obj_new_fun_bc(mp_uint_t scope_flags, mp_uint_t n_pos_args, mp_uint_t n_kwonly_args, mp_obj_t def_args_in, mp_obj_t def_kw_args, const byte *code) {
@@ -345,7 +335,6 @@ STATIC const mp_obj_type_t mp_type_fun_native = {
     { &mp_type_type },
     .name = MP_QSTR_function,
     .call = fun_native_call,
-    .binary_op = mp_obj_fun_binary_op,
 };
 
 mp_obj_t mp_obj_new_fun_native(mp_uint_t n_args, void *fun_data) {
@@ -404,7 +393,6 @@ STATIC const mp_obj_type_t mp_type_fun_viper = {
     { &mp_type_type },
     .name = MP_QSTR_function,
     .call = fun_viper_call,
-    .binary_op = mp_obj_fun_binary_op,
 };
 
 mp_obj_t mp_obj_new_fun_viper(mp_uint_t n_args, void *fun_data, mp_uint_t type_sig) {
@@ -515,7 +503,6 @@ STATIC const mp_obj_type_t mp_type_fun_asm = {
     { &mp_type_type },
     .name = MP_QSTR_function,
     .call = fun_asm_call,
-    .binary_op = mp_obj_fun_binary_op,
 };
 
 mp_obj_t mp_obj_new_fun_asm(mp_uint_t n_args, void *fun_data) {

py/objstr.c

@@ -348,16 +348,12 @@ mp_obj_t mp_obj_str_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
     } else if (lhs_type == &mp_type_bytes) {
         mp_buffer_info_t bufinfo;
         if (!mp_get_buffer(rhs_in, &bufinfo, MP_BUFFER_READ)) {
-            goto incompatible;
+            return MP_OBJ_NULL; // op not supported
         }
         rhs_data = bufinfo.buf;
         rhs_len = bufinfo.len;
     } else {
         // incompatible types
-    incompatible:
-        if (op == MP_BINARY_OP_EQUAL) {
-            return mp_const_false; // can check for equality against every type
-        }
         return MP_OBJ_NULL; // op not supported
     }
 

py/objtype.c

@@ -762,18 +762,6 @@ STATIC bool type_store_attr(mp_obj_t self_in, qstr attr, mp_obj_t value) {
     return false;
 }
 
-STATIC mp_obj_t type_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
-    switch (op) {
-        case MP_BINARY_OP_EQUAL:
-            // Types can be equal only if it's the same type structure,
-            // we don't even need to check for 2nd arg type.
-            return MP_BOOL(lhs_in == rhs_in);
-
-        default:
-            return MP_OBJ_NULL; // op not supported
-    }
-}
-
 const mp_obj_type_t mp_type_type = {
     { &mp_type_type },
     .name = MP_QSTR_type,
@@ -782,7 +770,6 @@ const mp_obj_type_t mp_type_type = {
     .call = type_call,
     .load_attr = type_load_attr,
     .store_attr = type_store_attr,
-    .binary_op = type_binary_op,
 };
 
 mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict) {