diff --git a/bare-arm/mpconfigport.h b/bare-arm/mpconfigport.h
index 7b8f8168b39cff29dcb6ecda93b4b4081911b101..41fe5dacef637767dd37a764bee294b5be655d3e 100644
--- a/bare-arm/mpconfigport.h
+++ b/bare-arm/mpconfigport.h
@@ -27,6 +27,7 @@
#define MICROPY_PY___FILE__ (0)
#define MICROPY_PY_GC (0)
#define MICROPY_PY_ARRAY (0)
+#define MICROPY_PY_ATTRTUPLE (0)
#define MICROPY_PY_COLLECTIONS (0)
#define MICROPY_PY_MATH (0)
#define MICROPY_PY_CMATH (0)
diff --git a/minimal/mpconfigport.h b/minimal/mpconfigport.h
index b08bdf8b7d740df83b5358eb945036bb17aab7a4..ef4fc00b4050ce1efdc64ac6ba9888a4628f7d23 100644
--- a/minimal/mpconfigport.h
+++ b/minimal/mpconfigport.h
@@ -30,6 +30,7 @@
#define MICROPY_PY___FILE__ (0)
#define MICROPY_PY_GC (0)
#define MICROPY_PY_ARRAY (0)
+#define MICROPY_PY_ATTRTUPLE (0)
#define MICROPY_PY_COLLECTIONS (0)
#define MICROPY_PY_MATH (0)
#define MICROPY_PY_CMATH (0)
diff --git a/py/mpconfig.h b/py/mpconfig.h
index a403a66633b3e50ca03d9c4e821a124249995358..df18290a20c1a62b13762f1d7971fd3cff53ed99 100644
--- a/py/mpconfig.h
+++ b/py/mpconfig.h
@@ -502,6 +502,12 @@ typedef double mp_float_t;
#define MICROPY_PY_ARRAY_SLICE_ASSIGN (0)
#endif
+// Whether to support attrtuple type (MicroPython extension)
+// It provides space-efficient tuples with attribute access
+#ifndef MICROPY_PY_ATTRTUPLE
+#define MICROPY_PY_ATTRTUPLE (1)
+#endif
+
// Whether to provide "collections" module
#ifndef MICROPY_PY_COLLECTIONS
#define MICROPY_PY_COLLECTIONS (1)
diff --git a/py/objattrtuple.c b/py/objattrtuple.c
new file mode 100644
index 0000000000000000000000000000000000000000..223c4c5810e3222e3f8cc39e03abab5c7585b25d
--- /dev/null
+++ b/py/objattrtuple.c
@@ -0,0 +1,94 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/objtuple.h"
+
+#if MICROPY_PY_ATTRTUPLE || MICROPY_PY_COLLECTIONS
+
+// this helper function is used by collections.namedtuple
+#if !MICROPY_PY_COLLECTIONS
+STATIC
+#endif
+void mp_obj_attrtuple_print_helper(const mp_print_t *print, const qstr *fields, mp_obj_tuple_t *o) {
+ mp_print_str(print, "(");
+ for (mp_uint_t i = 0; i < o->len; i++) {
+ if (i > 0) {
+ mp_print_str(print, ", ");
+ }
+ mp_printf(print, "%q=", fields[i]);
+ mp_obj_print_helper(print, o->items[i], PRINT_REPR);
+ }
+ mp_print_str(print, ")");
+}
+
+#endif
+
+#if MICROPY_PY_ATTRTUPLE
+
+STATIC void mp_obj_attrtuple_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
+ (void)kind;
+ mp_obj_tuple_t *o = o_in;
+ const qstr *fields = (const qstr*)o->items[o->len];
+ mp_obj_attrtuple_print_helper(print, fields, o);
+}
+
+STATIC void mp_obj_attrtuple_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
+ if (dest[0] == MP_OBJ_NULL) {
+ // load attribute
+ mp_obj_tuple_t *self = self_in;
+ mp_uint_t len = self->len;
+ const qstr *fields = (const qstr*)self->items[len];
+ for (mp_uint_t i = 0; i < len; i++) {
+ if (fields[i] == attr) {
+ dest[0] = self->items[i];
+ return;
+ }
+ }
+ }
+}
+
+mp_obj_t mp_obj_new_attrtuple(const qstr *fields, mp_uint_t n, const mp_obj_t *items) {
+ mp_obj_tuple_t *o = mp_obj_new_tuple(n + 1, NULL);
+ o->base.type = &mp_type_attrtuple;
+ for (mp_uint_t i = 0; i < n; i++) {
+ o->items[i] = items[i];
+ }
+ o->items[n] = (void*)fields;
+ return o;
+}
+
+const mp_obj_type_t mp_type_attrtuple = {
+ { &mp_type_type },
+ .name = MP_QSTR_tuple, // reuse tuple to save on a qstr
+ .print = mp_obj_attrtuple_print,
+ .unary_op = mp_obj_tuple_unary_op,
+ .binary_op = mp_obj_tuple_binary_op,
+ .attr = mp_obj_attrtuple_attr,
+ .subscr = mp_obj_tuple_subscr,
+ .getiter = mp_obj_tuple_getiter,
+};
+
+#endif // MICROPY_PY_ATTRTUPLE
diff --git a/py/objnamedtuple.c b/py/objnamedtuple.c
index 0d14635447d0791d05ba510d7ac77c4df6908627..59678afe3ac40185c10123098025c7322bbe5262 100644
--- a/py/objnamedtuple.c
+++ b/py/objnamedtuple.c
@@ -56,16 +56,9 @@ STATIC mp_uint_t namedtuple_find_field(mp_obj_namedtuple_type_t *type, qstr name
STATIC void namedtuple_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_namedtuple_t *o = o_in;
- mp_printf(print, "%q(", o->tuple.base.type->name);
+ mp_printf(print, "%q", o->tuple.base.type->name);
const qstr *fields = ((mp_obj_namedtuple_type_t*)o->tuple.base.type)->fields;
- for (mp_uint_t i = 0; i < o->tuple.len; i++) {
- if (i > 0) {
- mp_print_str(print, ", ");
- }
- mp_printf(print, "%q=", fields[i]);
- mp_obj_print_helper(print, o->tuple.items[i], PRINT_REPR);
- }
- mp_print_str(print, ")");
+ mp_obj_attrtuple_print_helper(print, fields, &o->tuple);
}
STATIC void namedtuple_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
diff --git a/py/objtuple.h b/py/objtuple.h
index 5fb82ba529b500994f5aaca8a61f630d7c185c60..8c4d41ed32e89b82a0068cb843c034a796e85500 100644
--- a/py/objtuple.h
+++ b/py/objtuple.h
@@ -40,4 +40,19 @@ mp_obj_t mp_obj_tuple_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs);
mp_obj_t mp_obj_tuple_subscr(mp_obj_t base, mp_obj_t index, mp_obj_t value);
mp_obj_t mp_obj_tuple_getiter(mp_obj_t o_in);
+extern const mp_obj_type_t mp_type_attrtuple;
+
+#define MP_DEFINE_ATTRTUPLE(tuple_obj_name, fields, nitems, ...) \
+ const mp_obj_tuple_t tuple_obj_name = { \
+ .base = {&mp_type_attrtuple}, \
+ .len = nitems, \
+ .items = { __VA_ARGS__ , (void*)fields } \
+ }
+
+#if MICROPY_PY_COLLECTIONS
+void mp_obj_attrtuple_print_helper(const mp_print_t *print, const qstr *fields, mp_obj_tuple_t *o);
+#endif
+
+mp_obj_t mp_obj_new_attrtuple(const qstr *fields, mp_uint_t n, const mp_obj_t *items);
+
#endif // __MICROPY_INCLUDED_PY_OBJTUPLE_H__
diff --git a/py/py.mk b/py/py.mk
index 98c60411561b3f71671a48485a636f80f668dbc3..8960fa4b427e0bb6f3efb1dc3f031173bea44afd 100644
--- a/py/py.mk
+++ b/py/py.mk
@@ -55,6 +55,7 @@ PY_O_BASENAME = \
map.o \
obj.o \
objarray.o \
+ objattrtuple.o \
objbool.o \
objboundmeth.o \
objcell.o \