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-rw-r--r--py/objstrunicode.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/py/objstrunicode.c b/py/objstrunicode.c
index d41e92db4a..8fbe81532a 100644
--- a/py/objstrunicode.c
+++ b/py/objstrunicode.c
@@ -100,6 +100,18 @@ STATIC void uni_print(void (*print)(void *env, const char *fmt, ...), void *env,
}
}
+STATIC mp_obj_t uni_unary_op(int op, mp_obj_t self_in) {
+ GET_STR_DATA_LEN(self_in, str_data, str_len);
+ switch (op) {
+ case MP_UNARY_OP_BOOL:
+ return MP_BOOL(str_len != 0);
+ case MP_UNARY_OP_LEN:
+ return MP_OBJ_NEW_SMALL_INT(unichar_charlen((const char *)str_data, str_len));
+ default:
+ return MP_OBJ_NULL; // op not supported
+ }
+}
+
STATIC mp_obj_t str_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
#if MICROPY_CPYTHON_COMPAT
if (n_kw != 0) {
@@ -297,6 +309,7 @@ const mp_obj_type_t mp_type_str = {
.name = MP_QSTR_str,
.print = uni_print,
.make_new = str_make_new,
+ .unary_op = uni_unary_op,
.binary_op = str_binary_op,
.subscr = str_subscr,
.getiter = mp_obj_new_str_iterator,