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unix file: Implement context manager protocol (for "with" statement).

This commit is contained in:
Paul Sokolovsky 2014-04-03 16:42:25 +03:00
parent 98a627dc03
commit c61ce96590
2 changed files with 19 additions and 0 deletions
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12
tests/io/file-with.py Normal file
View File

@ -0,0 +1,12 @@
f = open("io/data/file1")
with f as f2:
print(f2.read())
# File should be closed
try:
f.read()
except:
# Note: CPython and us throw different exception trying to read from
# close file.
print("can't read file after with")

7
unix/file.c
View File

@ -49,6 +49,11 @@ static mp_obj_t fdfile_close(mp_obj_t self_in) {
}
static MP_DEFINE_CONST_FUN_OBJ_1(fdfile_close_obj, fdfile_close);
mp_obj_t fdfile___exit__(uint n_args, const mp_obj_t *args) {
return fdfile_close(args[0]);
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(fdfile___exit___obj, 4, 4, fdfile___exit__);
static mp_obj_t fdfile_fileno(mp_obj_t self_in) {
mp_obj_fdfile_t *self = self_in;
return MP_OBJ_NEW_SMALL_INT((machine_int_t)self->fd);
@ -112,6 +117,8 @@ STATIC const mp_map_elem_t rawfile_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&fdfile_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___enter__), (mp_obj_t)&mp_identity_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___exit__), (mp_obj_t)&fdfile___exit___obj },
};
STATIC MP_DEFINE_CONST_DICT(rawfile_locals_dict, rawfile_locals_dict_table);