1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
use syn::{parse, ForeignItemFn, ItemFn, Stmt};
use crate::syntax::parse::util::FilterAttrs;
use crate::syntax::{
ast::{HardwareTask, HardwareTaskArgs},
parse::util,
};
impl HardwareTask {
pub(crate) fn parse(args: HardwareTaskArgs, item: ItemFn) -> parse::Result<Self> {
let span = item.sig.ident.span();
let valid_signature = util::check_fn_signature(&item, false)
&& item.sig.inputs.len() == 1
&& util::type_is_unit(&item.sig.output);
let name = item.sig.ident.to_string();
if name == "init" || name == "idle" {
return Err(parse::Error::new(
span,
"tasks cannot be named `init` or `idle`",
));
}
if valid_signature {
if let Some((context, Ok(rest))) = util::parse_inputs(item.sig.inputs, &name) {
if rest.is_empty() {
let FilterAttrs { cfgs, attrs, .. } = util::filter_attributes(item.attrs);
return Ok(HardwareTask {
args,
cfgs,
attrs,
context,
stmts: item.block.stmts,
is_extern: false,
});
}
}
}
Err(parse::Error::new(
span,
&format!(
"this task handler must have type signature `fn({}::Context)`",
name
),
))
}
}
impl HardwareTask {
pub(crate) fn parse_foreign(
args: HardwareTaskArgs,
item: ForeignItemFn,
) -> parse::Result<Self> {
let span = item.sig.ident.span();
let valid_signature = util::check_foreign_fn_signature(&item, false)
&& item.sig.inputs.len() == 1
&& util::type_is_unit(&item.sig.output);
let name = item.sig.ident.to_string();
if name == "init" || name == "idle" {
return Err(parse::Error::new(
span,
"tasks cannot be named `init` or `idle`",
));
}
if valid_signature {
if let Some((context, Ok(rest))) = util::parse_inputs(item.sig.inputs, &name) {
if rest.is_empty() {
let FilterAttrs { cfgs, attrs, .. } = util::filter_attributes(item.attrs);
return Ok(HardwareTask {
args,
cfgs,
attrs,
context,
stmts: Vec::<Stmt>::new(),
is_extern: true,
});
}
}
}
Err(parse::Error::new(
span,
&format!(
"this task handler must have type signature `fn({}::Context)`",
name
),
))
}
}
|
