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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
extern crate salsa;
use std::{
iter::once,
sync::Arc,
collections::hash_map::{HashMap, DefaultHasher},
any::Any,
hash::{Hash, Hasher},
};
type State = HashMap<u32, String>;
type Data = Arc<Any + Send + Sync + 'static>;
const GET_TEXT: salsa::QueryTypeId = salsa::QueryTypeId(1);
const GET_FILES: salsa::QueryTypeId = salsa::QueryTypeId(2);
const FILE_NEWLINES: salsa::QueryTypeId = salsa::QueryTypeId(3);
const TOTAL_NEWLINES: salsa::QueryTypeId = salsa::QueryTypeId(4);
fn mk_ground_query<T, R>(
state: &State,
params: &Data,
f: fn(&State, &T) -> R,
) -> (Data, salsa::OutputFingerprint)
where
T: 'static,
R: Hash + Send + Sync + 'static,
{
let params = params.downcast_ref().unwrap();
let result = f(state, params);
let fingerprint = o_print(&result);
(Arc::new(result), fingerprint)
}
fn get<T, R>(db: &salsa::Db<State, Data>, query_type: salsa::QueryTypeId, param: T) -> (Arc<R>, Vec<salsa::QueryTypeId>)
where
T: Hash + Send + Sync + 'static,
R: Send + Sync + 'static,
{
let i_print = i_print(¶m);
let param = Arc::new(param);
let (res, trace) = db.get(salsa::QueryId(query_type, i_print), param);
(res.downcast().unwrap(), trace)
}
struct QueryCtx<'a>(&'a salsa::QueryCtx<State, Data>);
impl<'a> QueryCtx<'a> {
fn get_text(&self, id: u32) -> Arc<String> {
let i_print = i_print(&id);
let text = self.0.get(salsa::QueryId(GET_TEXT, i_print), Arc::new(id));
text.downcast().unwrap()
}
fn get_files(&self) -> Arc<Vec<u32>> {
let i_print = i_print(&());
let files = self.0.get(salsa::QueryId(GET_FILES, i_print), Arc::new(()));
let res = files.downcast().unwrap();
res
}
fn get_n_lines(&self, id: u32) -> usize {
let i_print = i_print(&id);
let n_lines = self.0.get(salsa::QueryId(FILE_NEWLINES, i_print), Arc::new(id));
*n_lines.downcast().unwrap()
}
}
fn mk_query<T, R>(
query_ctx: &salsa::QueryCtx<State, Data>,
params: &Data,
f: fn(QueryCtx, &T) -> R,
) -> (Data, salsa::OutputFingerprint)
where
T: 'static,
R: Hash + Send + Sync + 'static,
{
let params: &T = params.downcast_ref().unwrap();
let query_ctx = QueryCtx(query_ctx);
let result = f(query_ctx, params);
let fingerprint = o_print(&result);
(Arc::new(result), fingerprint)
}
fn mk_queries() -> salsa::QueryConfig<State, Data> {
salsa::QueryConfig::<State, Data>::new()
.with_ground_query(GET_TEXT, Box::new(|state, id| {
mk_ground_query::<u32, String>(state, id, |state, id| state[id].clone())
}))
.with_ground_query(GET_FILES, Box::new(|state, id| {
mk_ground_query::<(), Vec<u32>>(state, id, |state, &()| state.keys().cloned().collect())
}))
.with_query(FILE_NEWLINES, Box::new(|query_ctx, id| {
mk_query(query_ctx, id, |query_ctx, &id| {
let text = query_ctx.get_text(id);
text.lines().count()
})
}))
.with_query(TOTAL_NEWLINES, Box::new(|query_ctx, id| {
mk_query(query_ctx, id, |query_ctx, &()| {
let mut total = 0;
for &id in query_ctx.get_files().iter() {
total += query_ctx.get_n_lines(id)
}
total
})
}))
}
#[test]
fn test_number_of_lines() {
let mut state = State::new();
let db = salsa::Db::new(mk_queries(), state.clone());
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 0);
assert_eq!(trace.len(), 2);
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 0);
assert_eq!(trace.len(), 0);
state.insert(1, "hello\nworld".to_string());
let mut inv = salsa::Invalidations::new();
inv.invalidate(GET_TEXT, once(i_print(&1u32)));
inv.invalidate(GET_FILES, once(i_print(&())));
let db = db.with_ground_data(state.clone(), inv);
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 2);
assert_eq!(trace.len(), 4);
state.insert(2, "spam\neggs".to_string());
let mut inv = salsa::Invalidations::new();
inv.invalidate(GET_TEXT, once(i_print(&2u32)));
inv.invalidate(GET_FILES, once(i_print(&())));
let db = db.with_ground_data(state.clone(), inv);
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 4);
assert_eq!(trace.len(), 4);
let mut invs = vec![];
for i in 0..10 {
let id = i + 10;
invs.push(i_print(&id));
state.insert(id, "spam".to_string());
}
let mut inv = salsa::Invalidations::new();
inv.invalidate(GET_TEXT, invs.into_iter());
inv.invalidate(GET_FILES, once(i_print(&())));
let db = db.with_ground_data(state.clone(), inv);
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 14);
assert_eq!(trace.len(), 22);
state.insert(15, String::new());
let mut inv = salsa::Invalidations::new();
inv.invalidate(GET_TEXT, once(i_print(&15u32)));
inv.invalidate(GET_FILES, once(i_print(&())));
let db = db.with_ground_data(state.clone(), inv);
let (newlines, trace) = get::<(), usize>(&db, TOTAL_NEWLINES, ());
assert_eq!(*newlines, 13);
assert_eq!(trace.len(), 4);
}
fn o_print<T: Hash>(x: &T) -> salsa::OutputFingerprint {
let mut hasher = DefaultHasher::new();
x.hash(&mut hasher);
let hash = hasher.finish();
salsa::OutputFingerprint(hash)
}
fn i_print<T: Hash>(x: &T) -> salsa::InputFingerprint {
let mut hasher = DefaultHasher::new();
x.hash(&mut hasher);
let hash = hasher.finish();
salsa::InputFingerprint(hash)
}
|
