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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
mod block;
use base_db::{fixture::WithFixture, FilePosition, SourceDatabase};
use expect_test::Expect;
use test_utils::mark;
use crate::{test_db::TestDB, BlockId, ModuleDefId};
use super::*;
fn lower(ra_fixture: &str) -> Arc<Body> {
let db = crate::test_db::TestDB::with_files(ra_fixture);
let krate = db.crate_graph().iter().next().unwrap();
let def_map = db.crate_def_map(krate);
let mut fn_def = None;
'outer: for (_, module) in def_map.modules() {
for decl in module.scope.declarations() {
match decl {
ModuleDefId::FunctionId(it) => {
fn_def = Some(it);
break 'outer;
}
_ => {}
}
}
}
db.body(fn_def.unwrap().into())
}
fn check_diagnostics(ra_fixture: &str) {
let db: TestDB = TestDB::with_files(ra_fixture);
db.check_diagnostics();
}
fn block_def_map_at(ra_fixture: &str) -> Arc<DefMap> {
let (db, position) = crate::test_db::TestDB::with_position(ra_fixture);
let krate = db.crate_graph().iter().next().unwrap();
let def_map = db.crate_def_map(krate);
let mut block =
block_at_pos(&db, &def_map, position).expect("couldn't find enclosing function or block");
loop {
let def_map = db.block_def_map(block);
let new_block = block_at_pos(&db, &def_map, position);
match new_block {
Some(new_block) => {
assert_ne!(block, new_block);
block = new_block;
}
None => {
return def_map;
}
}
}
}
fn block_at_pos(db: &dyn DefDatabase, def_map: &DefMap, position: FilePosition) -> Option<BlockId> {
let mut size = None;
let mut fn_def = None;
for (_, module) in def_map.modules() {
let file_id = module.definition_source(db).file_id;
if file_id != position.file_id.into() {
continue;
}
let root = db.parse_or_expand(file_id).unwrap();
let ast_map = db.ast_id_map(file_id);
let item_tree = db.item_tree(file_id);
for decl in module.scope.declarations() {
if let ModuleDefId::FunctionId(it) = decl {
let ast = ast_map.get(item_tree[it.lookup(db).id.value].ast_id).to_node(&root);
let range = ast.syntax().text_range();
// Find the smallest (innermost) function containing the cursor.
if !range.contains(position.offset) {
continue;
}
let new_size = match size {
None => range.len(),
Some(size) => {
if range.len() < size {
range.len()
} else {
size
}
}
};
if size != Some(new_size) {
size = Some(new_size);
fn_def = Some(it);
}
}
}
}
let (body, source_map) = db.body_with_source_map(fn_def?.into());
// Now find the smallest encompassing block expression in the function body.
let mut size = None;
let mut block_id = None;
for (expr_id, expr) in body.exprs.iter() {
if let Expr::Block { id, .. } = expr {
if let Ok(ast) = source_map.expr_syntax(expr_id) {
if ast.file_id != position.file_id.into() {
continue;
}
let root = db.parse_or_expand(ast.file_id).unwrap();
let ast = ast.value.to_node(&root);
let range = ast.syntax().text_range();
if !range.contains(position.offset) {
continue;
}
let new_size = match size {
None => range.len(),
Some(size) => {
if range.len() < size {
range.len()
} else {
size
}
}
};
if size != Some(new_size) {
size = Some(new_size);
block_id = Some(*id);
}
}
}
}
Some(block_id.expect("can't find block containing cursor"))
}
fn check_at(ra_fixture: &str, expect: Expect) {
let def_map = block_def_map_at(ra_fixture);
let actual = def_map.dump();
expect.assert_eq(&actual);
}
#[test]
fn your_stack_belongs_to_me() {
mark::check!(your_stack_belongs_to_me);
lower(
"
macro_rules! n_nuple {
($e:tt) => ();
($($rest:tt)*) => {{
(n_nuple!($($rest)*)None,)
}};
}
fn main() { n_nuple!(1,2,3); }
",
);
}
#[test]
fn macro_resolve() {
// Regression test for a path resolution bug introduced with inner item handling.
lower(
r"
macro_rules! vec {
() => { () };
($elem:expr; $n:expr) => { () };
($($x:expr),+ $(,)?) => { () };
}
mod m {
fn outer() {
let _ = vec![FileSet::default(); self.len()];
}
}
",
);
}
#[test]
fn cfg_diagnostics() {
check_diagnostics(
r"
fn f() {
// The three g̶e̶n̶d̶e̶r̶s̶ statements:
#[cfg(a)] fn f() {} // Item statement
//^^^^^^^^^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
#[cfg(a)] {} // Expression statement
//^^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
#[cfg(a)] let x = 0; // let statement
//^^^^^^^^^^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
abc(#[cfg(a)] 0);
//^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
let x = Struct {
#[cfg(a)] f: 0,
//^^^^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
};
match () {
() => (),
#[cfg(a)] () => (),
//^^^^^^^^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
}
#[cfg(a)] 0 // Trailing expression of block
//^^^^^^^^^^^ code is inactive due to #[cfg] directives: a is disabled
}
",
);
}
#[test]
fn macro_diag_builtin() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! env {}
#[rustc_builtin_macro]
macro_rules! include {}
#[rustc_builtin_macro]
macro_rules! compile_error {}
#[rustc_builtin_macro]
macro_rules! format_args {
() => {}
}
fn f() {
// Test a handful of built-in (eager) macros:
include!(invalid);
//^^^^^^^^^^^^^^^^^ could not convert tokens
include!("does not exist");
//^^^^^^^^^^^^^^^^^^^^^^^^^^ could not convert tokens
env!(invalid);
//^^^^^^^^^^^^^ could not convert tokens
env!("OUT_DIR");
//^^^^^^^^^^^^^^^ `OUT_DIR` not set, enable "load out dirs from check" to fix
compile_error!("compile_error works");
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ compile_error works
// Lazy:
format_args!();
//^^^^^^^^^^^^^^ no rule matches input tokens
}
"#,
);
}
#[test]
fn macro_rules_diag() {
check_diagnostics(
r#"
macro_rules! m {
() => {};
}
fn f() {
m!();
m!(hi);
//^^^^^^ leftover tokens
}
"#,
);
}
#[test]
fn dollar_crate_in_builtin_macro() {
check_diagnostics(
r#"
#[macro_export]
#[rustc_builtin_macro]
macro_rules! format_args {}
#[macro_export]
macro_rules! arg {
() => {}
}
#[macro_export]
macro_rules! outer {
() => {
$crate::format_args!( "", $crate::arg!(1) )
};
}
fn f() {
outer!();
//^^^^^^^^ leftover tokens
}
"#,
)
}
|
