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
|
use crate::{Diagnostic, DiagnosticsContext};
// Diagnostic: macro-error
//
// This diagnostic is shown for macro expansion errors.
pub(super) fn macro_error(ctx: &DiagnosticsContext<'_>, d: &hir::MacroError) -> Diagnostic {
Diagnostic::new(
"macro-error",
d.message.clone(),
ctx.sema.diagnostics_display_range(d.node.clone()).range,
)
.experimental()
}
#[cfg(test)]
mod tests {
use crate::{
tests::{check_diagnostics, check_diagnostics_with_config},
DiagnosticsConfig,
};
#[test]
fn builtin_macro_fails_expansion() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! include { () => {} }
include!("doesntexist");
//^^^^^^^^^^^^^^^^^^^^^^^^ failed to load file `doesntexist`
"#,
);
}
#[test]
fn include_macro_should_allow_empty_content() {
let mut config = DiagnosticsConfig::default();
// FIXME: This is a false-positive, the file is actually linked in via
// `include!` macro
config.disabled.insert("unlinked-file".to_string());
check_diagnostics_with_config(
config,
r#"
//- /lib.rs
#[rustc_builtin_macro]
macro_rules! include { () => {} }
include!("foo/bar.rs");
//- /foo/bar.rs
// empty
"#,
);
}
#[test]
fn good_out_dir_diagnostic() {
check_diagnostics(
r#"
#[rustc_builtin_macro]
macro_rules! include { () => {} }
#[rustc_builtin_macro]
macro_rules! env { () => {} }
#[rustc_builtin_macro]
macro_rules! concat { () => {} }
include!(concat!(env!("OUT_DIR"), "/out.rs"));
//^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `OUT_DIR` not set, enable "run build scripts" to fix
"#,
);
}
#[test]
fn register_attr_and_tool() {
cov_mark::check!(register_attr);
cov_mark::check!(register_tool);
check_diagnostics(
r#"
#![register_tool(tool)]
#![register_attr(attr)]
#[tool::path]
#[attr]
struct S;
"#,
);
// NB: we don't currently emit diagnostics here
}
#[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 main() {
// Test a handful of built-in (eager) macros:
include!(invalid);
//^^^^^^^^^^^^^^^^^ could not convert tokens
include!("does not exist");
//^^^^^^^^^^^^^^^^^^^^^^^^^^ failed to load file `does not exist`
env!(invalid);
//^^^^^^^^^^^^^ could not convert tokens
env!("OUT_DIR");
//^^^^^^^^^^^^^^^ `OUT_DIR` not set, enable "run build scripts" 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
"#,
)
}
}
|
