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const_static_lifetime: this applies not only to path types

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For example, &'static [u8] or &'static (t1, t2).
This commit is contained in:
Georg Brandl 2017-11-18 16:10:28 +01:00
parent 2d005b58c5
commit 296edda3a9
3 changed files with 52 additions and 13 deletions
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29
clippy_lints/src/const_static_lifetime.rs
View file

@ -48,20 +48,23 @@ impl StaticConst {
TyKind::Rptr(ref optional_lifetime, ref borrow_type) => {
// Match the 'static lifetime
if let Some(lifetime) = *optional_lifetime {
if let TyKind::Path(_, _) = borrow_type.ty.node {
// Verify that the path is a str
if lifetime.ident.name == "'static" {
let mut sug: String = String::new();
span_lint_and_then(
cx,
CONST_STATIC_LIFETIME,
lifetime.span,
"Constants have by default a `'static` lifetime",
|db| {
db.span_suggestion(lifetime.span, "consider removing `'static`", sug);
},
);
match borrow_type.ty.node {
TyKind::Path(..) | TyKind::Slice(..) | TyKind::Array(..) |
TyKind::Tup(..) => {
if lifetime.ident.name == "'static" {
let mut sug: String = String::new();
span_lint_and_then(
cx,
CONST_STATIC_LIFETIME,
lifetime.span,
"Constants have by default a `'static` lifetime",
|db| {
db.span_suggestion(lifetime.span, "consider removing `'static`", sug);
},
);
}
}
_ => {}
}
}
self.visit_type(&*borrow_type.ty, cx);

6
tests/ui/const_static_lifetime.rs
View file

@ -17,6 +17,12 @@ const VAR_SEVEN: &[&(&str, &'static [&'static str])] = &[&("one", &["other one"]
const VAR_HEIGHT: &'static Foo = &Foo {};
const VAR_SLICE: &'static [u8] = b"Test constant #1"; // ERROR Consider removing 'static.
const VAR_TUPLE: &'static (u8, u8) = &(1, 2); // ERROR Consider removing 'static.
const VAR_ARRAY: &'static [u8; 1] = b"T"; // ERROR Consider removing 'static.
fn main() {
let false_positive: &'static str = "test";
println!("{}", VAR_ONE);

30
tests/ui/const_static_lifetime.stderr
View file

@ -24,6 +24,12 @@ error: Constants have by default a `'static` lifetime
10 | const VAR_FOUR: (&str, (&str, &'static str), &'static str) = ("on", ("th", "th"), "on"); // ERROR Consider removing 'static
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:12:18
|
12 | const VAR_FIVE: &'static [&[&'static str]] = &[&["test"], &["other one"]]; // ERROR Consider removing 'static
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:12:30
|
@ -36,6 +42,12 @@ error: Constants have by default a `'static` lifetime
14 | const VAR_SIX: &'static u8 = &5;
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:16:29
|
16 | const VAR_SEVEN: &[&(&str, &'static [&'static str])] = &[&("one", &["other one"])];
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:16:39
|
@ -48,3 +60,21 @@ error: Constants have by default a `'static` lifetime
18 | const VAR_HEIGHT: &'static Foo = &Foo {};
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:20:19
|
20 | const VAR_SLICE: &'static [u8] = b"Test constant #1"; // ERROR Consider removing 'static.
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:22:19
|
22 | const VAR_TUPLE: &'static (u8, u8) = &(1, 2); // ERROR Consider removing 'static.
| ^^^^^^^ help: consider removing `'static`
error: Constants have by default a `'static` lifetime
--> $DIR/const_static_lifetime.rs:24:19
|
24 | const VAR_ARRAY: &'static [u8; 1] = b"T"; // ERROR Consider removing 'static.
| ^^^^^^^ help: consider removing `'static`