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Test all types supported by [collection_is_never_read]

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This commit is contained in:
Michael Schubart 2023-04-11 07:58:47 +09:00
parent 3b5b2ed01a
commit b85deea3f5
2 changed files with 83 additions and 22 deletions
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43
tests/ui/collection_is_never_read.rs
View File

@ -169,22 +169,35 @@ fn function_argument() {
foo(&x);
}
fn string() {
// Do lint (write without read)
let mut s = String::new();
s.push_str("Hello, World!");
fn supported_types() {
let mut x = std::collections::BTreeMap::new(); // WARNING
x.insert(true, 1);
// Do not lint (read without write)
let mut s = String::from("Hello, World!");
let _ = s.len();
let mut x = std::collections::BTreeSet::new(); // WARNING
x.insert(1);
// Do not lint (write and read)
let mut s = String::from("Hello, World!");
s.push_str("foo, bar");
let _ = s.len();
let mut x = std::collections::BinaryHeap::new(); // WARNING
x.push(1);
// Do lint the first line, but not the second
let mut s = String::from("Hello, World!");
let t = String::from("foo, bar");
s = t;
let mut x = std::collections::HashMap::new(); // WARNING
x.insert(1, 2);
let mut x = std::collections::HashSet::new(); // WARNING
x.insert(1);
let mut x = std::collections::LinkedList::new(); // WARNING
x.push_front(1);
let mut x = Some(true); // WARNING
x.insert(false);
let mut x = String::from("hello"); // WARNING
x.push('!');
let mut x = Vec::new(); // WARNING
x.clear();
x.push(1);
let mut x = std::collections::VecDeque::new(); // WARNING
x.push_front(1);
}

62
tests/ui/collection_is_never_read.stderr
View File

@ -61,16 +61,64 @@ LL | let x = vec![1, 2, 3]; // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:174:5
--> $DIR/collection_is_never_read.rs:173:5
|
LL | let mut s = String::new();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
LL | let mut x = std::collections::BTreeMap::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:187:5
--> $DIR/collection_is_never_read.rs:176:5
|
LL | let mut s = String::from("Hello, World!");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
LL | let mut x = std::collections::BTreeSet::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 12 previous errors
error: collection is never read
--> $DIR/collection_is_never_read.rs:179:5
|
LL | let mut x = std::collections::BinaryHeap::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:182:5
|
LL | let mut x = std::collections::HashMap::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:185:5
|
LL | let mut x = std::collections::HashSet::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:188:5
|
LL | let mut x = std::collections::LinkedList::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:191:5
|
LL | let mut x = Some(true); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:194:5
|
LL | let mut x = String::from("hello"); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:197:5
|
LL | let mut x = Vec::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^
error: collection is never read
--> $DIR/collection_is_never_read.rs:201:5
|
LL | let mut x = std::collections::VecDeque::new(); // WARNING
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 20 previous errors