rustup improper_ctypes: extern "C" fns
This commit is contained in:
Lzu Tao
parent
0be213bb79
commit
fdc0153ef5
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@ -31,12 +31,12 @@ fn bad_multiline(
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extern "C" fn extern_fn(
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_one: u32,
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_two: u32,
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_three: &str,
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_three: *const u8,
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_four: bool,
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_five: f32,
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_six: f32,
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_seven: bool,
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_eight: (),
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_eight: *const std::ffi::c_void,
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) {
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}
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@ -11,6 +11,7 @@
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use std::borrow::Borrow;
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use std::collections::HashSet;
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use std::convert::AsRef;
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use std::mem::MaybeUninit;
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// `v` should be warned
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// `w`, `x` and `y` are allowed (moved or mutated)
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@ -111,8 +112,8 @@ trait FalsePositive {
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}
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// shouldn't warn on extern funcs
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extern "C" fn ext(x: String) -> usize {
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x.len()
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extern "C" fn ext(x: MaybeUninit<usize>) -> usize {
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unsafe { x.assume_init() }
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}
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// whitelist RangeArgument
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@ -1,5 +1,5 @@
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:17:23
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--> $DIR/needless_pass_by_value.rs:18:23
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LL | fn foo<T: Default>(v: Vec<T>, w: Vec<T>, mut x: Vec<T>, y: Vec<T>) -> Vec<T> {
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| ^^^^^^ help: consider changing the type to: `&[T]`
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@ -7,55 +7,55 @@ LL | fn foo<T: Default>(v: Vec<T>, w: Vec<T>, mut x: Vec<T>, y: Vec<T>) -> Vec<T
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= note: `-D clippy::needless-pass-by-value` implied by `-D warnings`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:31:11
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--> $DIR/needless_pass_by_value.rs:32:11
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LL | fn bar(x: String, y: Wrapper) {
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| ^^^^^^ help: consider changing the type to: `&str`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:31:22
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--> $DIR/needless_pass_by_value.rs:32:22
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LL | fn bar(x: String, y: Wrapper) {
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| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:37:71
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--> $DIR/needless_pass_by_value.rs:38:71
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LL | fn test_borrow_trait<T: Borrow<str>, U: AsRef<str>, V>(t: T, u: U, v: V) {
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| ^ help: consider taking a reference instead: `&V`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:49:18
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--> $DIR/needless_pass_by_value.rs:50:18
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LL | fn test_match(x: Option<Option<String>>, y: Option<Option<String>>) {
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| ^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&Option<Option<String>>`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:62:24
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--> $DIR/needless_pass_by_value.rs:63:24
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LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
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| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:62:36
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--> $DIR/needless_pass_by_value.rs:63:36
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LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
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| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:78:49
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--> $DIR/needless_pass_by_value.rs:79:49
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LL | fn test_blanket_ref<T: Foo, S: Serialize>(_foo: T, _serializable: S) {}
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| ^ help: consider taking a reference instead: `&T`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:80:18
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--> $DIR/needless_pass_by_value.rs:81:18
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LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
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| ^^^^^^ help: consider taking a reference instead: `&String`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:80:29
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--> $DIR/needless_pass_by_value.rs:81:29
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LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
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| ^^^^^^
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@ -70,13 +70,13 @@ LL | let _ = t.to_string();
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| ^^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:80:40
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--> $DIR/needless_pass_by_value.rs:81:40
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LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
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| ^^^^^^^^ help: consider taking a reference instead: `&Vec<i32>`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:80:53
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--> $DIR/needless_pass_by_value.rs:81:53
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LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
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| ^^^^^^^^
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@ -91,85 +91,85 @@ LL | let _ = v.to_owned();
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| ^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:93:12
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--> $DIR/needless_pass_by_value.rs:94:12
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LL | s: String,
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| ^^^^^^ help: consider changing the type to: `&str`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:94:12
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--> $DIR/needless_pass_by_value.rs:95:12
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LL | t: String,
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| ^^^^^^ help: consider taking a reference instead: `&String`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:103:23
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--> $DIR/needless_pass_by_value.rs:104:23
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LL | fn baz(&self, _u: U, _s: Self) {}
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| ^ help: consider taking a reference instead: `&U`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:103:30
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--> $DIR/needless_pass_by_value.rs:104:30
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LL | fn baz(&self, _u: U, _s: Self) {}
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| ^^^^ help: consider taking a reference instead: `&Self`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:125:24
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--> $DIR/needless_pass_by_value.rs:126:24
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LL | fn bar_copy(x: u32, y: CopyWrapper) {
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| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
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help: consider marking this type as Copy
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--> $DIR/needless_pass_by_value.rs:123:1
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--> $DIR/needless_pass_by_value.rs:124:1
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LL | struct CopyWrapper(u32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:131:29
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--> $DIR/needless_pass_by_value.rs:132:29
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LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
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| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
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help: consider marking this type as Copy
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--> $DIR/needless_pass_by_value.rs:123:1
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--> $DIR/needless_pass_by_value.rs:124:1
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LL | struct CopyWrapper(u32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:131:45
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--> $DIR/needless_pass_by_value.rs:132:45
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LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
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| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
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help: consider marking this type as Copy
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--> $DIR/needless_pass_by_value.rs:123:1
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--> $DIR/needless_pass_by_value.rs:124:1
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LL | struct CopyWrapper(u32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:131:61
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--> $DIR/needless_pass_by_value.rs:132:61
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LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
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| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
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help: consider marking this type as Copy
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--> $DIR/needless_pass_by_value.rs:123:1
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--> $DIR/needless_pass_by_value.rs:124:1
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LL | struct CopyWrapper(u32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:143:40
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--> $DIR/needless_pass_by_value.rs:144:40
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LL | fn some_fun<'b, S: Bar<'b, ()>>(_item: S) {}
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| ^ help: consider taking a reference instead: `&S`
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error: this argument is passed by value, but not consumed in the function body
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--> $DIR/needless_pass_by_value.rs:148:20
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--> $DIR/needless_pass_by_value.rs:149:20
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LL | fn more_fun(_item: impl Club<'static, i32>) {}
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| ^^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&impl Club<'static, i32>`
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