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Auto merge of rust-lang#4781 - lzutao:rustup/65134, r=matthiaskrgr
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rustup improper_ctypes: `extern "C"` fns

cc rust-lang/rust#65134
changelog: none
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@bors
bors committed Nov 6, 2019
2 parents 0be213b + fdc0153 commit 43a3796
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Showing 3 changed files with 31 additions and 30 deletions.
4 changes: 2 additions & 2 deletions tests/ui/functions.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -31,12 +31,12 @@ fn bad_multiline(
extern "C" fn extern_fn(
_one: u32,
_two: u32,
_three: &str,
_three: *const u8,
_four: bool,
_five: f32,
_six: f32,
_seven: bool,
_eight: (),
_eight: *const std::ffi::c_void,
) {
}

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5 changes: 3 additions & 2 deletions tests/ui/needless_pass_by_value.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
use std::borrow::Borrow;
use std::collections::HashSet;
use std::convert::AsRef;
use std::mem::MaybeUninit;

// `v` should be warned
// `w`, `x` and `y` are allowed (moved or mutated)
Expand Down Expand Up @@ -111,8 +112,8 @@ trait FalsePositive {
}

// shouldn't warn on extern funcs
extern "C" fn ext(x: String) -> usize {
x.len()
extern "C" fn ext(x: MaybeUninit<usize>) -> usize {
unsafe { x.assume_init() }
}

// whitelist RangeArgument
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52 changes: 26 additions & 26 deletions tests/ui/needless_pass_by_value.stderr
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Original file line number Diff line number Diff line change
@@ -1,61 +1,61 @@
error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:17:23
--> $DIR/needless_pass_by_value.rs:18:23
|
LL | fn foo<T: Default>(v: Vec<T>, w: Vec<T>, mut x: Vec<T>, y: Vec<T>) -> Vec<T> {
| ^^^^^^ help: consider changing the type to: `&[T]`
|
= note: `-D clippy::needless-pass-by-value` implied by `-D warnings`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:31:11
--> $DIR/needless_pass_by_value.rs:32:11
|
LL | fn bar(x: String, y: Wrapper) {
| ^^^^^^ help: consider changing the type to: `&str`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:31:22
--> $DIR/needless_pass_by_value.rs:32:22
|
LL | fn bar(x: String, y: Wrapper) {
| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:37:71
--> $DIR/needless_pass_by_value.rs:38:71
|
LL | fn test_borrow_trait<T: Borrow<str>, U: AsRef<str>, V>(t: T, u: U, v: V) {
| ^ help: consider taking a reference instead: `&V`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:49:18
--> $DIR/needless_pass_by_value.rs:50:18
|
LL | fn test_match(x: Option<Option<String>>, y: Option<Option<String>>) {
| ^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&Option<Option<String>>`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:62:24
--> $DIR/needless_pass_by_value.rs:63:24
|
LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:62:36
--> $DIR/needless_pass_by_value.rs:63:36
|
LL | fn test_destructure(x: Wrapper, y: Wrapper, z: Wrapper) {
| ^^^^^^^ help: consider taking a reference instead: `&Wrapper`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:78:49
--> $DIR/needless_pass_by_value.rs:79:49
|
LL | fn test_blanket_ref<T: Foo, S: Serialize>(_foo: T, _serializable: S) {}
| ^ help: consider taking a reference instead: `&T`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:80:18
--> $DIR/needless_pass_by_value.rs:81:18
|
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
| ^^^^^^ help: consider taking a reference instead: `&String`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:80:29
--> $DIR/needless_pass_by_value.rs:81:29
|
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
| ^^^^^^
Expand All @@ -70,13 +70,13 @@ LL | let _ = t.to_string();
| ^^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:80:40
--> $DIR/needless_pass_by_value.rs:81:40
|
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
| ^^^^^^^^ help: consider taking a reference instead: `&Vec<i32>`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:80:53
--> $DIR/needless_pass_by_value.rs:81:53
|
LL | fn issue_2114(s: String, t: String, u: Vec<i32>, v: Vec<i32>) {
| ^^^^^^^^
Expand All @@ -91,85 +91,85 @@ LL | let _ = v.to_owned();
| ^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:93:12
--> $DIR/needless_pass_by_value.rs:94:12
|
LL | s: String,
| ^^^^^^ help: consider changing the type to: `&str`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:94:12
--> $DIR/needless_pass_by_value.rs:95:12
|
LL | t: String,
| ^^^^^^ help: consider taking a reference instead: `&String`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:103:23
--> $DIR/needless_pass_by_value.rs:104:23
|
LL | fn baz(&self, _u: U, _s: Self) {}
| ^ help: consider taking a reference instead: `&U`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:103:30
--> $DIR/needless_pass_by_value.rs:104:30
|
LL | fn baz(&self, _u: U, _s: Self) {}
| ^^^^ help: consider taking a reference instead: `&Self`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:125:24
--> $DIR/needless_pass_by_value.rs:126:24
|
LL | fn bar_copy(x: u32, y: CopyWrapper) {
| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
|
help: consider marking this type as Copy
--> $DIR/needless_pass_by_value.rs:123:1
--> $DIR/needless_pass_by_value.rs:124:1
|
LL | struct CopyWrapper(u32);
| ^^^^^^^^^^^^^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:131:29
--> $DIR/needless_pass_by_value.rs:132:29
|
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
|
help: consider marking this type as Copy
--> $DIR/needless_pass_by_value.rs:123:1
--> $DIR/needless_pass_by_value.rs:124:1
|
LL | struct CopyWrapper(u32);
| ^^^^^^^^^^^^^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:131:45
--> $DIR/needless_pass_by_value.rs:132:45
|
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
|
help: consider marking this type as Copy
--> $DIR/needless_pass_by_value.rs:123:1
--> $DIR/needless_pass_by_value.rs:124:1
|
LL | struct CopyWrapper(u32);
| ^^^^^^^^^^^^^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:131:61
--> $DIR/needless_pass_by_value.rs:132:61
|
LL | fn test_destructure_copy(x: CopyWrapper, y: CopyWrapper, z: CopyWrapper) {
| ^^^^^^^^^^^ help: consider taking a reference instead: `&CopyWrapper`
|
help: consider marking this type as Copy
--> $DIR/needless_pass_by_value.rs:123:1
--> $DIR/needless_pass_by_value.rs:124:1
|
LL | struct CopyWrapper(u32);
| ^^^^^^^^^^^^^^^^^^^^^^^^

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:143:40
--> $DIR/needless_pass_by_value.rs:144:40
|
LL | fn some_fun<'b, S: Bar<'b, ()>>(_item: S) {}
| ^ help: consider taking a reference instead: `&S`

error: this argument is passed by value, but not consumed in the function body
--> $DIR/needless_pass_by_value.rs:148:20
--> $DIR/needless_pass_by_value.rs:149:20
|
LL | fn more_fun(_item: impl Club<'static, i32>) {}
| ^^^^^^^^^^^^^^^^^^^^^^^ help: consider taking a reference instead: `&impl Club<'static, i32>`
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