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Fix NAN comparison lint to use assoc NAN

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This commit is contained in:
Linus Färnstrand 2020-04-06 23:53:11 +02:00
parent d342cee787
commit 0b4ee9a649
3 changed files with 64 additions and 65 deletions
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5
clippy_lints/src/misc.rs
View File

@ -57,10 +57,9 @@ declare_clippy_lint! {
///
/// **Example:**
/// ```rust
/// # use core::f32::NAN;
/// # let x = 1.0;
///
/// if x == NAN { }
/// if x == f32::NAN { }
/// ```
pub CMP_NAN,
correctness,
@ -457,7 +456,7 @@ fn check_nan(cx: &LateContext<'_, '_>, expr: &Expr<'_>, cmp_expr: &Expr<'_>) {
cx,
CMP_NAN,
cmp_expr.span,
"doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead",
"doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead",
);
}
}

28
tests/ui/cmp_nan.rs
View File

@ -1,16 +1,16 @@
const NAN_F32: f32 = std::f32::NAN;
const NAN_F64: f64 = std::f64::NAN;
const NAN_F32: f32 = f32::NAN;
const NAN_F64: f64 = f64::NAN;
#[warn(clippy::cmp_nan)]
#[allow(clippy::float_cmp, clippy::no_effect, clippy::unnecessary_operation)]
fn main() {
let x = 5f32;
x == std::f32::NAN;
x != std::f32::NAN;
x < std::f32::NAN;
x > std::f32::NAN;
x <= std::f32::NAN;
x >= std::f32::NAN;
x == f32::NAN;
x != f32::NAN;
x < f32::NAN;
x > f32::NAN;
x <= f32::NAN;
x >= f32::NAN;
x == NAN_F32;
x != NAN_F32;
x < NAN_F32;
@ -19,12 +19,12 @@ fn main() {
x >= NAN_F32;
let y = 0f64;
y == std::f64::NAN;
y != std::f64::NAN;
y < std::f64::NAN;
y > std::f64::NAN;
y <= std::f64::NAN;
y >= std::f64::NAN;
y == f64::NAN;
y != f64::NAN;
y < f64::NAN;
y > f64::NAN;
y <= f64::NAN;
y >= f64::NAN;
y == NAN_F64;
y != NAN_F64;
y < NAN_F64;

96
tests/ui/cmp_nan.stderr
View File

@ -1,144 +1,144 @@
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:8:5
|
LL | x == std::f32::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | x == f32::NAN;
| ^^^^^^^^^^^^^
|
= note: `-D clippy::cmp-nan` implied by `-D warnings`
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:9:5
|
LL | x != std::f32::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | x != f32::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:10:5
|
LL | x < std::f32::NAN;
| ^^^^^^^^^^^^^^^^^
LL | x < f32::NAN;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:11:5
|
LL | x > std::f32::NAN;
| ^^^^^^^^^^^^^^^^^
LL | x > f32::NAN;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:12:5
|
LL | x <= std::f32::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | x <= f32::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:13:5
|
LL | x >= std::f32::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | x >= f32::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:14:5
|
LL | x == NAN_F32;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:15:5
|
LL | x != NAN_F32;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:16:5
|
LL | x < NAN_F32;
| ^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:17:5
|
LL | x > NAN_F32;
| ^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:18:5
|
LL | x <= NAN_F32;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:19:5
|
LL | x >= NAN_F32;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:22:5
|
LL | y == std::f64::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | y == f64::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:23:5
|
LL | y != std::f64::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | y != f64::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:24:5
|
LL | y < std::f64::NAN;
| ^^^^^^^^^^^^^^^^^
LL | y < f64::NAN;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:25:5
|
LL | y > std::f64::NAN;
| ^^^^^^^^^^^^^^^^^
LL | y > f64::NAN;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:26:5
|
LL | y <= std::f64::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | y <= f64::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:27:5
|
LL | y >= std::f64::NAN;
| ^^^^^^^^^^^^^^^^^^
LL | y >= f64::NAN;
| ^^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:28:5
|
LL | y == NAN_F64;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:29:5
|
LL | y != NAN_F64;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:30:5
|
LL | y < NAN_F64;
| ^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:31:5
|
LL | y > NAN_F64;
| ^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:32:5
|
LL | y <= NAN_F64;
| ^^^^^^^^^^^^
error: doomed comparison with `NAN`, use `std::{f32,f64}::is_nan()` instead
error: doomed comparison with `NAN`, use `{f32,f64}::is_nan()` instead
--> $DIR/cmp_nan.rs:33:5
|
LL | y >= NAN_F64;