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[rust.git] / tests / ui / float_cmp.rs

diff --git a/tests/ui/float_cmp.rs b/tests/ui/float_cmp.rs
index 9dd9ea9b04d557932fa79eab5400f350fc038ac8..9fa0e5f5c079b5e8bf2b8a0e3f2929f87b45d809 100644 (file)
--- a/tests/ui/float_cmp.rs
+++ b/tests/ui/float_cmp.rs
@@ -1,27 +1,43 @@
-
-
-
-#![warn(float_cmp)]
-#![allow(unused, no_effect, unnecessary_operation, cast_lossless)]
+#![warn(clippy::float_cmp)]
+#![allow(
+    unused,
+    clippy::no_effect,
+    clippy::unnecessary_operation,
+    clippy::cast_lossless,
+    clippy::many_single_char_names
+)]
 
 use std::ops::Add;
 
-const ZERO : f32 = 0.0;
-const ONE : f32 = ZERO + 1.0;
+const ZERO: f32 = 0.0;
+const ONE: f32 = ZERO + 1.0;
 
-fn twice<T>(x : T) -> T where T : Add<T, Output = T>, T : Copy {
+fn twice<T>(x: T) -> T
+where
+    T: Add<T, Output = T> + Copy,
+{
     x + x
 }
 
 fn eq_fl(x: f32, y: f32) -> bool {
-    if x.is_nan() { y.is_nan() } else { x == y } // no error, inside "eq" fn
+    if x.is_nan() {
+        y.is_nan()
+    } else {
+        x == y
+    } // no error, inside "eq" fn
 }
 
 fn fl_eq(x: f32, y: f32) -> bool {
-    if x.is_nan() { y.is_nan() } else { x == y } // no error, inside "eq" fn
+    if x.is_nan() {
+        y.is_nan()
+    } else {
+        x == y
+    } // no error, inside "eq" fn
 }
 
-struct X { val: f32 }
+struct X {
+    val: f32,
+}
 
 impl PartialEq for X {
     fn eq(&self, o: &X) -> bool {
@@ -35,8 +51,8 @@ fn eq(&self, o: &X) -> bool {
 
 fn main() {
     ZERO == 0f32; //no error, comparison with zero is ok
-    1.0f32 != ::std::f32::INFINITY; // also comparison with infinity
-    1.0f32 != ::std::f32::NEG_INFINITY; // and negative infinity
+    1.0f32 != f32::INFINITY; // also comparison with infinity
+    1.0f32 != f32::NEG_INFINITY; // and negative infinity
     ZERO == 0.0; //no error, comparison with zero is ok
     ZERO + ZERO != 1.0; //no error, comparison with zero is ok
 
@@ -49,7 +65,7 @@ fn main() {
     ONE as f64 != 2.0;
     ONE as f64 != 0.0; // no error, comparison with zero is ok
 
-    let x : f64 = 1.0;
+    let x: f64 = 1.0;
 
     x == 1.0;
     x != 0f64; // no error, comparison with zero is ok
@@ -61,9 +77,43 @@ fn main() {
     x <= 0.0;
     x >= 0.0;
 
-    let xs : [f32; 1] = [0.0];
+    let xs: [f32; 1] = [0.0];
     let a: *const f32 = xs.as_ptr();
     let b: *const f32 = xs.as_ptr();
 
     assert_eq!(a, b); // no errors
+
+    const ZERO_ARRAY: [f32; 2] = [0.0, 0.0];
+    const NON_ZERO_ARRAY: [f32; 2] = [0.0, 0.1];
+
+    let i = 0;
+    let j = 1;
+
+    ZERO_ARRAY[i] == NON_ZERO_ARRAY[j]; // ok, because lhs is zero regardless of i
+    NON_ZERO_ARRAY[i] == NON_ZERO_ARRAY[j];
+
+    let a1: [f32; 1] = [0.0];
+    let a2: [f32; 1] = [1.1];
+
+    a1 == a2;
+    a1[0] == a2[0];
+
+    // no errors - comparing signums is ok
+    let x32 = 3.21f32;
+    1.23f32.signum() == x32.signum();
+    1.23f32.signum() == -(x32.signum());
+    1.23f32.signum() == 3.21f32.signum();
+
+    1.23f32.signum() != x32.signum();
+    1.23f32.signum() != -(x32.signum());
+    1.23f32.signum() != 3.21f32.signum();
+
+    let x64 = 3.21f64;
+    1.23f64.signum() == x64.signum();
+    1.23f64.signum() == -(x64.signum());
+    1.23f64.signum() == 3.21f64.signum();
+
+    1.23f64.signum() != x64.signum();
+    1.23f64.signum() != -(x64.signum());
+    1.23f64.signum() != 3.21f64.signum();
 }