Fix float cmp to use assoc fxx::EPSILON

Author: faern

clippy_lints/src/misc.rs

@@ -388,7 +388,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MiscLints {
                             ),
                             Applicability::HasPlaceholders, // snippet
                         );
-                        db.span_note(expr.span, "`std::f32::EPSILON` and `std::f64::EPSILON` are available.");
+                        db.span_note(expr.span, "`f32::EPSILON` and `f64::EPSILON` are available.");
                     });
                 } else if op == BinOpKind::Rem && is_integer_const(cx, right, 1) {
                     span_lint(cx, MODULO_ONE, expr.span, "any number modulo 1 will be 0");

tests/ui/float_cmp.stderr

@@ -5,7 +5,7 @@ LL |     ONE as f64 != 2.0;
    |     ^^^^^^^^^^^^^^^^^ help: consider comparing them within some error: `(ONE as f64 - 2.0).abs() > error`
    |
    = note: `-D clippy::float-cmp` implied by `-D warnings`
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp.rs:59:5
    |
 LL |     ONE as f64 != 2.0;
@@ -17,7 +17,7 @@ error: strict comparison of `f32` or `f64`
 LL |     x == 1.0;
    |     ^^^^^^^^ help: consider comparing them within some error: `(x - 1.0).abs() < error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp.rs:64:5
    |
 LL |     x == 1.0;
@@ -29,7 +29,7 @@ error: strict comparison of `f32` or `f64`
 LL |     twice(x) != twice(ONE as f64);
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider comparing them within some error: `(twice(x) - twice(ONE as f64)).abs() > error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp.rs:67:5
    |
 LL |     twice(x) != twice(ONE as f64);

tests/ui/float_cmp_const.stderr

@@ -5,7 +5,7 @@ LL |     1f32 == ONE;
    |     ^^^^^^^^^^^ help: consider comparing them within some error: `(1f32 - ONE).abs() < error`
    |
    = note: `-D clippy::float-cmp-const` implied by `-D warnings`
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:20:5
    |
 LL |     1f32 == ONE;
@@ -17,7 +17,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     TWO == ONE;
    |     ^^^^^^^^^^ help: consider comparing them within some error: `(TWO - ONE).abs() < error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:21:5
    |
 LL |     TWO == ONE;
@@ -29,7 +29,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     TWO != ONE;
    |     ^^^^^^^^^^ help: consider comparing them within some error: `(TWO - ONE).abs() > error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:22:5
    |
 LL |     TWO != ONE;
@@ -41,7 +41,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     ONE + ONE == TWO;
    |     ^^^^^^^^^^^^^^^^ help: consider comparing them within some error: `(ONE + ONE - TWO).abs() < error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:23:5
    |
 LL |     ONE + ONE == TWO;
@@ -53,7 +53,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     x as f32 == ONE;
    |     ^^^^^^^^^^^^^^^ help: consider comparing them within some error: `(x as f32 - ONE).abs() < error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:25:5
    |
 LL |     x as f32 == ONE;
@@ -65,7 +65,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     v == ONE;
    |     ^^^^^^^^ help: consider comparing them within some error: `(v - ONE).abs() < error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:28:5
    |
 LL |     v == ONE;
@@ -77,7 +77,7 @@ error: strict comparison of `f32` or `f64` constant
 LL |     v != ONE;
    |     ^^^^^^^^ help: consider comparing them within some error: `(v - ONE).abs() > error`
    |
-note: `std::f32::EPSILON` and `std::f64::EPSILON` are available.
+note: `f32::EPSILON` and `f64::EPSILON` are available.
   --> $DIR/float_cmp_const.rs:29:5
    |
 LL |     v != ONE;