chore: fix and split some ui tests on 32bit system

Author: tesuji

clippy_lints/src/enum_clike.rs

@@ -24,6 +24,7 @@ declare_clippy_lint! {
     ///
     /// **Example:**
     /// ```rust
+    /// # #[cfg(target_pointer_width = "64")]
     /// #[repr(usize)]
     /// enum NonPortable {
     ///     X = 0x1_0000_0000,

tests/ui/cast_size.rs

@@ -1,3 +1,4 @@
+// ignore-32bit
 #[warn(
     clippy::cast_precision_loss,
     clippy::cast_possible_truncation,

tests/ui/cast_size.stderr

@@ -1,113 +1,113 @@
 error: casting isize to i8 may truncate the value
-  --> $DIR/cast_size.rs:11:5
+  --> $DIR/cast_size.rs:12:5
    |
 LL |     1isize as i8;
    |     ^^^^^^^^^^^^
    |
    = note: `-D clippy::cast-possible-truncation` implied by `-D warnings`
 
 error: casting isize to f64 causes a loss of precision on targets with 64-bit wide pointers (isize is 64 bits wide, but f64's mantissa is only 52 bits wide)
-  --> $DIR/cast_size.rs:14:5
+  --> $DIR/cast_size.rs:15:5
    |
 LL |     x0 as f64;
    |     ^^^^^^^^^
    |
    = note: `-D clippy::cast-precision-loss` implied by `-D warnings`
 
 error: casting usize to f64 causes a loss of precision on targets with 64-bit wide pointers (usize is 64 bits wide, but f64's mantissa is only 52 bits wide)
-  --> $DIR/cast_size.rs:15:5
+  --> $DIR/cast_size.rs:16:5
    |
 LL |     x1 as f64;
    |     ^^^^^^^^^
 
 error: casting isize to f32 causes a loss of precision (isize is 32 or 64 bits wide, but f32's mantissa is only 23 bits wide)
-  --> $DIR/cast_size.rs:16:5
+  --> $DIR/cast_size.rs:17:5
    |
 LL |     x0 as f32;
    |     ^^^^^^^^^
 
 error: casting usize to f32 causes a loss of precision (usize is 32 or 64 bits wide, but f32's mantissa is only 23 bits wide)
-  --> $DIR/cast_size.rs:17:5
+  --> $DIR/cast_size.rs:18:5
    |
 LL |     x1 as f32;
    |     ^^^^^^^^^
 
 error: casting isize to i32 may truncate the value on targets with 64-bit wide pointers
-  --> $DIR/cast_size.rs:18:5
+  --> $DIR/cast_size.rs:19:5
    |
 LL |     1isize as i32;
    |     ^^^^^^^^^^^^^
 
 error: casting isize to u32 may truncate the value on targets with 64-bit wide pointers
-  --> $DIR/cast_size.rs:19:5
+  --> $DIR/cast_size.rs:20:5
    |
 LL |     1isize as u32;
    |     ^^^^^^^^^^^^^
 
 error: casting usize to u32 may truncate the value on targets with 64-bit wide pointers
-  --> $DIR/cast_size.rs:20:5
+  --> $DIR/cast_size.rs:21:5
    |
 LL |     1usize as u32;
    |     ^^^^^^^^^^^^^
 
 error: casting usize to i32 may truncate the value on targets with 64-bit wide pointers
-  --> $DIR/cast_size.rs:21:5
+  --> $DIR/cast_size.rs:22:5
    |
 LL |     1usize as i32;
    |     ^^^^^^^^^^^^^
 
 error: casting usize to i32 may wrap around the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:21:5
+  --> $DIR/cast_size.rs:22:5
    |
 LL |     1usize as i32;
    |     ^^^^^^^^^^^^^
    |
    = note: `-D clippy::cast-possible-wrap` implied by `-D warnings`
 
 error: casting i64 to isize may truncate the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:23:5
+  --> $DIR/cast_size.rs:24:5
    |
 LL |     1i64 as isize;
    |     ^^^^^^^^^^^^^
 
 error: casting i64 to usize may truncate the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:24:5
+  --> $DIR/cast_size.rs:25:5
    |
 LL |     1i64 as usize;
    |     ^^^^^^^^^^^^^
 
 error: casting u64 to isize may truncate the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:25:5
+  --> $DIR/cast_size.rs:26:5
    |
 LL |     1u64 as isize;
    |     ^^^^^^^^^^^^^
 
 error: casting u64 to isize may wrap around the value on targets with 64-bit wide pointers
-  --> $DIR/cast_size.rs:25:5
+  --> $DIR/cast_size.rs:26:5
    |
 LL |     1u64 as isize;
    |     ^^^^^^^^^^^^^
 
 error: casting u64 to usize may truncate the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:26:5
+  --> $DIR/cast_size.rs:27:5
    |
 LL |     1u64 as usize;
    |     ^^^^^^^^^^^^^
 
 error: casting u32 to isize may wrap around the value on targets with 32-bit wide pointers
-  --> $DIR/cast_size.rs:27:5
+  --> $DIR/cast_size.rs:28:5
    |
 LL |     1u32 as isize;
    |     ^^^^^^^^^^^^^
 
 error: casting i32 to f32 causes a loss of precision (i32 is 32 bits wide, but f32's mantissa is only 23 bits wide)
-  --> $DIR/cast_size.rs:32:5
+  --> $DIR/cast_size.rs:33:5
    |
 LL |     999_999_999 as f32;
    |     ^^^^^^^^^^^^^^^^^^
 
 error: casting usize to f64 causes a loss of precision on targets with 64-bit wide pointers (usize is 64 bits wide, but f64's mantissa is only 52 bits wide)
-  --> $DIR/cast_size.rs:33:5
+  --> $DIR/cast_size.rs:34:5
    |
 LL |     9_999_999_999_999_999usize as f64;
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/ui/cast_size_32bit.rs

@@ -0,0 +1,35 @@
+// ignore-64bit
+#[warn(
+    clippy::cast_precision_loss,
+    clippy::cast_possible_truncation,
+    clippy::cast_sign_loss,
+    clippy::cast_possible_wrap,
+    clippy::cast_lossless
+)]
+#[allow(clippy::no_effect, clippy::unnecessary_operation)]
+fn main() {
+    // Casting from *size
+    1isize as i8;
+    let x0 = 1isize;
+    let x1 = 1usize;
+    x0 as f64;
+    x1 as f64;
+    x0 as f32;
+    x1 as f32;
+    1isize as i32;
+    1isize as u32;
+    1usize as u32;
+    1usize as i32;
+    // Casting to *size
+    1i64 as isize;
+    1i64 as usize;
+    1u64 as isize;
+    1u64 as usize;
+    1u32 as isize;
+    1u32 as usize; // Should not trigger any lint
+    1i32 as isize; // Neither should this
+    1i32 as usize;
+    // Big integer literal to float
+    999_999_999 as f32;
+    3_999_999_999usize as f64;
+}

tests/ui/cast_size_32bit.stderr

@@ -0,0 +1,132 @@
+error: casting isize to i8 may truncate the value
+  --> $DIR/cast_size_32bit.rs:12:5
+   |
+LL |     1isize as i8;
+   |     ^^^^^^^^^^^^
+   |
+   = note: `-D clippy::cast-possible-truncation` implied by `-D warnings`
+
+error: casting isize to f64 causes a loss of precision on targets with 64-bit wide pointers (isize is 64 bits wide, but f64's mantissa is only 52 bits wide)
+  --> $DIR/cast_size_32bit.rs:15:5
+   |
+LL |     x0 as f64;
+   |     ^^^^^^^^^
+   |
+   = note: `-D clippy::cast-precision-loss` implied by `-D warnings`
+
+error: casting isize to f64 may become silently lossy if you later change the type
+  --> $DIR/cast_size_32bit.rs:15:5
+   |
+LL |     x0 as f64;
+   |     ^^^^^^^^^ help: try: `f64::from(x0)`
+   |
+   = note: `-D clippy::cast-lossless` implied by `-D warnings`
+
+error: casting usize to f64 causes a loss of precision on targets with 64-bit wide pointers (usize is 64 bits wide, but f64's mantissa is only 52 bits wide)
+  --> $DIR/cast_size_32bit.rs:16:5
+   |
+LL |     x1 as f64;
+   |     ^^^^^^^^^
+
+error: casting usize to f64 may become silently lossy if you later change the type
+  --> $DIR/cast_size_32bit.rs:16:5
+   |
+LL |     x1 as f64;
+   |     ^^^^^^^^^ help: try: `f64::from(x1)`
+
+error: casting isize to f32 causes a loss of precision (isize is 32 or 64 bits wide, but f32's mantissa is only 23 bits wide)
+  --> $DIR/cast_size_32bit.rs:17:5
+   |
+LL |     x0 as f32;
+   |     ^^^^^^^^^
+
+error: casting usize to f32 causes a loss of precision (usize is 32 or 64 bits wide, but f32's mantissa is only 23 bits wide)
+  --> $DIR/cast_size_32bit.rs:18:5
+   |
+LL |     x1 as f32;
+   |     ^^^^^^^^^
+
+error: casting isize to i32 may truncate the value on targets with 64-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:19:5
+   |
+LL |     1isize as i32;
+   |     ^^^^^^^^^^^^^
+
+error: casting isize to u32 may truncate the value on targets with 64-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:20:5
+   |
+LL |     1isize as u32;
+   |     ^^^^^^^^^^^^^
+
+error: casting usize to u32 may truncate the value on targets with 64-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:21:5
+   |
+LL |     1usize as u32;
+   |     ^^^^^^^^^^^^^
+
+error: casting usize to i32 may truncate the value on targets with 64-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:22:5
+   |
+LL |     1usize as i32;
+   |     ^^^^^^^^^^^^^
+
+error: casting usize to i32 may wrap around the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:22:5
+   |
+LL |     1usize as i32;
+   |     ^^^^^^^^^^^^^
+   |
+   = note: `-D clippy::cast-possible-wrap` implied by `-D warnings`
+
+error: casting i64 to isize may truncate the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:24:5
+   |
+LL |     1i64 as isize;
+   |     ^^^^^^^^^^^^^
+
+error: casting i64 to usize may truncate the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:25:5
+   |
+LL |     1i64 as usize;
+   |     ^^^^^^^^^^^^^
+
+error: casting u64 to isize may truncate the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:26:5
+   |
+LL |     1u64 as isize;
+   |     ^^^^^^^^^^^^^
+
+error: casting u64 to isize may wrap around the value on targets with 64-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:26:5
+   |
+LL |     1u64 as isize;
+   |     ^^^^^^^^^^^^^
+
+error: casting u64 to usize may truncate the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:27:5
+   |
+LL |     1u64 as usize;
+   |     ^^^^^^^^^^^^^
+
+error: casting u32 to isize may wrap around the value on targets with 32-bit wide pointers
+  --> $DIR/cast_size_32bit.rs:28:5
+   |
+LL |     1u32 as isize;
+   |     ^^^^^^^^^^^^^
+
+error: casting i32 to f32 causes a loss of precision (i32 is 32 bits wide, but f32's mantissa is only 23 bits wide)
+  --> $DIR/cast_size_32bit.rs:33:5
+   |
+LL |     999_999_999 as f32;
+   |     ^^^^^^^^^^^^^^^^^^
+
+error: casting integer literal to f64 is unnecessary
+  --> $DIR/cast_size_32bit.rs:34:5
+   |
+LL |     3_999_999_999usize as f64;
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `3999999999_f64`
+   |
+   = note: `-D clippy::unnecessary-cast` implied by `-D warnings`
+
+error: aborting due to 20 previous errors
+

tests/ui/fn_to_numeric_cast.rs

@@ -1,4 +1,4 @@
-// only-64bit
+// ignore-32bit
 
 #![warn(clippy::fn_to_numeric_cast, clippy::fn_to_numeric_cast_with_truncation)]
 

tests/ui/fn_to_numeric_cast_32bit.rs

@@ -0,0 +1,55 @@
+// ignore-64bit
+
+#![warn(clippy::fn_to_numeric_cast, clippy::fn_to_numeric_cast_with_truncation)]
+
+fn foo() -> String {
+    String::new()
+}
+
+fn test_function_to_numeric_cast() {
+    let _ = foo as i8;
+    let _ = foo as i16;
+    let _ = foo as i32;
+    let _ = foo as i64;
+    let _ = foo as i128;
+    let _ = foo as isize;
+
+    let _ = foo as u8;
+    let _ = foo as u16;
+    let _ = foo as u32;
+    let _ = foo as u64;
+    let _ = foo as u128;
+
+    // Casting to usize is OK and should not warn
+    let _ = foo as usize;
+
+    // Cast `f` (a `FnDef`) to `fn()` should not warn
+    fn f() {}
+    let _ = f as fn();
+}
+
+fn test_function_var_to_numeric_cast() {
+    let abc: fn() -> String = foo;
+
+    let _ = abc as i8;
+    let _ = abc as i16;
+    let _ = abc as i32;
+    let _ = abc as i64;
+    let _ = abc as i128;
+    let _ = abc as isize;
+
+    let _ = abc as u8;
+    let _ = abc as u16;
+    let _ = abc as u32;
+    let _ = abc as u64;
+    let _ = abc as u128;
+
+    // Casting to usize is OK and should not warn
+    let _ = abc as usize;
+}
+
+fn fn_with_fn_args(f: fn(i32) -> i32) -> i32 {
+    f as i32
+}
+
+fn main() {}