correct suggestion for `manual_div_ceil` lint (#13864)

fix #13843

The `manual_div_ceil` lint makes incorrect suggestion when type suffixes
need to be made explicit in the suggested code.

changelog: [`manual_div_ceil`]: suggested code now includes appropriate
type suffixes where necessary

6 files changed, 220 insertions, 2 deletions

diff --git a/tests/ui/manual_div_ceil.fixed b/tests/ui/manual_div_ceil.fixed
index e7801f7376a..1fb1df5b442 100644
--- a/tests/ui/manual_div_ceil.fixed
+++ b/tests/ui/manual_div_ceil.fixed
@@ -28,3 +28,25 @@ fn main() {
     let _ = (7_u32 as i32 + (y_i - 1)) / y_i;
     let _ = (7_u32 as i32 + (4 - 1)) / 4;
 }
+
+fn issue_13843() {
+    let x = 3usize;
+    let _ = 2048_usize.div_ceil(x);
+
+    let x = 5usize;
+    let _ = 2048usize.div_ceil(x);
+
+    let x = 5usize;
+    let _ = 2048_usize.div_ceil(x);
+
+    let x = 2048usize;
+    let _ = x.div_ceil(4);
+
+    let _: u32 = 2048_u32.div_ceil(6);
+    let _: usize = 2048_usize.div_ceil(6);
+    let _: u32 = 0x2048_u32.div_ceil(0x6);
+
+    let _ = 2048_u32.div_ceil(6u32);
+
+    let _ = 1_000_000_u32.div_ceil(6u32);
+}
diff --git a/tests/ui/manual_div_ceil.rs b/tests/ui/manual_div_ceil.rs
index 2de74c7eaa8..4f6d38f0d14 100644
--- a/tests/ui/manual_div_ceil.rs
+++ b/tests/ui/manual_div_ceil.rs
@@ -28,3 +28,25 @@ fn main() {
     let _ = (7_u32 as i32 + (y_i - 1)) / y_i;
     let _ = (7_u32 as i32 + (4 - 1)) / 4;
 }
+
+fn issue_13843() {
+    let x = 3usize;
+    let _ = (2048 + x - 1) / x;
+
+    let x = 5usize;
+    let _ = (2048usize + x - 1) / x;
+
+    let x = 5usize;
+    let _ = (2048_usize + x - 1) / x;
+
+    let x = 2048usize;
+    let _ = (x + 4 - 1) / 4;
+
+    let _: u32 = (2048 + 6 - 1) / 6;
+    let _: usize = (2048 + 6 - 1) / 6;
+    let _: u32 = (0x2048 + 0x6 - 1) / 0x6;
+
+    let _ = (2048 + 6u32 - 1) / 6u32;
+
+    let _ = (1_000_000 + 6u32 - 1) / 6u32;
+}
diff --git a/tests/ui/manual_div_ceil.stderr b/tests/ui/manual_div_ceil.stderr
index dc652dff405..3d87fe8e040 100644
--- a/tests/ui/manual_div_ceil.stderr
+++ b/tests/ui/manual_div_ceil.stderr
@@ -31,5 +31,59 @@ error: manually reimplementing `div_ceil`
 LL |     let _ = (7_i32 as u32 + (4 - 1)) / 4;
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `(7_i32 as u32).div_ceil(4)`
 
-error: aborting due to 5 previous errors
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:34:13
+   |
+LL |     let _ = (2048 + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:37:13
+   |
+LL |     let _ = (2048usize + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:40:13
+   |
+LL |     let _ = (2048_usize + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:43:13
+   |
+LL |     let _ = (x + 4 - 1) / 4;
+   |             ^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `x.div_ceil(4)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:45:18
+   |
+LL |     let _: u32 = (2048 + 6 - 1) / 6;
+   |                  ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_u32.div_ceil(6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:46:20
+   |
+LL |     let _: usize = (2048 + 6 - 1) / 6;
+   |                    ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:47:18
+   |
+LL |     let _: u32 = (0x2048 + 0x6 - 1) / 0x6;
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `0x2048_u32.div_ceil(0x6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:49:13
+   |
+LL |     let _ = (2048 + 6u32 - 1) / 6u32;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_u32.div_ceil(6u32)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil.rs:51:13
+   |
+LL |     let _ = (1_000_000 + 6u32 - 1) / 6u32;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `1_000_000_u32.div_ceil(6u32)`
+
+error: aborting due to 14 previous errors
 
diff --git a/tests/ui/manual_div_ceil_with_feature.fixed b/tests/ui/manual_div_ceil_with_feature.fixed
index a1d678c6689..f32b78aa14d 100644
--- a/tests/ui/manual_div_ceil_with_feature.fixed
+++ b/tests/ui/manual_div_ceil_with_feature.fixed
@@ -23,3 +23,30 @@ fn main() {
 
     let _ = (x + (y - 1)) / z;
 }
+
+fn issue_13843() {
+    let x = 3usize;
+    let _ = 2048_usize.div_ceil(x);
+
+    let x = 5usize;
+    let _ = 2048usize.div_ceil(x);
+
+    let x = 5usize;
+    let _ = 2048_usize.div_ceil(x);
+
+    let x = 2048usize;
+    let _ = x.div_ceil(4);
+
+    let _ = 2048_i32.div_ceil(4);
+
+    let _: u32 = 2048_u32.div_ceil(6);
+    let _: usize = 2048_usize.div_ceil(6);
+    let _: u32 = 0x2048_u32.div_ceil(0x6);
+
+    let _ = 2048_u32.div_ceil(6u32);
+
+    let x = -2;
+    let _ = (-2048_i32).div_ceil(x);
+
+    let _ = 1_000_000_u32.div_ceil(6u32);
+}
diff --git a/tests/ui/manual_div_ceil_with_feature.rs b/tests/ui/manual_div_ceil_with_feature.rs
index 58cb1dbe34d..54d89fcbd46 100644
--- a/tests/ui/manual_div_ceil_with_feature.rs
+++ b/tests/ui/manual_div_ceil_with_feature.rs
@@ -23,3 +23,30 @@ fn main() {
 
     let _ = (x + (y - 1)) / z;
 }
+
+fn issue_13843() {
+    let x = 3usize;
+    let _ = (2048 + x - 1) / x;
+
+    let x = 5usize;
+    let _ = (2048usize + x - 1) / x;
+
+    let x = 5usize;
+    let _ = (2048_usize + x - 1) / x;
+
+    let x = 2048usize;
+    let _ = (x + 4 - 1) / 4;
+
+    let _ = (2048 + 4 - 1) / 4;
+
+    let _: u32 = (2048 + 6 - 1) / 6;
+    let _: usize = (2048 + 6 - 1) / 6;
+    let _: u32 = (0x2048 + 0x6 - 1) / 0x6;
+
+    let _ = (2048 + 6u32 - 1) / 6u32;
+
+    let x = -2;
+    let _ = (-2048 + x - 1) / x;
+
+    let _ = (1_000_000 + 6u32 - 1) / 6u32;
+}
diff --git a/tests/ui/manual_div_ceil_with_feature.stderr b/tests/ui/manual_div_ceil_with_feature.stderr
index 361ef9bd9f4..c5e8c1a687c 100644
--- a/tests/ui/manual_div_ceil_with_feature.stderr
+++ b/tests/ui/manual_div_ceil_with_feature.stderr
@@ -43,5 +43,71 @@ error: manually reimplementing `div_ceil`
 LL |     let _ = (z_u + (4 - 1)) / 4;
    |             ^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `z_u.div_ceil(4)`
 
-error: aborting due to 7 previous errors
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:29:13
+   |
+LL |     let _ = (2048 + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:32:13
+   |
+LL |     let _ = (2048usize + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:35:13
+   |
+LL |     let _ = (2048_usize + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:38:13
+   |
+LL |     let _ = (x + 4 - 1) / 4;
+   |             ^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `x.div_ceil(4)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:40:13
+   |
+LL |     let _ = (2048 + 4 - 1) / 4;
+   |             ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_i32.div_ceil(4)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:42:18
+   |
+LL |     let _: u32 = (2048 + 6 - 1) / 6;
+   |                  ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_u32.div_ceil(6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:43:20
+   |
+LL |     let _: usize = (2048 + 6 - 1) / 6;
+   |                    ^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_usize.div_ceil(6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:44:18
+   |
+LL |     let _: u32 = (0x2048 + 0x6 - 1) / 0x6;
+   |                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `0x2048_u32.div_ceil(0x6)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:46:13
+   |
+LL |     let _ = (2048 + 6u32 - 1) / 6u32;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `2048_u32.div_ceil(6u32)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:49:13
+   |
+LL |     let _ = (-2048 + x - 1) / x;
+   |             ^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `(-2048_i32).div_ceil(x)`
+
+error: manually reimplementing `div_ceil`
+  --> tests/ui/manual_div_ceil_with_feature.rs:51:13
+   |
+LL |     let _ = (1_000_000 + 6u32 - 1) / 6u32;
+   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using `.div_ceil()`: `1_000_000_u32.div_ceil(6u32)`
+
+error: aborting due to 18 previous errors