bors fd0a3313f7 Auto merge of #112261 - jieyouxu:c-like-ptr-arithmetics-diagnostics, r=WaffleLapkin ... Add help for trying to do C-like pointer arithmetics This PR adds help messages for these cases: ```rust fn main() { let ptr1: *const u32 = std::ptr::null(); let ptr2: *const u32 = std::ptr::null(); let a = ptr1 + 5; let b = ptr1 - 5; let c = ptr2 - ptr1; let d = ptr1[5]; } ``` ### Current Output ``` error[E0369]: cannot add `{integer}` to `*const u32` --> tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs:4:18 | 4 | let a = ptr1 + 5; //~ ERROR cannot add | ---- ^ - {integer} | | | *const u32 error[E0369]: cannot subtract `{integer}` from `*const u32` --> tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs:5:18 | 5 | let b = ptr1 - 5; //~ ERROR cannot subtract | ---- ^ - {integer} | | | *const u32 error[E0369]: cannot subtract `*const u32` from `*const u32` --> tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs:6:18 | 6 | let c = ptr2 - ptr1; //~ ERROR cannot subtract | ---- ^ ---- *const u32 | | | *const u32 error[E0608]: cannot index into a value of type `*const u32` --> tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs:7:13 | 7 | let d = ptr1[5]; //~ ERROR cannot index | ^^^^^^^ error: aborting due to 4 previous errors ``` ### Output After This PR ``` error[E0369]: cannot add `{integer}` to `*const u32` --> $DIR/issue-112252-ptr-arithmetics-help.rs:6:20 | LL | let _a = _ptr1 + 5; | ------^-- | | | | | {integer} | *const u32 | help: consider using `wrapping_add` or `add` for pointer + {integer}: `_ptr1.wrapping_add(5)` error[E0369]: cannot subtract `{integer}` from `*const u32` --> $DIR/issue-112252-ptr-arithmetics-help.rs:7:20 | LL | let _b = _ptr1 - 5; | ------^-- | | | | | {integer} | *const u32 | help: consider using `offset` for pointer - {integer}: `unsafe { _ptr1.offset(-5) }` error[E0369]: cannot subtract `*const u32` from `*const u32` --> $DIR/issue-112252-ptr-arithmetics-help.rs:8:20 | LL | let _c = _ptr2 - _ptr1; | ------^------ | | | | | *const u32 | *const u32 | help: consider using `offset_from` for pointer - pointer if the pointers point to the same allocation: `_ptr2.offset_from(_ptr1)` error[E0608]: cannot index into a value of type `*const u32` --> $DIR/issue-112252-ptr-arithmetics-help.rs:9:14 | LL | let _d = _ptr1[5]; | ^^^^^^^^ | help: consider using `wrapping_add` or `add` for indexing into raw pointer | LL | let _d = _ptr1.wrapping_add(5); | ~~~~~~~~~~~~~~~~~~~~~ error: aborting due to 4 previous errors ``` Closes #112252.		2023-06-12 07:15:19 +00:00
..
assembly	Fix linkage for large binaries on mips64 platforms ...	2023-05-29 10:57:03 -06:00
auxiliary
codegen	Use load-store instead of memcpy for short integer arrays	2023-06-04 00:51:49 -07:00
codegen-units	Turn off inlining for codegen-unit tests	2023-04-07 15:46:45 -04:00
debuginfo	Add multiple borrow test.	2023-05-13 10:32:32 +00:00
incremental	Implement custom diagnostic for ConstParamTy	2023-06-01 18:21:42 +00:00
mir-opt	Auto merge of #112240 - cjgillot:recurse-inline, r=scottmcm	2023-06-04 03:39:24 +00:00
pretty	Rollup merge of #111042 - Zalathar:no-coverage, r=wesleywiser	2023-05-01 17:10:24 +02:00
run-make	Auto merge of #111626 - pjhades:output, r=b-naber	2023-06-09 09:45:40 +00:00
run-make-fulldeps	Auto merge of #111626 - pjhades:output, r=b-naber	2023-06-09 09:45:40 +00:00
run-pass-valgrind
rustdoc	Auto merge of #107637 - fmease:rustdoc-reelide-x-crate-def-tr-obj-lt-bnds, r=notriddle,cgillot,GuillaumeGomez	2023-06-10 18:28:14 +00:00
rustdoc-gui	Migrate GUI colors test to original CSS color format	2023-06-10 14:38:08 +02:00
rustdoc-js	rustdoc: add note about slice/array searches to help popup	2023-06-10 14:08:26 -07:00
rustdoc-js-std	rustdoc: add note about slice/array searches to help popup	2023-06-10 14:08:26 -07:00
rustdoc-json	Serialize all enums as externally tagged to guarantee compatibility with binary formats such as bincode or postcard	2023-05-22 18:22:08 +01:00
rustdoc-ui	rustdoc: get unnormalized link destination for suggestions	2023-05-26 18:38:46 -07:00
ui	Auto merge of #112261 - jieyouxu:c-like-ptr-arithmetics-diagnostics, r=WaffleLapkin	2023-06-12 07:15:19 +00:00
ui-fulldeps	Use translatable diagnostics in rustc_const_eval	2023-06-01 14:45:18 +00:00
COMPILER_TESTS.md