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| author | 许杰友 Jieyou Xu (Joe) <jieyouxu@outlook.com> | 2023-06-04 10:18:09 +0800 |
|---|---|---|
| committer | 许杰友 Jieyou Xu (Joe) <jieyouxu@outlook.com> | 2023-06-09 10:01:16 +0800 |
| commit | 63d643da841bedd6b855f617edecc0b13c0cd71e (patch) | |
| tree | dd76f9ba433420e012df2988e2c77836146f352d /tests | |
| parent | 8b35c0bb0f833c0077dc57006eb317edde2a2d1e (diff) | |
| download | rust-63d643da841bedd6b855f617edecc0b13c0cd71e.tar.gz rust-63d643da841bedd6b855f617edecc0b13c0cd71e.zip | |
Add help for trying to do C-like pointer arithmetics
Diffstat (limited to 'tests')
3 files changed, 74 insertions, 0 deletions
diff --git a/tests/ui/typeck/issue-112252-ptr-arithmetics-help.fixed b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.fixed new file mode 100644 index 00000000000..bdb884f5431 --- /dev/null +++ b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.fixed @@ -0,0 +1,10 @@ +// run-rustfix + +fn main() { + let _ptr1: *const u32 = std::ptr::null(); + let _ptr2: *const u32 = std::ptr::null(); + let _a = _ptr1.wrapping_add(5); //~ ERROR cannot add + let _b = _ptr1.wrapping_sub(5); //~ ERROR cannot subtract + let _c = unsafe { _ptr2.offset_from(_ptr1) }; //~ ERROR cannot subtract + let _d = _ptr1.wrapping_add(5); //~ ERROR cannot index +} diff --git a/tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs new file mode 100644 index 00000000000..cf68850cc4d --- /dev/null +++ b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.rs @@ -0,0 +1,10 @@ +// run-rustfix + +fn main() { + let _ptr1: *const u32 = std::ptr::null(); + let _ptr2: *const u32 = std::ptr::null(); + let _a = _ptr1 + 5; //~ ERROR cannot add + let _b = _ptr1 - 5; //~ ERROR cannot subtract + let _c = _ptr2 - _ptr1; //~ ERROR cannot subtract + let _d = _ptr1[5]; //~ ERROR cannot index +} diff --git a/tests/ui/typeck/issue-112252-ptr-arithmetics-help.stderr b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.stderr new file mode 100644 index 00000000000..c55930da225 --- /dev/null +++ b/tests/ui/typeck/issue-112252-ptr-arithmetics-help.stderr @@ -0,0 +1,54 @@ +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} + | +LL | let _a = _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 `wrapping_sub` or `sub` for pointer - {integer} + | +LL | let _b = _ptr1.wrapping_sub(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 + | +LL | let _c = unsafe { _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 + +Some errors have detailed explanations: E0369, E0608. +For more information about an error, try `rustc --explain E0369`. |