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| author | bors[bot] <26634292+bors[bot]@users.noreply.github.com> | 2021-03-17 07:20:28 +0000 |
|---|---|---|
| committer | GitHub <[email protected]> | 2021-03-17 07:20:28 +0000 |
| commit | 6fcb5d772f16af0d1f62dad55fbde75072fb9e89 (patch) | |
| tree | e4ddd896f9ca8ca1f99c346a49104b04bc4ca04c /docs/dev | |
| parent | 83e6940efb42675226adb8d2856c095b8dce36c5 (diff) | |
| parent | a79b5673e8f5d1f8d569bc7c984a293a972a7bb0 (diff) | |
Merge #8048
8048: Fix missing unresolved macro diagnostic in function body r=edwin0cheng a=brandondong
This was an issue I found while working on https://github.com/rust-analyzer/rust-analyzer/pull/7970.
**Reproduction:**
1. Call a non-existent macro in a function body.
```
fn main() {
foo!();
}
```
2. No diagnostics are raised. An unresolved-macro-call diagnostic is expected.
3. If the macro call is instead outside of the function body, this works as expected.
I believe this worked previously and regressed in https://github.com/rust-analyzer/rust-analyzer/pull/7805.
**Behavior prior to https://github.com/rust-analyzer/rust-analyzer/pull/7805:**
- The unresolved-macro-call diagnostic did not exist. Instead, a macro-error diagnostic would be raised with the text "could not resolve macro [path]".
- This was implemented by adding an error to the error sink (https://github.com/rust-analyzer/rust-analyzer/pull/7805/files#diff-50a326c5ae465bd9b31ee4310186380aa06e4fa1f6b41dbc0aed5bcc656a3cb8L657).
- The error was propagated through https://github.com/rust-analyzer/rust-analyzer/blob/1a82af3527e476d52410ff4dfd2fb4c57466abcb/crates/hir_def/src/body.rs#L123 eventually reaching https://github.com/rust-analyzer/rust-analyzer/blob/1a82af3527e476d52410ff4dfd2fb4c57466abcb/crates/hir_def/src/body/lower.rs#L569.
**Behavior after:**
- Instead of writing to the error sink, an UnresolvedMacro error is now returned (https://github.com/rust-analyzer/rust-analyzer/pull/7805/files#diff-50a326c5ae465bd9b31ee4310186380aa06e4fa1f6b41dbc0aed5bcc656a3cb8R631).
- The parent caller throws away the error as its function signature is `Option<MacroCallId>` (https://github.com/rust-analyzer/rust-analyzer/pull/7805/files#diff-50a326c5ae465bd9b31ee4310186380aa06e4fa1f6b41dbc0aed5bcc656a3cb8R604).
- We instead now reach the warn condition (https://github.com/rust-analyzer/rust-analyzer/blob/1a82af3527e476d52410ff4dfd2fb4c57466abcb/crates/hir_def/src/body.rs#L124) and no diagnostics are created in https://github.com/rust-analyzer/rust-analyzer/blob/1a82af3527e476d52410ff4dfd2fb4c57466abcb/crates/hir_def/src/body/lower.rs#L575.
**Fix:**
- Make sure to propagate the UnresolvedMacro error. Report the error using the new unresolved-macro-call diagnostic.
Co-authored-by: Brandon <[email protected]>
Diffstat (limited to 'docs/dev')
0 files changed, 0 insertions, 0 deletions