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Add a note about checks with multiple revisions #1963

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Apr 13, 2024
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Add a note about checks with multiple revisions #1963

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6 changes: 4 additions & 2 deletions src/tests/compiletest.md
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Expand Up @@ -593,8 +593,7 @@ You can therefore use `#[cfg(foo)]` etc within the test to tweak
each of these results.

You can also customize headers and expected error messages to a particular
revision. To do this, add `[foo]` (or `bar`, `baz`, etc) after the `//`
comment, like so:
revision. To do this, add `[revision-name]` after the `//` comment, like so:

```rust,ignore
// A flag to pass in only for cfg `foo`:
Expand All @@ -606,6 +605,9 @@ fn test_foo() {
}
```

Multiple revisions can be specified in a comma-separated list, such as
`//[foo,bar,baz]~^`.

In test suites that use the LLVM [FileCheck] tool, the current revision name is
also registered as an additional prefix for FileCheck directives:

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