diff options
Diffstat (limited to 'compiler/rustc_data_structures/src')
| -rw-r--r-- | compiler/rustc_data_structures/src/steal.rs | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/compiler/rustc_data_structures/src/steal.rs b/compiler/rustc_data_structures/src/steal.rs index 9a0fd52677d..0f2c0eee27d 100644 --- a/compiler/rustc_data_structures/src/steal.rs +++ b/compiler/rustc_data_structures/src/steal.rs @@ -51,6 +51,15 @@ impl<T> Steal<T> { let value = value_ref.take(); value.expect("attempt to steal from stolen value") } + + /// Writers of rustc drivers often encounter stealing issues. This function makes it possible to + /// handle these errors gracefully. + /// + /// This should not be used within rustc as it leaks information not tracked + /// by the query system, breaking incremental compilation. + pub fn is_stolen(&self) -> bool { + self.value.borrow().is_none() + } } impl<CTX, T: HashStable<CTX>> HashStable<CTX> for Steal<T> { |