diff options
Diffstat (limited to 'src/libstd/unstable/intrinsics.rs')
| -rw-r--r-- | src/libstd/unstable/intrinsics.rs | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/libstd/unstable/intrinsics.rs b/src/libstd/unstable/intrinsics.rs index c60edad3dbd..d2807303fb2 100644 --- a/src/libstd/unstable/intrinsics.rs +++ b/src/libstd/unstable/intrinsics.rs @@ -38,16 +38,34 @@ pub use realstd::unstable::intrinsics::{TyDesc, Opaque, TyVisitor}; pub type GlueFn = extern "Rust" fn(*i8); -// NB: this has to be kept in sync with the Rust ABI. +// NB: this has to be kept in sync with `type_desc` in `rt` #[lang="ty_desc"] #[cfg(not(test))] pub struct TyDesc { + // sizeof(T) size: uint, + + // alignof(T) align: uint, + + // Called on a copy of a value of type `T` *after* memcpy take_glue: GlueFn, + + // Called when a value of type `T` is no longer needed drop_glue: GlueFn, + + // Called by drop glue when a value of type `T` can be freed free_glue: GlueFn, + + // Called by reflection visitor to visit a value of type `T` visit_glue: GlueFn, + + // If T represents a box pointer (`@U` or `~U`), then + // `borrow_offset` is the amount that the pointer must be adjusted + // to find the payload. This is always derivable from the type + // `U`, but in the case of `@Trait` or `~Trait` objects, the type + // `U` is unknown. + borrow_offset: uint, } #[lang="opaque"] |