Open Bug 972403 Opened 10 years ago Updated 2 years ago

Add opaque() method that converts a *type descriptor* into an opaque type descriptor

Categories

(Core :: JavaScript Engine, defect)

Product:
Core
Component:
JavaScript Engine
Platform:
x86
Linux
Type:
defect

Tracking

()

People

(Reporter: nmatsakis, Unassigned)

References

Details

The typed object spec includes an opaque() method on type descriptors that can convert a transparent type descriptor into an opaque one. Opaque type descriptors are potentially more optimizable since they enforce stricter alignment and aliasing restrictions, because instances thereof can never be reinterpret casted into other types (moreover, an opaque type descriptor cannot be instantiated atop an arbitrary buffer).

Note: this is distinct from bug 972400, which refers to an opaque() function on individual *typed objects*, not the descriptors.
Blocks: harmony:typedobjects
Depends on: 898356
Severity: normal → S3
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