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reference: vtable entries are resolved at runtime #31677

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Feb 25, 2016
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reference: vtable entries are resolved at runtime #31677

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reference: vtable entries are resolved at runtime
ivan Feb 15, 2016
58f0d72
reference: vtable entries: copy @nikomatsakis's wording
ivan Feb 18, 2016
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5 changes: 3 additions & 2 deletions src/doc/reference.md
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Expand Up @@ -3564,8 +3564,9 @@ Each instance of a trait object includes:
each method of `SomeTrait` that `T` implements, a pointer to `T`'s
implementation (i.e. a function pointer).

The purpose of trait objects is to permit "late binding" of methods. A call to
a method on a trait object is only resolved to a vtable entry at compile time.
The purpose of trait objects is to permit "late binding" of methods. Calling a
method on a trait object results in virtual dispatch at runtime: that is, a
function pointer is loaded from the trait object vtable and invoked indirectly.
The actual implementation for each vtable entry can vary on an object-by-object
basis.

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