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21 lines
991 B
21 lines
991 B
# Example: Implementing Vec
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To bring everything together, we're going to write `std::Vec` from scratch.
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Because all the best tools for writing unsafe code are unstable, this
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project will only work on nightly (as of Rust 1.9.0). With the exception of the
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allocator API, much of the unstable code we'll use is expected to be stabilized
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in a similar form as it is today.
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However we will generally try to avoid unstable code where possible. In
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particular we won't use any intrinsics that could make a code a little
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bit nicer or efficient because intrinsics are permanently unstable. Although
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many intrinsics *do* become stabilized elsewhere (`std::ptr` and `str::mem`
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consist of many intrinsics).
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Ultimately this means our implementation may not take advantage of all
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possible optimizations, though it will be by no means *naive*. We will
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definitely get into the weeds over nitty-gritty details, even
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when the problem doesn't *really* merit it.
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You wanted advanced. We're gonna go advanced.
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