Remove tokenstream::Delimited.
#56369
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r? @eddyb (rust_highfive has picked a reviewer for you, use r? to override) |
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Marking as blocked on #49219. |
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Why is it blocked on #49219? |
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☔ The latest upstream changes (presumably #49219) made this pull request unmergeable. Please resolve the merge conflicts. |
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@nnethercote |
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#49219 has landed; @nnethercote should be able to rebase this now. :) |
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@eddyb: I have rebased. |
src/libsyntax/tokenstream.rs
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@bors r+ |
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📌 Commit 8e4ccef845e2870b60b08d77960b550f13ade2d3 has been approved by |
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In case you'll want to fix #56369 (comment) |
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✌️ @nnethercote can now approve this pull request |
Because it's an extra type layer that doesn't really help; in a couple of places it actively gets in the way, and overall removing it makes the code nicer. It does, however, move `tokenstream::TokenTree` further away from the `TokenTree` in `quote.rs`. More importantly, this change reduces the size of `TokenStream` from 48 bytes to 40 bytes on x86-64, which is enough to slightly reduce instruction counts on numerous benchmarks, the best by 1.5%. Note that `open_tt` and `close_tt` have gone from being methods on `Delimited` to associated methods of `TokenTree`.
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I addressed the nits. @bors r=petrochenkov |
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📌 Commit 1fe2c03 has been approved by |
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Remove `tokenstream::Delimited`. Because it's an extra type layer that doesn't really help; in a couple of places it actively gets in the way, and overall removing it makes the code nicer. It does, however, move `tokenstream::TokenTree` further away from the `TokenTree` in `quote.rs`. More importantly, this change reduces the size of `TokenStream` from 48 bytes to 40 bytes on x86-64, which is enough to slightly reduce instruction counts on numerous benchmarks, the best by 1.5%. Note that `open_tt` and `close_tt` have gone from being methods on `Delimited` to associated methods of `TokenTree`.
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☀️ Test successful - status-appveyor, status-travis |
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Because it's an extra type layer that doesn't really help; in a couple
of places it actively gets in the way, and overall removing it makes the
code nicer. It does, however, move
tokenstream::TokenTreefurther awayfrom the
TokenTreeinquote.rs.More importantly, this change reduces the size of
TokenStreamfrom 48bytes to 40 bytes on x86-64, which is enough to slightly reduce
instruction counts on numerous benchmarks, the best by 1.5%.
Note that
open_ttandclose_tthave gone from being methods onDelimitedto associated methods ofTokenTree.