Move tts instead of cloning in expansion #28526
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This was referenced Sep 20, 2015
Manishearth
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This reduces some clones of `Vec`s. These are not deep copies since the token tree is made using `Rc`s, so this won't be a major improvement. r? @eddyb
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This reduces some clones of
Vecs. These are not deep copies since thetoken tree is made using
Rcs, so this won't be a major improvement.r? @eddyb