Clean up and streamline the pretty-printer #56336
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This commit converts some 2-space indents to 4-space indents.
They are unused. The commit also adds some blank lines between some methods.
`Printer::word` takes a `&str` and converts it into a `String`, which causes an allocation. But that allocation is rarely necessary, because `&str` is almost always a `&'static str` or a `String` that won't be used again. This commit changes `Token::String` so it holds a `Cow<'static, str>` instead of a `String`, which avoids a lot of allocations.
`pretty_print` takes a `Token` and `match`es on it. But the particular `Token` kind is known at each call site, so this commit splits it into five functions: `pretty_print_eof`, `pretty_print_begin`, etc. This commit also does likewise with `print`, though there is one callsite for `print` where the `Token` kind isn't known, so a generic `print` has to stay (but it now just calls out to the various `print_*` functions).
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src/libsyntax/print/pp.rs
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| } else { | ||
| self.advance_right(); | ||
| Token::Eof => { | ||
| if !self.scan_stack.is_empty() { |
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ah, 2 space indents. Blast from the past.
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@bors r+ |
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📌 Commit 64cd645 has been approved by |
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@bors rollup |
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…akis Clean up and streamline the pretty-printer Some minor improvements.
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…akis Clean up and streamline the pretty-printer Some minor improvements.
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Rollup of 19 pull requests Successful merges: - #55011 (Add libstd Cargo feature "panic_immediate_abort") - #55821 (Use sort_by_cached_key when the key function is not trivial/free) - #56014 (add test for issue #21335) - #56131 (Assorted tweaks) - #56214 (Implement chalk unification routines) - #56216 (Add TryFrom<&[T]> for [T; $N] where T: Copy) - #56268 (Reuse the `P` in `InvocationCollector::fold_{,opt_}expr`.) - #56324 (Use raw_entry for more efficient interning) - #56336 (Clean up and streamline the pretty-printer) - #56337 (Fix const_fn ICE with non-const function pointer) - #56339 (Remove not used option) - #56341 (Rename conversion util; remove duplicate util in librustc_codegen_llvm.) - #56349 (rustc 1.30.0's linker flavor inference is a non-backwards compat change to -Clinker) - #56355 (Add inline attributes and add unit to CommonTypes) - #56360 (Optimize local linkchecker program) - #56364 (Fix panic with outlives in existential type) - #56365 (Stabilize self_struct_ctor feature.) - #56367 (Moved some feature gate tests to correct location) - #56373 (Update books)
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☔ The latest upstream changes (presumably #56381) made this pull request unmergeable. Please resolve the merge conflicts. |
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| pub fn get(&self) -> &'static str { | ||
| self.string | ||
| } |
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@eddyb @nnethercote This function is unsound and should be removed.
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Some minor improvements.