From 9150ce272e15c2c9153bc194db79eb38eaff7195 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sat, 8 Oct 2022 12:20:32 -0700
Subject: [PATCH] Pull out static generated file heading into one string
 literal

---
 generate/src/write.rs | 39 +++++++++++++++++----------------------
 1 file changed, 17 insertions(+), 22 deletions(-)

diff --git a/generate/src/write.rs b/generate/src/write.rs
index ad657ac..fb7f450 100644
--- a/generate/src/write.rs
+++ b/generate/src/write.rs
@@ -1,30 +1,25 @@
 use crate::output::Output;
 use crate::{is_xid_continue, is_xid_start, CHUNK};
 
+const HEAD: &str = "\
+// \x40generated by ../generate. To regenerate, run the following in the repo root:
+//
+// $ curl -LO https://www.unicode.org/Public/zipped/14.0.0/UCD.zip
+// $ unzip UCD.zip -d UCD
+// $ cargo run --manifest-path generate/Cargo.toml
+
+const T: bool = true;
+const F: bool = false;
+
+#[repr(C, align(8))]
+pub(crate) struct Align8<T>(pub(crate) T);
+#[repr(C, align(64))]
+pub(crate) struct Align64<T>(pub(crate) T);
+";
+
 pub fn output(index_start: &[u8], index_continue: &[u8], halfdense: &[u8]) -> Output {
     let mut out = Output::new();
-    writeln!(
-        out,
-        "// \x40generated by ../generate. To regenerate, run the following in the repo root:",
-    );
-    writeln!(out, "//");
-    writeln!(
-        out,
-        "// $ curl -LO https://www.unicode.org/Public/zipped/14.0.0/UCD.zip",
-    );
-    writeln!(out, "// $ unzip UCD.zip -d UCD");
-    writeln!(out, "// $ cargo run --manifest-path generate/Cargo.toml");
-    writeln!(out);
-
-    writeln!(out, "const T: bool = true;");
-    writeln!(out, "const F: bool = false;");
-    writeln!(out);
-
-    writeln!(out, "#[repr(C, align(8))]");
-    writeln!(out, "pub(crate) struct Align8<T>(pub(crate) T);");
-    writeln!(out, "#[repr(C, align(64))]");
-    writeln!(out, "pub(crate) struct Align64<T>(pub(crate) T);");
-    writeln!(out);
+    writeln!(out, "{}", HEAD);
 
     writeln!(
         out,