From fc17c7fc37b6fe22784d393825cc3861b0ad9ca4 Mon Sep 17 00:00:00 2001
From: Ryan Lopopolo <rjl@hyperbo.la>
Date: Fri, 28 Aug 2020 08:36:12 -0700
Subject: [PATCH] Make mapping::lookup const

Raises the minimum Rust version to 1.46.0
---
 scripts/gen_case_lookups.rb          | 4 ++--
 src/folding/mapping/lookup.rs        | 6 +++---
 tests/full_fold_exhaustive.rs        | 2 +-
 tests/full_turkic_fold_exhaustive.rs | 2 +-
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/scripts/gen_case_lookups.rb b/scripts/gen_case_lookups.rb
index a8567ca5..04abef40 100755
--- a/scripts/gen_case_lookups.rb
+++ b/scripts/gen_case_lookups.rb
@@ -75,8 +75,8 @@
   #[must_use]
   #[allow(clippy::match_same_arms)]
   #[allow(clippy::too_many_lines)]
-  pub fn lookup(c: char, mode: Mode) -> Mapping {
-      let char_bytes = u32::from(c).to_be_bytes();
+  pub const fn lookup(c: char, mode: Mode) -> Mapping {
+      let char_bytes = (c as u32).to_be_bytes();
       let mid_byte = char_bytes[2];
       let high_bytes = u16::from_be_bytes([char_bytes[0], char_bytes[1]]);
       match (high_bytes, mid_byte) {
diff --git a/src/folding/mapping/lookup.rs b/src/folding/mapping/lookup.rs
index baa53da0..eabf3750 100644
--- a/src/folding/mapping/lookup.rs
+++ b/src/folding/mapping/lookup.rs
@@ -1,7 +1,7 @@
 // This source is autogenerated. Do not modify it directly.
 // To make modfications to this code, see `scripts/gen_case_lookups.rb`.
 //
-// Last generated on 2020-08-22 00:52:59 UTC.
+// Last generated on 2020-08-28 15:34:55 UTC.
 //
 // Unicode version:
 // CaseFolding-13.0.0.txt
@@ -13,8 +13,8 @@ use super::{Mapping, Mode};
 #[must_use]
 #[allow(clippy::match_same_arms)]
 #[allow(clippy::too_many_lines)]
-pub fn lookup(c: char, mode: Mode) -> Mapping {
-    let char_bytes = u32::from(c).to_be_bytes();
+pub const fn lookup(c: char, mode: Mode) -> Mapping {
+    let char_bytes = (c as u32).to_be_bytes();
     let mid_byte = char_bytes[2];
     let high_bytes = u16::from_be_bytes([char_bytes[0], char_bytes[1]]);
     match (high_bytes, mid_byte) {
diff --git a/tests/full_fold_exhaustive.rs b/tests/full_fold_exhaustive.rs
index 59d9082f..2cbae29d 100644
--- a/tests/full_fold_exhaustive.rs
+++ b/tests/full_fold_exhaustive.rs
@@ -1,7 +1,7 @@
 // This source is autogenerated. Do not modify it directly.
 // To make modfications to this code, see `scripts/gen_case_lookups.rb`.
 //
-// Last generated on 2020-08-22 00:52:59 UTC.
+// Last generated on 2020-08-28 15:34:55 UTC.
 //
 // Unicode version:
 // CaseFolding-13.0.0.txt
diff --git a/tests/full_turkic_fold_exhaustive.rs b/tests/full_turkic_fold_exhaustive.rs
index 0b0dd293..e49b8b4c 100644
--- a/tests/full_turkic_fold_exhaustive.rs
+++ b/tests/full_turkic_fold_exhaustive.rs
@@ -1,7 +1,7 @@
 // This source is autogenerated. Do not modify it directly.
 // To make modfications to this code, see `scripts/gen_case_lookups.rb`.
 //
-// Last generated on 2020-08-22 00:52:59 UTC.
+// Last generated on 2020-08-28 15:34:55 UTC.
 //
 // Unicode version:
 // CaseFolding-13.0.0.txt