From d761144daf92ce6aed83165aa840a1ae72bd0bb2 Mon Sep 17 00:00:00 2001
From: Kevin Butler <haqkrs@gmail.com>
Date: Tue, 8 Mar 2016 23:01:14 +0000
Subject: [PATCH] Add an impl of PhfHash for UniCase

Fixes #21
---
 phf/Cargo.toml              |  1 +
 phf_codegen/test/Cargo.toml |  7 +++++++
 phf_codegen/test/build.rs   | 12 ++++++++++++
 phf_codegen/test/src/lib.rs | 11 +++++++++++
 phf_shared/Cargo.toml       |  3 +++
 phf_shared/src/lib.rs       | 11 +++++++++++
 6 files changed, 45 insertions(+)

diff --git a/phf/Cargo.toml b/phf/Cargo.toml
index d75964a8..93a9b9a0 100644
--- a/phf/Cargo.toml
+++ b/phf/Cargo.toml
@@ -14,6 +14,7 @@ test = false
 
 [features]
 core = ["phf_shared/core"]
+unicase = ["phf_shared/unicase"]
 
 [dependencies]
 phf_shared = { version = "=0.7.13", path = "../phf_shared" }
diff --git a/phf_codegen/test/Cargo.toml b/phf_codegen/test/Cargo.toml
index 1c32f68c..cc62ba2a 100644
--- a/phf_codegen/test/Cargo.toml
+++ b/phf_codegen/test/Cargo.toml
@@ -4,8 +4,15 @@ authors = ["Steven Fackler <sfackler@gmail.com>"]
 version = "0.0.0"
 build = "build.rs"
 
+[dependencies]
+unicase = "1.1"
+
+[build-dependencies]
+unicase = "1.1"
+
 [build-dependencies.phf_codegen]
 path = ".."
 
 [dependencies.phf]
 path = "../../phf"
+features = ["unicase"]
diff --git a/phf_codegen/test/build.rs b/phf_codegen/test/build.rs
index 6fd95b3b..49b5a9ab 100644
--- a/phf_codegen/test/build.rs
+++ b/phf_codegen/test/build.rs
@@ -1,10 +1,13 @@
 extern crate phf_codegen;
+extern crate unicase;
 
 use std::env;
 use std::fs::File;
 use std::io::{BufWriter, Write};
 use std::path::Path;
 
+use unicase::UniCase;
+
 fn main() {
     let file = Path::new(&env::var("OUT_DIR").unwrap()).join("codegen.rs");
     let mut file = BufWriter::new(File::create(&file).unwrap());
@@ -53,4 +56,13 @@ fn main() {
         .build(&mut file)
         .unwrap();
     write!(&mut file, ";\n").unwrap();
+
+    write!(&mut file, "static UNICASE_MAP: ::phf::Map<::unicase::UniCase<&'static str>, \
+                                                      &'static str> = ").unwrap();
+    phf_codegen::Map::new()
+        .entry(UniCase("abc"), "\"a\"")
+        .entry(UniCase("DEF"), "\"b\"")
+        .build(&mut file)
+        .unwrap();
+    write!(&mut file, ";\n").unwrap();
 }
diff --git a/phf_codegen/test/src/lib.rs b/phf_codegen/test/src/lib.rs
index 3e50383d..a5aeeee2 100644
--- a/phf_codegen/test/src/lib.rs
+++ b/phf_codegen/test/src/lib.rs
@@ -1,7 +1,10 @@
 extern crate phf;
+extern crate unicase;
 
 #[cfg(test)]
 mod test {
+    use unicase::UniCase;
+
     include!(concat!(env!("OUT_DIR"), "/codegen.rs"));
 
     #[test]
@@ -44,4 +47,12 @@ mod test {
         assert_eq!(2, STR_KEYS["b"]);
         assert_eq!(3, STR_KEYS["c"]);
     }
+
+    #[test]
+    fn unicase_map() {
+        assert_eq!("a", UNICASE_MAP[&UniCase("AbC")]);
+        assert_eq!("a", UNICASE_MAP[&UniCase("abc")]);
+        assert_eq!("b", UNICASE_MAP[&UniCase("DEf")]);
+        assert!(!UNICASE_MAP.contains_key(&UniCase("XyZ")));
+    }
 }
diff --git a/phf_shared/Cargo.toml b/phf_shared/Cargo.toml
index 2dad2e5b..5e08f92a 100644
--- a/phf_shared/Cargo.toml
+++ b/phf_shared/Cargo.toml
@@ -14,3 +14,6 @@ test = false
 
 [features]
 core = []
+
+[dependencies]
+unicase = { version = "1.1", optional = true }
diff --git a/phf_shared/src/lib.rs b/phf_shared/src/lib.rs
index 00bcb109..404a0b70 100644
--- a/phf_shared/src/lib.rs
+++ b/phf_shared/src/lib.rs
@@ -3,6 +3,9 @@
 #[cfg(not(feature = "core"))]
 extern crate std as core;
 
+#[cfg(feature = "unicase")]
+extern crate unicase;
+
 use core::hash::{Hasher, Hash, SipHasher};
 
 #[inline]
@@ -103,6 +106,14 @@ impl PhfHash for [u8] {
     }
 }
 
+#[cfg(feature = "unicase")]
+impl<S> PhfHash for unicase::UniCase<S>
+where unicase::UniCase<S>: Hash {
+    #[inline]
+    fn phf_hash<H: Hasher>(&self, state: &mut H) {
+        self.hash(state)
+    }
+}
 
 macro_rules! sip_impl(
     (le $t:ty) => (