[libstd_unicode] Change UNICODE_VERSION to use u32

Use `u32` for version components, as `u64` is just an overkill, and
`u32` is the default type for integers and the default type used for
regular internal numbers.

There's no expectation for Unicode Versions to even reach one thousand
in the next hundered years. This is different from *package versions*,
which may become something auto-generated and exceed human-friendly
range of integer values.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd_unicode/tables.rs b/src/libstd_unicode/tables.rs
index 0938738b52c..63ed5398872 100644
--- a/src/libstd_unicode/tables.rs
+++ b/src/libstd_unicode/tables.rs
@@ -14,7 +14,7 @@
 
 /// The version of [Unicode](http://www.unicode.org/)
 /// that the unicode parts of `CharExt` and `UnicodeStrPrelude` traits are based on.
-pub const UNICODE_VERSION: (u64, u64, u64) = (10, 0, 0);
+pub const UNICODE_VERSION: (u32, u32, u32) = (10, 0, 0);
 
 
 // BoolTrie is a trie for representing a set of Unicode codepoints. It is
diff --git a/src/libstd_unicode/unicode.py b/src/libstd_unicode/unicode.py
index 5f9def02c7d..5b921a946d1 100755
--- a/src/libstd_unicode/unicode.py
+++ b/src/libstd_unicode/unicode.py
@@ -562,7 +562,7 @@ if __name__ == "__main__":
         rf.write("""
 /// The version of [Unicode](http://www.unicode.org/)
 /// that the unicode parts of `CharExt` and `UnicodeStrPrelude` traits are based on.
-pub const UNICODE_VERSION: (u64, u64, u64) = (%s, %s, %s);
+pub const UNICODE_VERSION: (u32, u32, u32) = (%s, %s, %s);
 """ % unicode_version)
         (canon_decomp, compat_decomp, gencats, combines,
                 to_upper, to_lower, to_title) = load_unicode_data("UnicodeData.txt")