Add function for Unicode NFC normalization

gcc/rust/ChangeLog:

	* Make-lang.in: Add rust-unicode.o
	* rust-lang.cc (run_rust_tests): Add test.
	* rust-system.h: Include <array>
	* util/make-rust-unicode.py: Generater of rust-unicode-data.h.
	* util/rust-unicode-data.h: Auto-generated file.
	* util/rust-unicode.cc: New file.
	* util/rust-unicode.h: New file.

Signed-off-by: Raiki Tamura <[email protected]>

Author: tamaroning

gcc/rust/rust-session-manager.cc

@@ -126,7 +126,12 @@ validate_crate_name (const std::string &crate_name, Error &error)
     }
   for (auto &c : crate_name)
     {
-      if (!(ISALNUM (c) || c == '_'))
+      std::cout << "check for " << c.as_string () << std::endl;
+      std::cout << is_alphabetic (c.value);
+      std::cout << "is_al_ok" << std::endl;
+      std::cout << is_numeric (c.value);
+      std::cout << "is_num_ok" << std::endl;
+      if (!(is_alphabetic (c.value) || is_numeric (c.value) || c.value == '_'))
 	{
 	  error = Error (UNDEF_LOCATION,
 			 "invalid character %<%c%> in crate name: %<%s%>", c,
@@ -1226,6 +1231,8 @@ namespace selftest {
 void
 rust_crate_name_validation_test (void)
 {
+  std::cout << "1 is numeric?" << Rust::is_numeric ('1') << std::endl;
+
   auto error = Rust::Error (UNDEF_LOCATION, std::string ());
   ASSERT_TRUE (Rust::validate_crate_name ("example", error));
   ASSERT_TRUE (Rust::validate_crate_name ("abcdefg_1234", error));