Merge pull request #133 from stmonty/feat/support-unicode-identifiers

feat/support unicode identifiers

compiler+runtime/include/cpp/jank/read/lex.hpp

@@ -127,6 +127,7 @@ namespace jank::read
 
 namespace jank::read::lex
 {
+  struct codepoint;
   struct processor
   {
     struct iterator
@@ -150,9 +151,9 @@ namespace jank::read::lex
     processor(native_persistent_string_view const &f);
 
     result<token, error> next();
-    option<char> peek() const;
+    result<codepoint, error> peek() const;
     option<error> check_whitespace(native_bool const found_space);
-
+    
     iterator begin();
     iterator end();
 

compiler+runtime/include/cpp/jank/result.hpp

@@ -184,6 +184,25 @@ namespace jank
       return std::move(boost::get<R>(data));
     }
 
+    constexpr R &unwrap_or(R &fallback)
+    {
+      if(is_ok())
+      {
+        return boost::get<R>(data);
+      }
+      return fallback;
+    }
+
+    /* We don't take const& and return it since that's just asking for lifetime issues. */
+    constexpr R unwrap_or(R fallback) const
+    {
+      if(is_ok())
+      {
+        return boost::get<R>(data);
+      }
+      return std::move(fallback);
+    }
+
     constexpr native_bool operator==(result const &rhs) const
     {
       return rhs.data == data;