The docsearch function is now working.

luprex/cpp/core/util.hpp

@@ -110,6 +110,9 @@ bool is_lua_classname(string_view s);
 // Return true if the line of code is a lua comment.
 bool is_lua_comment(string_view s);
 
+// Return true if the line is a lua function prototype.
+bool is_lua_function_prototype(string_view s);
+
 // Return true if the line is entirely whitespace.
 bool is_whitespace(string_view s);
 
@@ -206,6 +209,13 @@ int32_t read_codepoint_utf8(string_view &source);
 //
 bool valid_utf8(string_view s);
 
+// Check if a UTF8 string contains a substring.
+//
+// Eventually, we're going to have a case-insensitive version of this,
+// but it's really hard to write!
+//
+bool contains_substring_utf8(string_view haystack, string_view needle);
+
 // Return true if the number conforms to the spec.
 // See read_number for more information.
 //