💡 Update in-code documents

Doxyfile

@@ -928,7 +928,7 @@ WARN_LOGFILE           =
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = docs ild langs
+INPUT                  = docs lilac langs
 
 # This tag can be used to specify the character encoding of the source files
 # that Doxygen parses. Internally Doxygen uses the UTF-8 encoding. Doxygen uses

lilac/compilesymbolsubcommand.h

@@ -24,6 +24,9 @@
 
 namespace lilac
 {
+    /**
+     * @brief A sub-command that compiles assemblies into symbols
+     */
     class CompileSymbolSubCommand final : public SubCommand
     {
         llvm::cl::opt<shared::FrontendKind> Language;

lilac/generatesubcommand.h

@@ -24,6 +24,9 @@
 
 namespace lilac
 {
+    /**
+     * @brief A sub-command that generates bindings from symbols
+     */
     class GenerateSubCommand final : public SubCommand
     {
         llvm::cl::opt<std::string>         OutputPath;

lilac/subcommand.h

@@ -23,13 +23,25 @@
 
 namespace lilac
 {
+    /**
+     * @brief An abstraction class of `llvm::cl::SubCommand`
+     */
     class SubCommand
     {
         llvm::cl::SubCommand m_SubCommand;
 
     public:
+        /**
+         * @brief Creates a sub-command with given name and description
+         * @param command A name of the sub-command
+         * @param desc A description of the sub-command
+         */
         SubCommand(const char* command, const char* desc);
 
+        /**
+         * @brief Runs a subcommand
+         * @return Zero will be returned when completed successfully; otherwise, non-zero will be returned
+         */
         virtual int Run() = 0;
 
         virtual ~SubCommand() = default;
@@ -38,6 +50,10 @@ namespace lilac
 
         operator bool() const;
 
+        /**
+         * @brief Gets default category of all sub-commands registered by LILAC
+         * @return Returns default category of all sub-commands registered by LILAC
+         */
         static llvm::cl::OptionCategory& GetCategory();
     };
 }