/// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
/// assign-expr ')'
/// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
-/// [OBJC] '[' objc-message-expr ']' [TODO]
+/// [OBJC] '[' objc-message-expr ']'
/// [OBJC] '@selector' '(' objc-selector-arg ')' [TODO]
-/// [OBJC] '@protocol' '(' identifier ')' [TODO]
-/// [OBJC] '@encode' '(' type-name ')' [TODO]
+/// [OBJC] '@protocol' '(' identifier ')'
+/// [OBJC] '@encode' '(' type-name ')'
/// [OBJC] objc-string-literal
/// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]
/// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1]