Pasted

 In file included from parser-cat.cc:34:
./parser.hh:173:1: warning: declaration does not declare anything [-Wmissing-declarations]
enum {
^
In file included from parser-cat.cc:35:
./parser-glue.hh:284:29: error: no member named 'clamp' in namespace 'std'
                return std::clamp(v, min_v, max_v);
                       ~~~~~^
./parser-glue.hh:278:30: error: no return statement in constexpr function
        inline constexpr int param(unsigned int idx,
                             ^
./parser-glue.hh:384:29: error: no member named 'clamp' in namespace 'std'
                return std::clamp(v, min_v, max_v);
                       ~~~~~^
./parser-glue.hh:378:30: error: no return statement in constexpr function
        inline constexpr int collect1(unsigned int idx,
                             ^
parser-cat.cc:530:22: error: case value evaluates to -1, which cannot be narrowed to type 'unsigned int' [-Wc++11-narrowing]
                case -1:
                     ^