cccc fails on regular c++ code

[pps83]

sample file:

#include "coders.h"
#include "format.h"
#include "magic_enum.hpp"


namespace coders
{

IntegerCodec getByName(const char* name)
{
    return getByName(std::string_view(name));
}

IntegerCodec getByName(std::string_view name)
{
    auto x = magic_enum::enum_cast<CoderType>(name);
    if (x.has_value())
        return getByType(x.value());
    throw_runtime_error("unknown name:\"%*s\"", (int)name.size(), name.data());
}

std::vector<IntegerCodec> allCodecs()
{
    const auto& values = magic_enum::enum_values<CoderType>();
    std::vector<IntegerCodec> codecs;
    codecs.reserve(values.size());
    for (size_t i = 0; i < values.size(); ++i)
    {
        if (values[i] != CoderType::Null)
            codecs.emplace_back(getByType(values[i]));
    }
    return codecs;
}

} // namespace coders

cccc errors out:

Processing coders-allCodecs.cpp as C/C++ (c++.ansi)
coders-allCodecs.cpp(36): syntax error at token <EOF>
coders-allCodecs.cpp(6): trying to match namespace_block at 'namespace'

Also fails on 15+ year old c++ code. For example, override makes it fail:

template <uint32_t BlockSizeInUnitsOfPackSize = 8>
class FastPFor32 : public IntegerCODEC
{
public:
    void encodeArray(const uint32_t* in, const size_t length, uint32_t* out, size_t& nvalue) override
    {
        pfor32.encodeArray(in, length, out, nvalue);
    }
...

Processing coders.cpp as C/C++ (c++.ansi)
coders.cpp(124): syntax error at token void
coders.cpp(124): trying to match class_block_item_list at 'void'

seems alto to fail on things like std::vector, constexpr etc