Allow usage of a typedef type in parameters of a parser for p4c-bm2-ss

[VolodymyrPeschanenkoIntel]

If we try to get a type of a header from refMap for Type_Name then It could be represented as Type_Typedef type which contains type of a header in one of it's filed.
Please, run the following command to demonstrate the problem:
./p4c-bm2-ss -o ./tmp/strength-simple.p4.json ../testdata/p4_16_samples/strength-simple.p4

[mihaibudiu]

Don't we have a pass to eliminate all typedefs from the program?

[VolodymyrPeschanenkoIntel]

Don't we have a pass to eliminate all typedefs from the program?

In that case behavioral-model crashed for few examples.
For example:
1550/2217 Test #449: bmv2/testdata/p4_16_samples/ipv6-switch-ml-bmv2.p4 .............................................***Failed 0.85 sec
Error compiling
/p4c/testdata/p4_16_samples/ml-headers.p4(182): [--Werror=type-error] error: Field _egress_port1 is not a member of structure struct metadata_t
struct metadata_t {
^^^^^^^^^^
/p4c/testdata/p4_16_samples/ml-headers.p4(182): [--Werror=type-error] error: Field _fwd_out_bd69 is not a member of structure struct metadata_t
struct metadata_t {
^^^^^^^^^^
/p4c/testdata/p4_16_samples/ml-headers.p4(182): [--Werror=type-error] error: Field _fwd_out_bd69 is not a member of structure struct metadata_t
struct metadata_t {
^^^^^^^^^^

*** Test failed

But everything is correct in p4c side.

[mihaibudiu]

why is this test failing?

[VolodymyrPeschanenkoIntel]

I think that, It happens because of these two things:

1. typedef my_headers_t headers_t;
2. parser parser_impl(...,out headers_t hdr,...)

[mihaibudiu]

Doesn't #3123 solve this problem?
If so, please approve that PR and close this one.

[VolodymyrPeschanenkoLitSoft]

Implemented in #3123