internalAstError on typedefed default arguments

[pfultz2]

The code compiles with clang and gcc:

typedef int *a;
void b(a = a());

But fails on cppcheck with a syntax error:

Syntax Error: AST broken, binary operator '=' doesn't have two operands. [internalAstError]
void b(a = a());
         ^

[Daniel Marjamäki]

what does it do.. does it declare a nameless parameter that is initialized with a value? is it logically equivalent with void b(a)?

can we just remove the redundant initialization in the tokenizer?

[pfultz2]

does it declare a nameless parameter that is initialized with a value?

Yes, its initialized to the default constructed value(ie a() or nullptr).

is it logically equivalent with void b(a)?

Not really. You can't call it without any arguments(ie b()).

can we just remove the redundant initialization in the tokenizer?

That might affect function matching. Maybe you could replace it with {}?

[chrchr]

Related: #11232

[Daniel Marjamäki]

Fixed by 5e0fc24bb7f078c2f5446a228d5dbe455223a107

The a() is simplified to (int *)0