JavaCC How to access non-terminal's TOKEN child

Problem Statement:

Sometime when we have this non-terminal:

P() :{}
{
   A() <B> C()
}

The generated P() node will have 2 children, i.e, A() and C(); and they can be access using P.jjtGetChild(0) and P.jjtGetChild(1); but we cannot access token <B> conveniently, except using A.jjtGetLastToken().next.

There are 2 options to fix this issue.

Option 1:

Add a wrapper with <B>, for example:

P() :{}
{
   A() B() C()
}

B() :{}
{
   <B>
}

So in the definition of P(), token <B> is replaced with a non-terminal B().

Option 2: Using JJTree decoration

P() :{}
{
   A() <B> #B C()
}

So a node B() will be generated by JJTree and added into P(); in this case P() will have 3 children, A(), B(), and C().

JJTree decoration only affect the expansion immediately left of it.

So

P() :{}
{
   A() <AB> <B> #B C()
}

Node B() will contain only a token <B>;

and

P() :{}
{
   A() ( <AB> <B> ) #B C()
}

Node B() will contain both <AB> and <B>;