semantic-expand-nonterminal

semantic-expand-nonterminal is a variable defined in `semantic.el'.
Its value is

nil

• Automatically becomes buffer-local when set.
• This variable is an alias for `semantic-tag-expand-function'.
• This variable is obsolete since 23.2;
  use `semantic-tag-expand-function' instead.
• This variable may be risky if used as a file-local variable.

Documentation:
Function to call for each nonterminal production.
Return a list of non-terminals derived from the first argument, or nil
if it does not need to be expanded.
Languages with compound definitions should use this function to expand
from one compound symbol into several. For example, in C the definition
int a, b;
is easily parsed into one tag. This function should take this
compound tag and turn it into two tags, one for A, and the other for B.