[antlr-interest] Help with semantic actions commit

[swalton]

I derived my grammar from Terry's C grammar.  I have added a lot of
semantic actions and kept the typedef symbol definition.  I have run into a
problem and need help.  Consider the following:

typedef int uint32_t;
typedef uint32_t result_t;

I can have any number of these typedefs, but this case is sufficient to
illustrate the problem I am encountering.  The grammar looks ahead beyond
the first semicolon before committing the 'uint32_t' in the scope table. 
Needless to say, the second line always fails.  I watched step-by-step,
placing System.err.print()'s along the way to find out when the
'$Symbols::types.add(name);' is called.  The test (boolean
isTypeName(String name)) always occurs *before* 'uint32_t' is stored.  I
added a { addName(name) }? test (which always returns true) to see if I
could force an execution of the semantic action without success.

How do I get the symbol committed?  
How do I keep ANTLR from looking so far ahead?

Any help is appreciated.  This is a major roadblock.

-Sean Walton
PhD Student, SoC, U of U