Regex to parse function names?

This isn't exactly C++ related, with the exception of I'm dealing with C++ function names. I'm trying to write a regex that can parse the function names of C++ functions but I only want standalone function names. So the text is also pretty much identicle to a var name except it will end with a (. I can come kind of close and this is what I have so far

Code:

---

(?![a-z])[^\:,>,\.]([a-z,A-Z]+[_][a-z,A-Z]+)+[(]

---

To give a better idea of what I'm trying to match, this should match

asdfas_asdfasd_asdfasf(
[asdfas_asdfasd_asdfasf(
(asdfas_asdfasd_asdfasf(

This shouldn't match

asf_as_df::asdfas_asdfasd_asdfasf(
asf_as_df.asdfas_asdfasd_asdfasf(
asf_as_df->asdfas_asdfasd_asdfasf(

Are there any regex gurus out there that can help me out with this?

I don't think it is that simple.

Code:

---

struct A
{
  A(int);
};

A a(10); //this is not a function

A b(int(0)); //this is not a function

int n;

A c(int(n)); //this is a function

A d((int(n))); //this is not a function

A e(n); //this is not a function

etc

---

The language is context sensitive. In order to tell whether a pattern is or isn't a function name, you actually have to know if the tokens involved in the expressions are typenames or not.

Apart from not being able to tell whether it is a function declaration (call) or an instance declaration, you'll probably also not be able to spot cases where operator() is involved and probably some other cases.

Well that quickly pointed out some outliers I missed. I now have

Code:

---

(?![a-z])[^\:,>,\.]([a-z,A-Z]+[_]*[a-z,A-Z]*)+[(]

---

While what I have listed as being matches may not guarentee it to be a function, it is a high probability that it is. I'll be pruning the results manually after. I'm just trying to get a good candidate list.