xfuncname problems with C++

From: Robert Dailey <rcdailey.lists@gmail.com>
Date: Jan 2, 2015, 16:49 UTC
Message-ID: <CAHd499Cn8C51i_+Dm4h_U4X_Jc-nhNMjoufiZRdn5LGxFqD_HA@mail.gmail.com>

I have a function like so:

void MyClass::SomeFunction(int someParameter)
{
    // Stuff changed in here
}

When I do `git diff` on the file containing this function, I get a chunk showing some changed code in this function somewhere in the middle of the body. However, the chunk header shows my root namespace name in the file instead of the function header:

@@ -144,15 +149,22 @@ namespace Utils

What I expect to see:

@@ -144,15 +149,22 @@ void MyClass::SomeFunction(int someParameter)

I've tried various regular expressions that work in regex testers I
use against this function signature, however they do not work when I
apply them to my config:

[diff "cpp"]
    xfuncname =
"^\\s*[\\w_][\\w\\d_]*\\s*.*\\s*[\\w_][\\w\\d_]*\\s*\\(.*\\)\\s*$"

File name is "foo.cpp", I even added it to my git attributes file:

*.cpp diff=cpp

Using the regex above, my chunk headers come back blank. Why is it
showing namespace? How do I make this match the nearest function
header?