正则表达式不必是完美的，只要它能捕获大多数情况。  /.* class\s +（[^ {] +）\s * [：]？（[^ {] +）{/ 
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这应该适用于大多数类定义，包括模板类。类名称捕获在$ 1中，如果它是派生类，则基数将为$ 2。
 
I need a regular expression for finding class declarations so I can add a #define before the "class" keyword.  The regular expression doesn't have to be perfect, just good enough that it catches most of the cases.
/.*class\s+([^{]+)\s*[:]?([^{]+){/
This should work for most class definitions, including template classes. The class name is captured in $1 and if it is a derived class, the base will be in $2.