c++ - Easy way find uninitialized member variables -

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i looking easy way find uninitialized class member variables.

finding them in either runtime or compile time ok.

currently have breakpoint in class constructor , examine member variables 1 one.

if use gcc can use -weffc++ flag, generates warnings when variable isn't initialized in member initialisation list. this:

class foo {   int v;   foo() {} };

leads to:

$ g++ -c -weffc++ foo.cpp -o foo.o foo.cpp: in constructor ‘foo::foo()’: foo.cpp:4: warning: ‘foo::v’ should initialized in member initialization list

one downside -weffc++ warn when variable has proper default constructor , initialisation wouldn't necessary. warn when initialize variable in constructor, not in member initialisation list. , warns on many other c++ style issues, such missing copy-constructors, might need clean code bit when want use -weffc++ on regular basis.

there bug causes give warning when using anonymous unions, can't work around other switching off warning, can done with:

#pragma gcc diagnostic ignored "-weffc++"

overall have found -weffc++ incredible useful in catching lots of common c++ mistakes.


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