查找一个c ++项目中有多少个goto

Question

I am trying to see how many goto instructions are inside a c++ project. Now I am using a simple matching with grep searching for "goto " :

grep -r --exclude-dir "third_party" --include "*.cpp" --include "*.h" --include "*.C" --include "*.cxx" --include "*.hcc" --include "*.c" --include "*.cc" "goto " .

I get a lot of fake positive, in particular inside comments:

// Perform stack overflow check if this goto needs it before jumping.

or inside literals:

stream->Add(" goto (");

what is the easiest way to avoid them? I don't need a perfect solution.

Answer 1

You might consider using a static analysis tool like eg cppcheck for doing this. Handling all the possible situations only using regex might turn out not to be applicable.

Answer 2

Change your regular expression to: 'goto[ \\t]+[_A-Za-z0-9]+[ \\t]*;' This will search for the word goto, its target label and a semicolon all on the same line.

Answer 3

I suggest using awk or another tool that can use more than one regular expression or write a script.

The more difficult cases are:

/*****
 * Goto system failure if this point is reached.
 */

Meaning anything inside C-style comments.