Suppose there is an extensive C++ framework. This framework has multiple modules. I need to develop a tool that can scan all *.cpp, *.h, *.hpp files in the framework, isolate files relevant to one executable, and then remove all source code from those files that are not needed for compiling a specified executable.
For example, the framework has modules for querying relational databases, Document databases, Key-value stores, Column-oriented databases, and Graph databases.
I want to isolate only those files relevant to relational databases, and then I want to remove all those codes not used in relational databases.
Say the framework has a file format_string.hpp. This file contains 73 functions that can format strings in various ways. However, the relational database-related module uses only 15 functions from that file. So, I want to remove the rest of the 58 functions from that file.
Note: I often need to study C++ source codes and translate/convert that source code into other programming languages. This tool will help me understand the algorithms.
The deletion/purge is not permanent. It is only for learning purposes. This is about reducing the amount of source code for further manual inspection.
Question:
I have implemented the file-isolation part using C#.
However, I don't know how to implement the second part.
Do I need to use regex? Or do I need a lexer and a parser?
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