成员初始化列表初始化的Vector与构造参数不符，异常未触发求助

Hey DaveyT, let's dig into this problem together. Since I don't have your actual Table.hh and Table.cc code yet, I'll start with common pitfalls that cause this kind of behavior, plus key details you should share to get a precise fix.

First, Common Culprits to Check #

1. Missing or Misplaced Exception Logic #

• Did you add explicit throw statements where invalid conditions should trigger an error? For example, if you need to throw when the two Vectors have mismatched sizes, double-check that this validation is happening before or during the member initialization (since initializer lists run before the constructor body). If your check is only in the constructor body, you might be too late to catch issues that occurred while initializing the Vectors.
• Also, make sure you're throwing a proper exception type (like std::invalid_argument or a custom exception class) instead of silently ignoring invalid states.

2. Accidental Vector Size Initialization #

• If your Vectors are showing a size of 4 unexpectedly, double-check your member initializer list. Maybe you're accidentally passing 4 as a size parameter to the Vector constructor? For example:

  Table::Table() : vec1(4), vec2(4) {} // This would create size-4 Vectors
  

• Or your Vector class might have a default constructor that automatically creates a size-4 Vector—verify the Vector class's constructor definitions to rule this out.

3. Missing Exception Handling in Tests #

• Are you wrapping your Table instance creation in a try/catch block? If not, the exception might be crashing your program silently (depending on your environment) instead of being reported. Your test code should look something like this:

  try {
      Table my_table(/* your constructor arguments here */);
  } catch (const std::exception& e) {
      std::cerr << "Caught exception: " << e.what() << std::endl;
  }
  

What to Share for a Precise Fix #

To narrow this down quickly, please share:

• The full class definition from Table.hh (including member variables and constructor declarations)
• The constructor implementation in Table.cc (especially the member initializer list)
• Your test code where you're creating the Table instance and expecting an exception
• The key parts of your Vector class (at least the constructors you're using to initialize the Table's members)

Once we have that code, we can pinpoint exactly where the issue is!

内容的提问来源于stack exchange，提问作者DaveyT