Plotting custom types and structs as values

[CrustyAuklet]

I have a type that looks something like this:

```c++
class CAttenEntry {
    float   m_atten = -1.0f;
public:
    CAttenEntry() : m_atten( -1 ) {}
    float    atten() const         { return m_atten >= 0 ? m_atten : 0.5f; }
    bool    calculated() const  { return m_atten >= 0; }
    operator double() const   {  return atten(); }
};

I added the operator double() function to try to get the value to plot in this extension, but I can't get it to work so far. The values are in a C-style array, but I have tried copying the values into a vector and that still doesn't work. As of now I am copying the atten() values to a vector every time the array changes and that "works", but is very slow.

Using C++ and Visual Studio 2019

[awulkiew]

Right. The vscode extension supports user-defined values but this one doesn't. This should be added here as well.

I don't know why it doesn't work with conversion operator. It's probably a bug. Even it it was working, the visualization would be slow because it'd be based on strings returned by the debugger instead of accessing the memory directly. So memory-access should still be added.

With that said. the development for VS2019 is discontinued so when implemented this will be available in VS2022.

[awulkiew]

It seems that the conversion operator doesn't work in debugger. I can't remember if it worked in older versions of VS or that I assumed it will. E.g. for this struct:

struct MyValue
{
    operator double() const { return v; }
    double v = 0;
};

I get the following in the standard Watch:

	Name	Value	Type
	double(my_value)	no suitable conversion function from "MyValue" to "double" exists

Is it the same for you?

It seems that no only user defined values should be supported explicitly but also documentation altered.