[cppvsdbg] How to write a custom expression parser to support Rust?

[selvavm]

I am using C/C++ Extension with msvc debugger for Rust. There is a good support to visualize variables from Rust and I can extend it with my custom natvis.

However, when I want to do conditional breakpoint, it is not working as expected. For example consider a struct like below,

struct test {
    my_str: String,
    my_f32: f32,
    my_vec: Vec<String>,
}

I would like to set conditional breakpoint with similar to below conditions
my_test.my_str == "Test"
my_test.my_f32 == 3.1
my_test.my_vec[0] == "Test"

Can you tell me how I can achieve this?