Function compile_polydat_checked 

pub fn compile_polydat_checked(
    source: &str,
) -> (Result<Box<dyn Kernel>, ()>, DiagnosticReport)

Compile with full diagnostics: errors, warnings, suggestions, on the default engine.

Returns (Ok(kernel), report) on success with possible warnings, or (Err(()), report) on failure with errors. The report always contains all diagnostics. The program the report describes is the program the kernel runs: the same compile every entry point makes.