Function pio_diagnostic_span 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn pio_diagnostic_span(
    diagnostics: *const PioDiagnostics,
    index: usize,
    span_index: usize,
    output: *mut PioDiagnosticSpanView,
    error: *mut *mut PioError,
) -> bool

Read one source byte range. The source string borrows from diagnostics.

Safety

Pointers and handles must satisfy the crate-level safety requirements.