Function resolve_variable_subject

src/diagnostics/deprecated.rs:406–423

Resolve a subject expression to a `ClassInfo` using the full resolver pipeline ([`resolve_subject_outcome`]). This handles both simple `$variable` subjects and complex expressions like `$payment->getOrder()` or `$this->faker`. The resolver uses the diagnostic scope cache (when active) for variable lookups, avoiding backward-scanner fallthroughs.

(
    subject_text: &str,
    is_static: bool,
    rctx: &ResolutionCtx<'_>,
)

/// the diagnostic scope cache (when active) for variable lookups,
/// avoiding backward-scanner fallthroughs.
fn resolve_variable_subject(
    subject_text: &str,
    is_static: bool,
    rctx: &ResolutionCtx<'_>,
) -> Option<ClassInfo> {
    let access_kind = if is_static {
        AccessKind::DoubleColon
    } else {
        AccessKind::Arrow
    };

    match resolve_subject_outcome(subject_text.trim(), access_kind, rctx) {
        SubjectOutcome::Resolved(classes) => {
            classes.into_iter().next().map(|arc| ClassInfo::clone(&arc))
        }
        _ => None,
    }
}