Function collect_compact_vars

src/diagnostics/undefined_variables.rs:994–1000

Collect variable names referenced by `compact('var1', 'var2', …)` calls. These variables are used by string name and should be considered defined.

(statements: &[Statement<'_>])

/// calls.  These variables are used by string name and should be
/// considered defined.
pub(crate) fn collect_compact_vars(statements: &[Statement<'_>]) -> HashSet<String> {
    let mut vars = HashSet::new();
    for stmt in statements {
        collect_compact_from_stmt(stmt, &mut vars);
    }
    vars
}

fn collect_compact_from_stmt(stmt: &Statement<'_>, vars: &mut HashSet<String>) {
    match stmt {