Function syntax::visit::walk_expr_opt[src]
pub fn walk_expr_opt<E: Clone, V: Visitor<E>>(visitor: &mut V, optional_expression: Option<Gc<Expr>>, env: E)
pub fn walk_expr_opt<E: Clone, V: Visitor<E>>(visitor: &mut V, optional_expression: Option<Gc<Expr>>, env: E)
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct (or str), enum,
trait, typedef (or
tdef).