Function syntax::visit::walk_expr_optUnstable
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[src]
pub fn walk_expr_opt<'v, V: Visitor<'v>>(visitor: &mut V, optional_expression: &'v Option<P<Expr>>)
pub fn walk_expr_opt<'v, V: Visitor<'v>>(visitor: &mut V, optional_expression: &'v Option<P<Expr>>)
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, enum,
trait, typedef (or
tdef).