pub struct AstSize;
Expand description
A simple CostFunction
that counts total AST size.
let e: RecExpr<SymbolLang> = "(do_it foo bar baz)".parse().unwrap();
assert_eq!(AstSize.cost_rec(&e), 4);
Trait Implementations§
source§impl<L: Language> CostFunction<L> for AstSize
impl<L: Language> CostFunction<L> for AstSize
§type Cost = usize
type Cost = usize
The
Cost
type. It only requires PartialOrd
so you can use
floating point types, but failed comparisons (NaN
s) will
result in a panic.Auto Trait Implementations§
impl RefUnwindSafe for AstSize
impl Send for AstSize
impl Sync for AstSize
impl Unpin for AstSize
impl UnwindSafe for AstSize
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more