Struct UsageInfo 

pub struct UsageInfo {
    pub use_count: usize,
    pub is_escaping: bool,
    pub is_in_loop: bool,
}

Per-variable usage information collected by occurrence analysis.

Fields

use_count: usize

How many times the variable is referenced.

is_escaping: bool

Whether the variable escapes into a closure, constructor field, or any context where its lifetime is not locally bounded.

is_in_loop: bool

Whether any use of the variable occurs inside a syntactic loop (i.e., inside a recursive function body or after a back-edge).

Implementations

impl UsageInfo

pub fn is_dead(&self) -> bool

Returns true if the variable is dead (zero uses).

pub fn is_once(&self) -> bool

Returns true if the variable is used exactly once.

Trait Implementations

impl Clone for UsageInfo

fn clone(&self) -> UsageInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UsageInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for UsageInfo

fn default() -> UsageInfo

Returns the “default value” for a type.

impl Display for UsageInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.