Struct TokenEstimationMeta 

pub struct TokenEstimationMeta {
    pub bytes_per_token_est: f64,
    pub bytes_per_token_low: f64,
    pub bytes_per_token_high: f64,
    pub tokens_min: usize,
    pub tokens_est: usize,
    pub tokens_max: usize,
    pub source_bytes: usize,
}

Metadata about how token estimates were produced.

Rails are NOT guaranteed bounds — they are heuristic fences. Default divisors: est=4.0, low=3.0 (conservative → more tokens), high=5.0 (optimistic → fewer tokens).

Invariant: tokens_min <= tokens_est <= tokens_max.

Fields

bytes_per_token_est: f64

Divisor used for main estimate (default 4.0).

bytes_per_token_low: f64

Conservative divisor — more tokens (default 3.0).

bytes_per_token_high: f64

Optimistic divisor — fewer tokens (default 5.0).

tokens_min: usize

tokens = source_bytes / bytes_per_token_high (optimistic, fewest tokens).

tokens_est: usize

tokens = source_bytes / bytes_per_token_est.

tokens_max: usize

tokens = source_bytes / bytes_per_token_low (conservative, most tokens).

source_bytes: usize

Total source bytes used to compute estimates.

Implementations

impl TokenEstimationMeta

pub const DEFAULT_BPT_EST: f64 = 4.0

Default bytes-per-token divisors.

pub const DEFAULT_BPT_LOW: f64 = 3.0

pub const DEFAULT_BPT_HIGH: f64 = 5.0

pub fn from_bytes(bytes: usize, bpt: f64) -> Self

Create estimation from source byte count using default divisors.

pub fn from_bytes_with_bounds( bytes: usize, bpt_est: f64, bpt_low: f64, bpt_high: f64, ) -> Self

Create estimation from source byte count with explicit low/high divisors.

Trait Implementations

impl Clone for TokenEstimationMeta

fn clone(&self) -> TokenEstimationMeta

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TokenEstimationMeta

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TokenEstimationMeta

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for TokenEstimationMeta

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.