Struct MattenLimits 

pub struct MattenLimits {
    pub max_dimensions: usize,
    pub max_elements: usize,
    pub max_parse_bytes: usize,
}

Resource safety limits for shape calculations and allocations (RFC-018).

MattenLimits is the single source of truth for all allocation budgets in matten. The default values are generous for typical PoC workloads but prevent pathological resource exhaustion from malformed or adversarial inputs.

Examples

use matten::MattenLimits;

let limits = MattenLimits::default();
assert_eq!(limits.max_dimensions, 8);

Boundary-safe constructors (try_zeros, try_ones, try_full) use the default limits automatically. Pass a custom MattenLimits to Tensor::try_zeros_with_limits etc. if you need a different budget.

Fields

max_dimensions: usize

Maximum number of axes (rank). Default: 8.

max_elements: usize

Maximum number of elements any fill constructor or broadcast output may allocate. Default: 1 048 576 (~1 M, ~8 MiB for f64).

Note: a 2048×2048 matrix has ~4 M elements and exceeds this default. This is an intentionally conservative safety-first default for PoC use. Use try_zeros_with_limits with a custom MattenLimits for larger tensors, or use the panicking zeros/ones/full only when you know the shape is safe.

max_parse_bytes: usize

Maximum number of bytes a JSON or CSV parser may accept. Default: 128 MiB.

Note: this field is a future extension point. The current parsers (from_json, from_csv, etc.) do not yet enforce this limit at runtime. See RFC-018 implementation notes.

Implementations

impl MattenLimits

pub fn strict() -> Self

A very restrictive limit set useful for fuzz / threat-model tests.

Trait Implementations

impl Clone for MattenLimits

fn clone(&self) -> MattenLimits

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MattenLimits

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

Formats the value using the given formatter.

impl Default for MattenLimits

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for MattenLimits

fn eq(&self, other: &MattenLimits) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MattenLimits