Enum BuiltinEffect 

pub enum BuiltinEffect {
    Pure,
    Fallible,
    Nondeterministic,
    Effectful,
}

What calling a builtin can do beyond computing its result — the fact the effect analysis (optimize::effects) needs to reason about a call it cannot look inside.

Variants

Pure

A total function of its arguments: it always returns, the same answer for the same input.

Fallible

Deterministic, but it can stop the program (bad input, a failed lookup, Fail with).

Nondeterministic

Its answer is not a function of its arguments (a random draw).

Effectful

It touches the world: files, the page, storage, the network, shared host state.

Trait Implementations

impl Clone for BuiltinEffect

fn clone(&self) -> BuiltinEffect

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BuiltinEffect

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

Formats the value using the given formatter.

impl PartialEq for BuiltinEffect

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BuiltinEffect

impl Eq for BuiltinEffect

impl StructuralPartialEq for BuiltinEffect