Enum FunctionEffect 

pub enum FunctionEffect {
    Pure,
    Write,
    Host,
}

VAPP-194 (E1): what calling a function does. Expressions are PURE: a binding, visible, a computed field or a query param never writes. A write changes records or the surface data, a host function reaches outside the surface (a toast, an MCP call, a link, another action); both run only as steps of a package action (crate::host::actions).

Variants

Pure

Write

Host

Implementations

impl FunctionEffect

pub fn as_str(self) -> &'static str

pure | write | host.

Trait Implementations

impl Clone for FunctionEffect

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for FunctionEffect

impl Debug for FunctionEffect

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

Formats the value using the given formatter.

impl Eq for FunctionEffect

impl PartialEq for FunctionEffect

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FunctionEffect