Struct FunctionFacts 

pub struct FunctionFacts {
    pub direct_writes: bool,
    pub calls: BTreeSet<String>,
    pub opaque_effects: bool,
}

What one expression tree contributes to a mutability answer, before any callee bodies are consulted.

Fields

direct_writes: bool

A data-modifying statement appears somewhere in the tree itself: the same construct set Expr::contains_mutation rejects, at the same full depth (subqueries, blocks, idiom parts, closure bodies and call arguments included).

calls: BTreeSet<String>

Names of the user-defined functions the tree calls, without the fn:: prefix, at any depth.

opaque_effects: bool

The tree invokes something whose body cannot be inspected: a script, module or silo function, a statement-evaluating builtin (the set Function::read_only rejects), or a call operator whose target is not a closure literal.

Trait Implementations

impl Clone for FunctionFacts

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionFacts

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

Formats the value using the given formatter.

impl Default for FunctionFacts

fn default() -> Self

Returns the “default value” for a type.

impl Eq for FunctionFacts

impl PartialEq for FunctionFacts

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for FunctionFacts