Enum Operator 

pub enum Operator {
    ArithmeticOperator,
    RelationalOperator,
    LogicalOperator,
    NegateCondition,
    UnaryOperator,
    UpdateOperator,
    RemovedCall,
    ReturnValue,
    BooleanLiteral,
    StringLiteral,
    OptionalChaining,
    RegexLiteral,
    RemovedChainLink,
}

One mutation operator.

The set comes from selective-mutation research: it keeps the operators that give most of the test-strength signal and drops redundant ones.

Variants

ArithmeticOperator

+ and - swap, * and / swap, % becomes *, += and -= swap.

RelationalOperator

The non-redundant relational subset (Kaminski).

LogicalOperator

&& and || swap, ?? becomes &&.

NegateCondition

A plain condition becomes true and false.

UnaryOperator

!x and -x become x.

UpdateOperator

++ and -- swap.

RemovedCall

A call statement becomes a no-op.

ReturnValue

return expr becomes return undefined.

BooleanLiteral

true and false swap.

StringLiteral

A non-empty string becomes empty, an empty string becomes "fallow".

OptionalChaining

a?.b becomes a.b, a?.() becomes a().

RegexLiteral

One token of a regular expression literal changes: an anchor is removed, a character class is negated, or a class escape gets the opposite case.

RemovedChainLink

One call link of a fluent chain in a module-level const initializer is removed: r.m(args) becomes r, when r is a call.

Implementations

impl Operator

pub const ALL: [Operator; 13]

Every operator, in a stable order.

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

The stable kebab-case name of the operator.

pub fn from_name(name: &str) -> Option<Operator>

Parses a kebab-case operator name.

Trait Implementations

impl Clone for Operator

fn clone(&self) -> Operator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Operator

impl Debug for Operator

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

Formats the value using the given formatter.

impl Display for Operator

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

Formats the value using the given formatter.

impl Eq for Operator

impl Hash for Operator

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Operator

fn cmp(&self, other: &Operator) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Operator

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Operator

fn partial_cmp(&self, other: &Operator) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Operator

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Operator