Enum Expression

pub enum Expression {
    Atom {
        name: String,
        parameters: Vec<Parameter>,
    },
    And(Vec<Expression>),
    Not(Box<Expression>),
    Assign(Box<Expression>, Box<Expression>),
    Increase(Box<Expression>, Box<Expression>),
    Decrease(Box<Expression>, Box<Expression>),
    ScaleUp(Box<Expression>, Box<Expression>),
    ScaleDown(Box<Expression>, Box<Expression>),
    BinaryOp(BinaryOp, Box<Expression>, Box<Expression>),
    Number(i64),
    Forall(Vec<TypedParameter>, Box<Expression>),
    Duration(DurationInstant, Box<Expression>),
}

An enumeration of expressions that can be used in PDDL planning domains and problems.

Variants

Atom

An atomic expression consisting of a name and an optional list of parameters.

Fields

name: String

The name of the atom.

parameters: Vec<Parameter>

The parameters of the atom.

And(Vec<Expression>)

A logical “and” expression that takes a list of sub-expressions as arguments.

Not(Box<Expression>)

A logical “not” expression that takes a single sub-expression as an argument.

Assign(Box<Expression>, Box<Expression>)

An assignment expression that assigns the value of the second sub-expression to the first sub-expression.

Increase(Box<Expression>, Box<Expression>)

An increase expression that increases the value of the first sub-expression by the value of the second sub-expression.

Decrease(Box<Expression>, Box<Expression>)

A decrease expression that decreases the value of the first sub-expression by the value of the second sub-expression.

ScaleUp(Box<Expression>, Box<Expression>)

A scale-up expression that multiplies the value of the first sub-expression by the value of the second sub-expression.

ScaleDown(Box<Expression>, Box<Expression>)

A scale-down expression that divides the value of the first sub-expression by the value of the second sub-expression.

BinaryOp(BinaryOp, Box<Expression>, Box<Expression>)

A binary operation expression that applies a binary operation to two sub-expressions.

Number(i64)

A numeric constant expression.

Forall(Vec<TypedParameter>, Box<Expression>)

A forall expression that takes a list of typed parameters and a sub-expression as arguments.

Duration(DurationInstant, Box<Expression>)

A duration expression that takes a duration instant and a sub-expression as arguments. The duration instant can be one of at start, at end, or over all.

Implementations

impl Expression

pub fn parse_expression( input: TokenStream<'_>, ) -> IResult<TokenStream<'_>, Expression, ParserError>

Parse an expression from a token stream.

pub fn to_pddl(&self) -> String

Convert the expression to PDDL.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expression

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expression

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Expression

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

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 Expression

fn cmp(&self, other: &Expression) -> 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.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> 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 PartialOrd for Expression

fn partial_cmp(&self, other: &Expression) -> 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 Expression

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for Expression

impl StructuralPartialEq for Expression