Enum Expression

pub enum Expression<'a> {
    String(Cow<'a, str>),
    Number(u32),
    Boolean(bool),
    List(Vec<Expression<'a>>),
    BinaryOperation(Box<BinaryOperation<'a>>),
    Range(Box<Range<'a>>),
    Named(NamedExpression<'a>),
    Verdict(Verdict<'a>),
}

Expressions are the building blocks of (most) statements. In their most basic form, they are just immediate values represented as a JSON string, integer or boolean type.

Variants

String(Cow<'a, str>)

A string expression (immediate expression). For string expressions there are two special cases:

• @STRING: The remaining part is taken as set name to create a set reference.
• \*: Construct a wildcard expression.

Number(u32)

An integer expression (immediate expression).

Boolean(bool)

A boolean expression (immediate expression).

List(Vec<Expression<'a>>)

List expressions are constructed by plain arrays containing of an arbitrary number of expressions.

BinaryOperation(Box<BinaryOperation<'a>>)

A binary operation expression.

Range(Box<Range<'a>>)

Construct a range of values.

The first array item denotes the lower boundary, the second one the upper boundary.

Named(NamedExpression<'a>)

Wrapper for non-immediate expressions.

Verdict(Verdict<'a>)

A verdict expression (used in verdict maps).

Trait Implementations

impl<'a> Clone for Expression<'a>

fn clone(&self) -> Expression<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for Expression<'a>

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

Formats the value using the given formatter.

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

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'a> JsonSchema for Expression<'a>

fn schema_name() -> String

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn is_referenceable() -> bool

Whether JSON Schemas generated for this type should be re-used where possible using the $ref keyword.

impl<'a> PartialEq for Expression<'a>

fn eq(&self, other: &Expression<'a>) -> 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<'a> Serialize for Expression<'a>

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> Eq for Expression<'a>

impl<'a> StructuralPartialEq for Expression<'a>