Enum Expr 

pub enum Expr {
    Literal {
        value: Value,
    },
    Var {
        path: String,
    },
    Answer {
        path: String,
    },
    IsSet {
        path: String,
    },
    And {
        expressions: Vec<Expr>,
    },
    Or {
        expressions: Vec<Expr>,
    },
    Not {
        expression: Box<Expr>,
    },
    Eq {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Ne {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Lt {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Lte {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Gt {
        left: Box<Expr>,
        right: Box<Expr>,
    },
    Gte {
        left: Box<Expr>,
        right: Box<Expr>,
    },
}

Lightweight expression AST used for visible_if, computed fields, and validations.

Variants

Literal

Fields

value: Value

Var

Fields

path: String

Answer

Fields

path: String

IsSet

Fields

path: String

And

Fields

expressions: Vec<Expr>

Or

Fields

expressions: Vec<Expr>

Not

Fields

expression: Box<Expr>

Eq

Fields

left: Box<Expr>

right: Box<Expr>

Ne

Fields

left: Box<Expr>

right: Box<Expr>

Lt

Fields

left: Box<Expr>

right: Box<Expr>

Lte

Fields

left: Box<Expr>

right: Box<Expr>

Gt

Fields

left: Box<Expr>

right: Box<Expr>

Gte

Fields

left: Box<Expr>

right: Box<Expr>

Implementations

impl Expr

pub fn evaluate_value(&self, ctx: &Value) -> Option<Value>

Evaluates the expression and returns a JSON value when possible.

pub fn evaluate_bool(&self, ctx: &Value) -> Option<bool>

Evaluates the expression and coerces the result into a boolean when possible.

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Expr

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for Expr

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

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 inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for Expr

fn eq(&self, other: &Expr) -> 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 Serialize for Expr

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Expr