Enum Expression 

pub enum Expression {
    Variable(String),
    Literal(String),
    Binary(Box<Expression>, Operator, Box<Expression>),
    Equal(Box<Expression>, Box<Expression>),
    Greater(Box<Expression>, Box<Expression>),
    Less(Box<Expression>, Box<Expression>),
    GreaterEqual(Box<Expression>, Box<Expression>),
    LessEqual(Box<Expression>, Box<Expression>),
    NotEqual(Box<Expression>, Box<Expression>),
}

Expression contains all the possible type of symbols that can be parsed.

Variants

Variable(String)

Literal(String)

Binary(Box<Expression>, Operator, Box<Expression>)

Equal(Box<Expression>, Box<Expression>)

Greater(Box<Expression>, Box<Expression>)

Less(Box<Expression>, Box<Expression>)

GreaterEqual(Box<Expression>, Box<Expression>)

LessEqual(Box<Expression>, Box<Expression>)

NotEqual(Box<Expression>, Box<Expression>)

Trait Implementations

impl Debug for Expression

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

Formats the value using the given formatter.

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 StructuralPartialEq for Expression