Enum Expression 

pub enum Expression {
    LiteralExpression {
        value: Literal,
    },
    ParenExpression {
        expression: Box<Expression>,
    },
    VariableReferenceExpression {
        name: String,
    },
    FunctionCallExpression {
        name: String,
        args: Vec<Expression>,
    },
    BinaryExpression {
        op: String,
        l_expression: Box<Expression>,
        r_expression: Box<Expression>,
    },
    UnaryExpression {
        op: String,
        expression: Box<Expression>,
    },
}

A yot expression.

Variants

LiteralExpression

A literal value.

Grammar

• IntegerLiteral
• StrLiteral

Fields

value: Literal

ParenExpression

An expression enclosed in parentheses.

Grammar

• “(” + Expression + “)”

Fields

expression: Box<Expression>

VariableReferenceExpression

A reference to a variable.

Grammar

• Identifier

Fields

name: String

FunctionCallExpression

A call to a function with arguments.

Grammar

• Identifier + “(” + (Expression + “,”)… + “)”

Fields

name: String

args: Vec<Expression>

BinaryExpression

A link between two expresesions with a binary operator.

Possible operators: “=”, “+”, “-”, “*”, “/”, “==”, “!=”, “<”, “>”, “<=”, “>=”

Grammar

• Expression + op + Expression

Fields

op: String

l_expression: Box<Expression>

r_expression: Box<Expression>

UnaryExpression

A prefix operator to an expression.

Possible operators: “-”

Grammar

• op + Expression

Fields

op: String

expression: Box<Expression>

Trait Implementations

impl Debug for Expression

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

Formats the value using the given formatter.