Enum Expr 

pub enum Expr {
    Nil,
    Bool(bool),
    Int(i64),
    Float(String),
    Str(String),
    Var(String),
    Unary(UnOp, Box<Expr>),
    Binary(BinOp, Box<Expr>, Box<Expr>),
    Index(Box<Expr>, Box<Expr>),
}

Variants

Nil

Bool(bool)

Int(i64)

Float(String)

Str(String)

Var(String)

Unary(UnOp, Box<Expr>)

Binary(BinOp, Box<Expr>, Box<Expr>)

Index(Box<Expr>, Box<Expr>)

Implementations

impl Expr

pub fn var(name: impl Into<String>) -> Self

pub fn stack_var(idx: usize) -> Self

pub fn global_var() -> Self

pub fn global_table_var() -> Self

pub fn local_table_var() -> Self

pub fn index(base: Expr, idx: Expr) -> Self

pub fn unary(op: UnOp, a: Expr) -> Self

pub fn binary(op: BinOp, a: Expr, b: Expr) -> Self

fn precedence(&self) -> u8

fn mark_stack_var(name: &str, used_s: &mut BTreeSet<usize>)

pub fn render(&self, used_s: &mut BTreeSet<usize>, parent_prec: u8) -> String

pub fn const_eq_zero(&self) -> Option<bool>

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 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 Eq for Expr

impl StructuralPartialEq for Expr