Enum Op 

pub enum Op {
    Return,
    Call(usize),
    ConstFloat(f64),
    ConstBool(bool),
    Const(usize),
    LoadIndex,
    StoreIndex,
    Add,
    Sub,
    Mul,
    Div,
    Cmp,
    Not,
    Le,
    Ge,
    Print,
    StoreGlobal(String),
    LoadGlobal(String),
    StoreLocal(usize),
    LoadLocal(usize),
    Pop,
    Nil,
    Jump(i32),
    JumpIfFalse(i32),
    Array,
}

Operations supported by the virtual machine

Variants

Return

Print the top value of the stack.

Call(usize)

Call function stored in the top of the stack.

ConstFloat(f64)

Pushes floating-point constant on the stack.

ConstBool(bool)

Pushes boolean constant on the stack.

Const(usize)

Pushes constant from the constant pool on the stack.

LoadIndex

Loads indexed element from the array and pushes it on the stack.

StoreIndex

Add

Add two top elements of the stack.

Sub

Mul

Div

Cmp

Compares top values of the stack. Puts comparison result on top of the stack.

Not

Inverts boolean value on top of the stack.

Le

Pushes true on the stack if the first value is less or equal to the second.

Ge

Pushes true on the stack if the first value is greater or equal to the second.

Print

Prints value on top of the stack.

StoreGlobal(String)

Takes the value from the top of the stack and stores it in the global variable.

LoadGlobal(String)

Load global variable value onto the stack.

StoreLocal(usize)

Takes the value from the top of the stack and stores it in the local variable.

LoadLocal(usize)

Load local variable value onto the stack.

Pop

Pops value from the top of the stack.

Nil

Pushes nil on the stack.

Jump(i32)

Unconditional jump to the given offset.

JumpIfFalse(i32)

Jump to the given offset if the top value of the stack is false.

Array

Trait Implementations

impl Clone for Op

fn clone(&self) -> Op

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Op

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

Formats the value using the given formatter.

impl Display for Op

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

Formats the value using the given formatter.

impl PartialEq for Op

fn eq(&self, other: &Op) -> 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 Op