Struct Vm 

pub struct Vm {
    pub chunks: Vec<Chunk>,
    pub sym_table: SymbolTable,
    pub variables: HashMap<usize, Value>,
    /* private fields */
}

A virtual machine that executes bytecode instructions generated by the compiler (see Compiler).

Fields

chunks: Vec<Chunk>

The bytecode chunks to execute.

sym_table: SymbolTable

A symbol table that maps identifiers to information about the values they represent.

This is used to store information about variables and functions that are defined in the program.

variables: HashMap<usize, Value>

Variables in the global scope.

Implementations

impl Vm

pub fn new() -> Self

Creates a blank Vm with no chunks. This is used for cas-repl to compile code on the fly.

pub fn compile<T: Compile>(expr: T) -> Result<Self, Error>

Creates a Vm by compiling the given source AST.

pub fn compile_program(stmts: Vec<Stmt>) -> Result<Self, Error>

Creates a Vm by compiling multiple statements.

pub fn with_trig_mode(self, mode: TrigMode) -> Self

Sets the trigonometric mode used when calling native functions.

pub fn run(&mut self) -> Result<Value, Error>

Executes the bytecode instructions.

Trait Implementations

impl Clone for Vm

fn clone(&self) -> Vm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Vm

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

Formats the value using the given formatter.

impl Default for Vm

fn default() -> Self

Returns the “default value” for a type.

impl From<Compiler> for Vm

fn from(compiler: Compiler) -> Self

Converts to this type from the input type.