Struct Environment 

pub struct Environment {
    pub builtin_dtables: BuiltinDispatchTables,
    /* private fields */
}

An environment containing information about declared globals, functions, vtables.

Fields

builtin_dtables: BuiltinDispatchTables

Dispatch tables for builtin types.

Implementations

impl Environment

pub fn new(builtin_dtables: BuiltinDispatchTables) -> Self

Creates a new, empty environment.

pub fn create_global(&mut self, name: &str) -> Result<Opr24, ErrorKind>

Tries to create a global. Returns the global slot number, or an error if there are too many globals.

pub fn get_global(&self, name: &str) -> Option<Opr24>

Tries to look up a global. Returns None if the global doesn’t exist.

pub fn create_function( &mut self, function: Function, ) -> Result<Opr24, ErrorKind>

Creates a function and returns its ID.

pub fn get_method_index( &mut self, signature: &FunctionSignature, ) -> Result<u16, ErrorKind>

Tries to look up the index of a method, based on a function signature. Returns None if there are too many function signatures in this environment.

pub fn get_method_signature( &self, method_index: u16, ) -> Option<&FunctionSignature>

Returns the signature for the method with the given ID, or None if the method index is invalid.

pub fn create_trait(&mut self, name: Rc<str>) -> Result<Opr24, ErrorKind>

Creates a trait and returns its ID. Use get_trait_mut afterwards to modify the trait.

pub fn get_trait(&self, id: Opr24) -> Option<&TraitPrototype>

Returns a reference to the trait with the given ID.

pub fn get_trait_mut(&mut self, id: Opr24) -> Option<&mut TraitPrototype>

Returns a mutable reference to the trait with the given ID.

Trait Implementations

impl Debug for Environment

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

Formats the value using the given formatter.