Struct boa::environment::declarative_environment_record::DeclarativeEnvironmentRecord

pub struct DeclarativeEnvironmentRecord {
    pub env_rec: HashMap<String, DeclarativeEnvironmentRecordBinding>,
    pub outer_env: Option<Environment>,
}

A declarative Environment Record binds the set of identifiers defined by the declarations contained within its scope.

Fields

env_rec: HashMap<String, DeclarativeEnvironmentRecordBinding>

outer_env: Option<Environment>

Trait Implementations

impl Clone for DeclarativeEnvironmentRecord

fn clone(&self) -> DeclarativeEnvironmentRecord

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeclarativeEnvironmentRecord

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

Formats the value using the given formatter.

impl Drop for DeclarativeEnvironmentRecord

fn drop(&mut self)

Executes the destructor for this type.

impl EnvironmentRecordTrait for DeclarativeEnvironmentRecord

fn has_binding(&self, name: &str) -> bool

Determine if an Environment Record has a binding for the String value N. Return true if it does and false if it does not.

fn create_mutable_binding(&mut self, name: String, deletion: bool)

Create a new but uninitialized mutable binding in an Environment Record. The String value N is the text of the bound name. If the Boolean argument deletion is true the binding may be subsequently deleted.

fn create_immutable_binding(&mut self, name: String, strict: bool) -> bool

Create a new but uninitialized immutable binding in an Environment Record. The String value N is the text of the bound name. If strict is true then attempts to set it after it has been initialized will always throw an exception, regardless of the strict mode setting of operations that reference that binding.

fn initialize_binding(&mut self, name: &str, value: Value)

Set the value of an already existing but uninitialized binding in an Environment Record. The String value N is the text of the bound name. V is the value for the binding and is a value of any ECMAScript language type.

fn set_mutable_binding(&mut self, name: &str, value: Value, strict: bool)

Set the value of an already existing mutable binding in an Environment Record. The String value name is the text of the bound name. value is the value for the binding and may be a value of any ECMAScript language type. S is a Boolean flag. If strict is true and the binding cannot be set throw a TypeError exception.

fn get_binding_value(&self, name: &str, _strict: bool) -> Value

Returns the value of an already existing binding from an Environment Record. The String value N is the text of the bound name. S is used to identify references originating in strict mode code or that otherwise require strict mode reference semantics.

fn delete_binding(&mut self, name: &str) -> bool

Delete a binding from an Environment Record. The String value name is the text of the bound name. If a binding for name exists, remove the binding and return true. If the binding exists but cannot be removed return false. If the binding does not exist return true.

fn has_this_binding(&self) -> bool

Determine if an Environment Record establishes a this binding. Return true if it does and false if it does not.

fn has_super_binding(&self) -> bool

Determine if an Environment Record establishes a super method binding. Return true if it does and false if it does not.

fn with_base_object(&self) -> Value

If this Environment Record is associated with a with statement, return the with object. Otherwise, return undefined.

fn get_outer_environment(&self) -> Option<Environment>

Get the next environment up

fn set_outer_environment(&mut self, env: Environment)

Set the next environment up

fn get_environment_type(&self) -> EnvironmentType

Get the type of environment this is

fn get_global_object(&self) -> Option<Value>

Fetch global variable

impl Finalize for DeclarativeEnvironmentRecord

fn finalize(&self)

impl Trace for DeclarativeEnvironmentRecord

unsafe fn trace(&self)

Marks all contained Gcs.

unsafe fn root(&self)

Increments the root-count of all contained Gcs.

unsafe fn unroot(&self)

Decrements the root-count of all contained Gcs.

fn finalize_glue(&self)

Runs Finalize::finalize() on this object and all contained subobjects