Struct StaticEnvironment

pub struct StaticEnvironment { /* private fields */ }

Stack of local variables in nested scopes

Each scope represents a Ruby scope:

# 1
class A
  # 1, 2
  def m
    # 1, 2, 3
  end
  # 1, 2
end
# 1

In the example above comments show what’s in the stack. Basically, it’s pushed when you enter a new scope and it’s popped when exit it.

Implementations

impl StaticEnvironment

pub fn new() -> Self

Constructor

pub fn extend_static(&self)

Performs a push, doesn’t inherit previously declared variables in the new scope

Handles class/module scopes

pub fn extend_dynamic(&self)

Performs a push, inherits previously declared variables in the new scope

Handles block/lambda scopes

pub fn unextend(&self)

Performs pop

pub fn declare(&self, name: &str)

Declares a new variable in the current scope

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

Returns true if variable with a given name is declared in the current scope

Trait Implementations

impl Clone for StaticEnvironment

fn clone(&self) -> StaticEnvironment

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for StaticEnvironment

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

Formats the value using the given formatter.

impl Default for StaticEnvironment

fn default() -> StaticEnvironment

Returns the “default value” for a type.