Class: Expressive::Scope

Inherits:
Object
  • Object
show all
Defined in:
lib/scope.rb

Direct Known Subclasses

TopLevel

Instance Method Summary collapse

Constructor Details

#initialize(parent = {}) ⇒ Scope

Returns a new instance of Scope.



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# File 'lib/scope.rb', line 3

def initialize(parent = {})
  @parent = parent
  @symbols = {}
end

Instance Method Details

#[](name) ⇒ Object 



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# File 'lib/scope.rb', line 8

def [](name)
  @symbols[name] || @parent[name]
end

#[]=(name, value) ⇒ Object 



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# File 'lib/scope.rb', line 12

def []=(name, value)
  @symbols[name] = value
end

#define(name, &block) ⇒ Object 



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# File 'lib/scope.rb', line 29

def define(name, &block)
  self[name] =  Function.new(&block)
end

#merge(scope) ⇒ Object 



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# File 'lib/scope.rb', line 16

def merge(scope)
  @symbols.merge!(scope)
end

#override_scope(scope) ⇒ Object 



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# File 'lib/scope.rb', line 20

def override_scope(scope)
  scope.merge!(@symbols)
  @symbols = scope
end

#retrieve_scope ⇒ Object 



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# File 'lib/scope.rb', line 25

def retrieve_scope
  @symbols
end

#syntax(name, &block) ⇒ Object 



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# File 'lib/scope.rb', line 33

def syntax(name, &block)
  self[name] =  Syntax.new(&block)
end