Class: Prattle::AST::Variable

Inherits:

Node

• Object
• Node
• Prattle::AST::Variable

show all

Defined in:

lib/prattle/ast/variable.rb

Instance Attribute Summary (collapse)

• - (Object) name readonly

  Returns the value of attribute name.

Class Method Summary (collapse)

• + (Object) grammar(g)
• + (Object) rule_name

Instance Method Summary (collapse)

• - (Object) bytecode(g)
• - (Variable) initialize(name) constructor

  A new instance of Variable.

Methods inherited from Node

#run

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# File 'lib/prattle/ast/variable.rb', line 10

def initialize(name)
  @name = name
end

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# File 'lib/prattle/ast/variable.rb', line 14

def name
  @name
end

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# File 'lib/prattle/ast/variable.rb', line 16

def self.grammar(g)
  g.variable = g.lit(/[a-zA-Z][a-zA-Z0-9_]*/) do |str|
    Variable.new(str)
  end
end

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# File 'lib/prattle/ast/variable.rb', line 6

def self.rule_name
  "variable"
end

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# File 'lib/prattle/ast/variable.rb', line 22

def bytecode(g)
  if /^[A-Z]/.match(@name)
    g.push_const @name.to_sym
  else
    depth, slot = g.state.scope.find_variable @name
    g.push_local slot
  end
end