Class: GlooLang::Exec::Stack

Inherits:
Object
  • Object
show all
Defined in:
lib/gloo_lang/exec/stack.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(engine, name) ⇒ Stack

Set up the stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 16

def initialize( engine, name )
  @engine = engine
  @name = name
  clear_stack
  @engine.log.debug "#{name} stack intialized..."
end

Instance Attribute Details

#stack ⇒ Object

Returns the value of attribute stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 11

def stack
  @stack
end

Instance Method Details

#clear_stack ⇒ Object

Clear the stack and the output file.



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# File 'lib/gloo_lang/exec/stack.rb', line 72

def clear_stack
  @stack = []
  self.update_out_file
end

#out_data ⇒ Object

Get stack data for output.



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# File 'lib/gloo_lang/exec/stack.rb', line 51

def out_data
  return @stack.map( &:display_value ).join( "\n" )
end

#out_file ⇒ Object

Get the file we’ll write debug information for the stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 58

def out_file
  return File.join( @engine.settings.debug_path, @name )
end

#pop ⇒ Object

Pop an item from the stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 35

def pop
  o = @stack.pop
  @engine.log.debug "#{@name}:pop #{o.display_value}"
  self.update_out_file if @engine.settings.debug
end

#push(obj) ⇒ Object

Push an item onto the stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 26

def push( obj )
  @engine.log.debug "#{@name}:push #{obj.display_value}"
  @stack.push obj
  self.update_out_file if @engine.settings.debug
end

#size ⇒ Object

Get the current size of the call stack.



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# File 'lib/gloo_lang/exec/stack.rb', line 44

def size
  return @stack.size
end

#update_out_file ⇒ Object

Update the stack trace file.



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# File 'lib/gloo_lang/exec/stack.rb', line 65

def update_out_file
  File.write( self.out_file, self.out_data )
end