Class: NodeClass

Inherits:
Object show all
Includes:
Piggly::Parser::Traversal
Defined in:
lib/piggly/parser/nodes.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Piggly::Parser::Traversal

#count, #find, #flatten, #inject, #select

Instance Attribute Details

#source_text ⇒ Object

The ‘text_value’ method can be used to read the parse tree as Treetop originally read it. The ‘source_text’ method returns redefined value or falls back to original text_value if none was set.



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# File 'lib/piggly/parser/nodes.rb', line 10

def source_text
  @source_text
end

Instance Method Details

#assignment? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 55

def assignment?; false end

#block? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 43

def block?; false end

#branch? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 42

def branch?; false end

#comment? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 49

def comment?; false end

#datatype? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 53

def datatype?; false end

#else? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 59

def else?; false; end

#expression? ⇒ Boolean

overridden in subclasses



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# File 'lib/piggly/parser/nodes.rb', line 41

def expression?; false end

#for? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 46

def for?; false end

#identifier? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 54

def identifier?; false end

#if? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 58

def if?; false; end

#indent(method = nil) ⇒ Object 



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# File 'lib/piggly/parser/nodes.rb', line 63

def indent(method = nil)
  if method and respond_to?(method)
    send(method).text_value[/\n[\t ]*\z/]
  else
    text_value[/\n[\t ]*\z/]
  end || ""
end

#keyword? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 61

def keyword?; false; end

#label? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 60

def label?; false; end

#loop? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 45

def loop?; false end

#named?(label) ⇒ Boolean

True if node is called label by the parent node



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# File 'lib/piggly/parser/nodes.rb', line 72

def named?(label)
  if p = parent
    p.respond_to?(label) and p.send(label).equal?(self)
  end
end

#sql? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 56

def sql?; false end

#statement? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 57

def statement?; false; end

#string? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 52

def string?; false end

#stub? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 44

def stub?; false end

#style ⇒ Object 



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# File 'lib/piggly/parser/nodes.rb', line 48

def style; nil end

#tag(prefix = nil, id = nil) ⇒ Object

Return a newly created Tag value, but only the tag.id is attached to the tree. The reason that is we maintain the Tags in a separate collection (to avoid a full traversal just to get the list of tags later), and we can retrieve the Tag associated with this node by its tag_id.



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# File 'lib/piggly/parser/nodes.rb', line 22

def tag(prefix = nil, id = nil)
  unless defined? @tag_id
    if named?(:body)
      Piggly::Tags::BlockTag.new(prefix, id)
    else
      Piggly::Tags::EvaluationTag.new(prefix, id)
    end.tap{|tag| @tag_id = tag.id }
  end
end

#tag_id ⇒ Object 



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# File 'lib/piggly/parser/nodes.rb', line 32

def tag_id
  @tag_id or raise RuntimeError, "Node is not tagged"
end

#tagged? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 36

def tagged?
  defined? @tag_id
end

#token? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 51

def token?; false end

#while? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 47

def while?; false end

#whitespace? ⇒ Boolean 



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# File 'lib/piggly/parser/nodes.rb', line 50

def whitespace?; false end