Class: Keisan::AST::LineBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/keisan/ast/line_builder.rb

Instance Method Summary collapse

Constructor Details

#initialize(components) ⇒ LineBuilder

Build from parser



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# File 'lib/keisan/ast/line_builder.rb', line 5

def initialize(components)
  @components = components
  @nodes = components_to_basic_nodes(@components)

  # Negative means not an operator
  @priorities = @nodes.map {|node| node.is_a?(Keisan::Parsing::Operator) ? node.priority : -1}

  consume_operators!

  case @nodes.count
  when 0
    # Empty string, set to just Null
    @nodes = [Keisan::AST::Null.new]
  when 1
    # Good
  else
    raise Keisan::Exceptions::ASTError.new("Should end up with a single node")
  end
end

Instance Method Details

#ast ⇒ Object 



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# File 'lib/keisan/ast/line_builder.rb', line 29

def ast
  node
end

#node ⇒ Object 



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# File 'lib/keisan/ast/line_builder.rb', line 25

def node
  @nodes.first
end