Class: ABNF::Compiler::Rule::Concatenation

Inherits:
Object
  • Object
show all
Includes:
ABNF::Compiler::Rule
Defined in:
lib/abnf/compiler/rule/concatenation.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ABNF::Compiler::Rule

#parse?

Constructor Details

#initialize(*rules) ⇒ Concatenation

Returns a new instance of Concatenation.



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# File 'lib/abnf/compiler/rule/concatenation.rb', line 9

def initialize *rules
  @rules = rules
end

Instance Attribute Details

#rules ⇒ Object (readonly)

Returns the value of attribute rules.



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# File 'lib/abnf/compiler/rule/concatenation.rb', line 7

def rules
  @rules
end

Instance Method Details

#parse(stream) ⇒ Object 



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# File 'lib/abnf/compiler/rule/concatenation.rb', line 13

def parse stream
  nodes = []

  stream.branch do
    rules.all? do |rule|
      node = rule.parse stream
      nodes << node if node
    end
  end

  return unless nodes.size == rules.size
  AST.sequence *nodes
end