Class: BELParser::Language::Semantics::MultipleSubjectObject

Inherits:
Object
  • Object
show all
Includes:
SemanticsFunction
Defined in:
lib/bel_parser/language/semantics/multiple_subject_object.rb

Overview

MultipleSubjectObject implements a SemanticsFunction that maps a Parsers::AST::Statement to a SemanticsWarning if the subject term is referenced as an argument of the object list term.

Class Method Summary collapse

Class Method Details

.map(stmt_node, spec, _namespaces, will_match_partial = false) ⇒ Object 



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# File 'lib/bel_parser/language/semantics/multiple_subject_object.rb', line 14

def self.map(stmt_node, spec, _namespaces, will_match_partial = false)
  return nil unless stmt_node.is_a?(BELParser::Parsers::AST::Statement)
  return nil unless stmt_node.relationship?
  return nil if stmt_node.relationship.string_literal.nil?
  rel = spec.relationship(stmt_node.relationship.string_literal.to_sym)
  return nil unless rel
  return nil unless rel.listable?

  list_func = spec.function(:list)
  return nil unless list_func
  return nil unless stmt_node.object?
  return nil unless stmt_node.object.term?

  map_subject_object(stmt_node, rel, spec)
end

.map_subject_object(stmt_node, rel, spec) ⇒ Object 



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# File 'lib/bel_parser/language/semantics/multiple_subject_object.rb', line 30

def self.map_subject_object(stmt_node, rel, spec)
  sub_term  = stmt_node.subject.term
  list_term = stmt_node.object.child

  return nil if list_term.arguments.empty?
  if list_term.arguments.any? { |arg| arg.child && sub_term == arg.child }
    MultipleSubjectObjectWarning.new(stmt_node, spec, rel)
  end
end