class BELParser::Language::Semantics::RelationshipNotListable
RelationshipNotListable
implements a {SemanticsFunction} that maps a {BELParser::Parsers::AST::Statement} to a {SemanticsWarning} if the relationship cannot be used for multiple terms in a list.
Public Class Methods
map(node, spec, _namespaces, will_match_partial = false)
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# File lib/bel_parser/language/semantics/relationship_not_listable.rb, line 14 def self.map(node, spec, _namespaces, will_match_partial = false) return nil unless node.is_a?(BELParser::Parsers::AST::Statement) return nil unless node.relationship? return nil unless node.object? return nil unless node.object.term? map_statement(node, spec) end
map_statement(stmt_node, spec)
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# File lib/bel_parser/language/semantics/relationship_not_listable.rb, line 23 def self.map_statement(stmt_node, spec) list_func = spec.function(:list) return nil unless list_func return nil unless stmt_node.object.child.function obj_func = stmt_node.object.child.function.identifier.string_literal return nil unless spec.function(obj_func.to_sym) == list_func rel = spec.relationship(stmt_node.relationship.string_literal.to_sym) return nil unless rel RelationshipNotMultipleWarning.new(stmt_node, spec, rel) unless rel.listable? end