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Versions: 6
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Contents
require 'bel_parser/parsers/ast/node'
module BELParser
module Language
module Semantics
# NonObjectList implements a {SemanticsFunction} that maps a
# {BELParser::Parsers::AST::Object} to a {SemanticsWarning} if the
# object of a multiple relationship *is not* a list term.
class NonObjectList
include SemanticsFunction
private_class_method :new
def self.map(stmt_node, spec, _namespaces)
return nil unless stmt_node.is_a?(BELParser::Parsers::AST::Statement)
return nil unless stmt_node.relationship?
return nil unless stmt_node.object?
return nil if stmt_node.relationship.string_literal.nil?
list_func = spec.function(:list)
return nil unless list_func
rel = spec.relationship(stmt_node.relationship.string_literal.to_sym)
return nil unless rel
return nil unless rel.listable?
map_object(stmt_node.object, rel, list_func, spec)
end
def self.map_object(obj_node, rel, list_func, spec)
return NonObjectListWarning.new(
obj_node,
spec,
rel) unless obj_node.term?
return nil unless obj_node.child.function
obj_func = obj_node.child.function.identifier.string_literal
NonObjectListWarning.new(
obj_node,
spec,
rel) unless spec.function(obj_func.to_sym) == list_func
end
end
# Represents a {SemanticsWarning} when a
# multiple relationship {BELParser::Parsers::AST::Statement} does not
# reference an object list term.
class NonObjectListWarning < SemanticsWarning
def initialize(statement_node, spec, rel)
super(statement_node, spec)
@rel = rel
end
def to_s
%(The "#{@rel.long}" relationship must take a list() object term.)
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems