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module Lrama
class Grammar
class Code
class NoReferenceCode < Code
private
# * ($$) error
# * (@$) error
# * ($:$) error
# * ($1) error
# * (@1) error
# * ($:1) error
def reference_to_c(ref)
case
when ref.type == :dollar # $$, $n
raise "$#{ref.value} can not be used in #{type}."
when ref.type == :at # @$, @n
raise "@#{ref.value} can not be used in #{type}."
when ref.type == :index # $:$, $:n
raise "$:#{ref.value} can not be used in #{type}."
else
raise "Unexpected. #{self}, #{ref}"
end
end
end
end
end
end
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