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module Lrama
class Grammar
class Code
class PrinterCode < Code
def initialize(type:, token_code:, tag:)
super(type: type, token_code: token_code)
@tag = tag
end
private
# * ($$) *yyvaluep
# * (@$) *yylocationp
# * ($1) error
# * (@1) error
def reference_to_c(ref)
case
when ref.type == :dollar && ref.name == "$" # $$
member = @tag.member
"((*yyvaluep).#{member})"
when ref.type == :at && ref.name == "$" # @$
"(*yylocationp)"
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}."
else
raise "Unexpected. #{self}, #{ref}"
end
end
end
end
end
end
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