22 lines
547 B
Ruby
22 lines
547 B
Ruby
module Imbecile
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class Grammar
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# @return [Boolean]
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# Whether loading was successful.
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def load(input_file)
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File.read(input_file).each_line.each_with_index do |line, line_index|
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line = line.chomp
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line_number = line_index + 1
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if line =~ /^\s*token\s+(\S+)\s+(.*)$/
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name, expr = $1, $2
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unless name =~ /^[a-zA-Z_][a-zA-Z_0-9]*$/
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$stderr.puts "Invalid token name #{name} on line #{line_number}"
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return false
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end
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end
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end
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end
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end
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end
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