101 lines
2.5 KiB
Ruby
101 lines
2.5 KiB
Ruby
require "erb"
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require "set"
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require_relative "propane/cli"
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require_relative "propane/code_point_range"
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require_relative "propane/fa"
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require_relative "propane/fa/state"
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require_relative "propane/fa/state/transition"
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require_relative "propane/grammar"
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require_relative "propane/lexer"
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require_relative "propane/lexer/dfa"
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require_relative "propane/parser"
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require_relative "propane/parser/item"
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require_relative "propane/parser/item_set"
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require_relative "propane/regex"
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require_relative "propane/regex/nfa"
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require_relative "propane/regex/unit"
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require_relative "propane/rule_set"
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require_relative "propane/rule"
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require_relative "propane/token"
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require_relative "propane/version"
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class Propane
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# EOF.
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TOKEN_EOF = 0xFFFFFFFC
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# Decoding error.
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TOKEN_DECODE_ERROR = 0xFFFFFFFD
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# Token ID for a "dropped" token.
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TOKEN_DROP = 0xFFFFFFFE
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# Invalid token ID.
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TOKEN_NONE = 0xFFFFFFFF
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class Error < RuntimeError
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end
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def initialize(input)
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grammar = Grammar.new(input)
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@classname = grammar.classname
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@modulename = grammar.modulename
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@tokens = grammar.tokens
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@rule_sets = grammar.rule_sets
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end
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def generate(output_file, log_file)
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expand_rules
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lexer = Lexer.new(@tokens)
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parser = Parser.new(@tokens, @rule_sets)
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classname = @classname || File.basename(output_file).sub(%r{[^a-zA-Z0-9].*}, "").capitalize
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erb = ERB.new(File.read(File.join(File.dirname(File.expand_path(__FILE__)), "../assets/parser.d.erb")), trim_mode: "<>")
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result = erb.result(binding.clone)
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File.open(output_file, "wb") do |fh|
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fh.write(result)
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end
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end
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private
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def expand_rules
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@rule_sets.each do |rule_name, rule_set|
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if @tokens.include?(rule_name)
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raise Error.new("Rule name collides with token name #{rule_name}")
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end
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end
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unless @rule_sets["Start"]
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raise Error.new("Start rule not found")
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end
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@rule_sets.each do |rule_name, rule_set|
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rule_set.rules.each do |rule|
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rule.components.map! do |component|
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if @tokens[component]
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@tokens[component]
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elsif @rule_sets[component]
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@rule_sets[component]
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else
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raise Error.new("Symbol #{component} not found")
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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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class << self
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def run(input_file, output_file, log_file)
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begin
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propane = Propane.new(File.read(input_file))
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propane.generate(output_file, log_file)
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rescue Error => e
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$stderr.puts e.message
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return 2
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end
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return 0
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end
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end
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end
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