Module: KPeg

Defined in:

lib/kpeg.rb,
lib/kpeg/match.rb,
lib/kpeg/parser.rb,
lib/kpeg/grammar.rb,
lib/kpeg/version.rb,
lib/kpeg/position.rb,
lib/kpeg/code_generator.rb,
lib/kpeg/compiled_parser.rb,
lib/kpeg/grammar_renderer.rb

Defined Under Namespace

Modules: Position Classes: Action, AndPredicate, CharRange, Choice, CodeGenerator, Collect, CompiledParser, Dot, ForeignInvokeRule, FormatParser, Grammar, GrammarRenderer, InvokeRule, LiteralRegexp, LiteralString, Match, MatchComposition, MatchString, Multiple, NotPredicate, Operator, Parser, Rule, RuleReference, Sequence, Tag

Constant Summary

VERSION =

"0.1"

Class Method Summary (collapse)

• + (Object) compile(str, name, scope = Object)
• + (Object) grammar {|g| ... }
• + (Object) load(file, name)
• + (Object) load_grammar(file, log = false)
• + (Object) match(str, gram)

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# File 'lib/kpeg.rb', line 32

def self.compile(str, name, scope=Object)
  parser = KPeg::FormatParser.new str
  unless parser.parse
    parser.raise_error
  end

  cg = KPeg::CodeGenerator.new name, parser.grammar

  code = cg.output

  scope.module_eval code
  true
end

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# File 'lib/kpeg.rb', line 2

def self.grammar
  g = Grammar.new
  yield g
  g
end

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# File 'lib/kpeg.rb', line 20

def self.load(file, name)
  grammar = load_grammar(file)
  cg = KPeg::CodeGenerator.new name, grammar

  code = cg.output

  warn "[Loading parser '#{name}' => #{code.size} bytes]"

  Object.module_eval code
  true
end

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# File 'lib/kpeg.rb', line 13

def self.load_grammar(file, log=false)
  parser = KPeg::FormatParser.new File.read(file)
  parser.parse

  return parser.grammar
end

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# File 'lib/kpeg.rb', line 8

def self.match(str, gram)
  scan = Parser.new(str, gram)
  scan.parse
end