Class: Metal::Generator::Meta

Inherits:
Object
  • Object
show all
Defined in:
lib/metal/generator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(codes) ⇒ Meta

Returns a new instance of Meta.



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# File 'lib/metal/generator.rb', line 36

def initialize(codes)
  @grammars, @precodes = codes.partition {|i| i.is_a?(Grammar) }
  @vars = []
  @grammar = nil
  @rule = nil
end

Instance Attribute Details

#grammar ⇒ Object

Returns the value of attribute grammar.



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# File 'lib/metal/generator.rb', line 89

def grammar
  @grammar
end

#meta ⇒ Object

Returns the value of attribute meta.



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# File 'lib/metal/generator.rb', line 89

def meta
  @meta
end

#rule ⇒ Object

Returns the value of attribute rule.



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# File 'lib/metal/generator.rb', line 89

def rule
  @rule
end

Instance Method Details

#generate(fname, source = '', header = '', rbcode = '') ⇒ Object 



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# File 'lib/metal/generator.rb', line 42

def generate(fname, source = '', header = '', rbcode = '')
  @grammars.each {|grammar|
    grammar.preprocess(self)
  }
  
  header << "#import \"metal/runtime.h\"\n"
  source << "#import \"#{fname}.h\"\n"
  source << "using namespace Metal;\n"
  
  @vars.sort!
  @vars.uniq!
  @vars.each {|var|
    source << "static param_t const PARAM_#{var} = param_lookup(\"#{var}\");\n"
  }
  
  rbcode << "#import \"ruby.h\"\n#import \"metal/rbcode.h\"\n#import \"\#{fname}.h\"\n#ifdef __cplusplus\nextern \"C\" {\n#endif\nvoid Init_\#{fname}() {\nVALUE mMetal = rb_define_module(\"Metal\");\nVALUE cBase = rb_define_class_under(mMetal, \"ParserBase\", rb_cObject);\nVALUE code;\n"

@precodes.each {|precode|
  code, code_len = Generator.escape_quoated_string(precode.code)
  rbcode << "rb_eval_string(\"#{code}\");\n"
}

@grammars.each {|grammar|
  grammar.generate(self, source, header, rbcode)
}

rbcode << "}\n#ifdef __cplusplus\n}\n#endif\n"
  
  return [source, header, rbcode]
end

#register_var(name) ⇒ Object 



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# File 'lib/metal/generator.rb', line 91

def register_var(name)
  @vars.push name
end