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 << <<END
#import "ruby.h"
#import "metal/rbcode.h"
#import "#{fname}.h"
#ifdef __cplusplus
extern "C" {
#endif
void Init_#{fname}() {
VALUE mMetal = rb_define_module("Metal");
VALUE cBase = rb_define_class_under(mMetal, "ParserBase", rb_cObject);
VALUE code;
END

@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 << <<END
}
#ifdef __cplusplus
}
#endif
END
	
	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