Class: Metal::Generator::Rule

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, or_set) ⇒ Rule

Returns a new instance of Rule.



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# File 'lib/metal/generator.rb', line 181

def initialize(name, or_set)
	@name = name
	@or_set = or_set
	
	@serial = 0
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/metal/generator.rb', line 196

def name
  @name
end

Instance Method Details

#generate(ctx, source) ⇒ Object 



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# File 'lib/metal/generator.rb', line 191

def generate(ctx, source)
	ctx.rule = self
	source << "Env env;\n"
	@or_set.generate(ctx, source)
end

#preprocess(ctx) ⇒ Object 



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# File 'lib/metal/generator.rb', line 187

def preprocess(ctx)
	ctx.rule = self
	@or_set.preprocess(ctx)
end

#with_lambda(source, &block) ⇒ Object 



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# File 'lib/metal/generator.rb', line 198

def with_lambda(source, &block)
	obj = "rule_#{@name}_#{@serial+=1}"
	source << "struct #{obj}_t : Lambda {\n"
		source << "#{obj}_t(Context* _ctx, Env& _env) : Lambda(_ctx, _env) {}\n"
		source << "VALUE call() {\n"
			source << "return ({\n"
			yield
			source << "});\n"
		source << "}\n"
	source << "} #{obj}(ctx, env);\n"
	obj
end