92 lines
2.9 KiB
Ruby
92 lines
2.9 KiB
Ruby
module Mom
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# MethodCompiler is used to generate Mom instructions for methods
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# and to instantiate the methods correctly.
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class MethodCompiler < CallableCompiler
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def initialize( method )
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super(method)
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end
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def source_name
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"#{@callable.self_type.name}.#{@callable.name}"
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end
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def get_method
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@callable
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end
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# sometimes the method is used as source (tb reviewed)
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def source
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@callable
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end
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# drop down to risc by converting this compilers instructions to risc.
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# and the doing the same for any block_compilers
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def to_risc
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risc_compiler = Risc::MethodCompiler.new(@callable , mom_instructions)
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instructions_to_risc(risc_compiler)
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risc_compiler
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end
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# helper method for builtin mainly
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# the class_name is a symbol, which is resolved to the instance_type of that class
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#
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# return compiler_for_type with the resolved type
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#
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def self.compiler_for_class( class_name , method_name , args , frame )
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raise "create_method #{class_name}.#{class_name.class}" unless class_name.is_a? Symbol
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clazz = Parfait.object_space.get_class_by_name! class_name
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compiler_for_type( clazz.instance_type , method_name , args , frame)
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end
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def add_method_to( target )
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target.add_method( @callable )
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end
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def create_block(arg_type , frame_type)
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@callable.create_block(arg_type ,frame_type)
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end
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# create a method for the given type ( Parfait type object)
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# method_name is a Symbol
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# args a hash that will be converted to a type
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# the created method is set as the current and the given type too
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# return the compiler
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def self.compiler_for_type( type , method_name , args , frame)
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raise "create_method #{type.inspect} is not a Type" unless type.is_a? Parfait::Type
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raise "Args must be Type #{args}" unless args.is_a?(Parfait::Type)
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raise "create_method #{method_name}.#{method_name.class}" unless method_name.is_a? Symbol
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method = type.create_method( method_name , args , frame)
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self.new(method)
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end
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# determine how given name need to be accsessed.
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# For methods the options are args or frame
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def slot_type_for(name)
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if index = @callable.arguments_type.variable_index(name)
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return ["arg#{index}".to_sym]
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end
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index = @callable.frame_type.variable_index(name)
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raise "no such local or argument #{name} for #{callable.name}:#{callable.frame_type.hash}" unless index
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return ["local#{index}".to_sym]
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end
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# return true or false if the given name is in scope (arg/local)
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def in_scope?(name)
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ret = true if @callable.arguments_type.variable_index(name)
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ret = @callable.frame_type.variable_index(name) unless ret
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ret
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end
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# Only for init, as init has no return
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# kind of private
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def _reset_for_init
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@mom_instructions = Label.new(source_name, source_name)
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@current = @mom_instructions
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end
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end
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end
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