80 lines
2.1 KiB
Ruby
80 lines
2.1 KiB
Ruby
# A Method (at runtime , sis in Parfait) is static object that primarily holds the executable
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# code.
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# For reflection also holds arguments and such
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#
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module Parfait
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# static description of a method
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# name
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# arg_names
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# known local variable names
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# temp variables (numbered)
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# executable code
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# ps, the compiler injects its own info, see virtual::compiled_method_info
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class Method < Object
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def initialize clazz , name , arg_names
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super()
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raise "No class #{name}" unless clazz
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self.for_class = clazz
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self.name = name
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self.code = BinaryCode.new name
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raise "Wrong type, expect List not #{arg_names.class}" unless arg_names.is_a? List
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self.arg_names = arg_names
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self.locals = List.new
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self.tmps = List.new
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end
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attributes [:name , :arg_names , :for_class , :code , :locals , :tmps]
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# determine whether this method has a variable by the given name
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# variables are locals and and arguments
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# used to determine if a send must be issued
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# return index of the name into the message if so
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def has_var name
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raise "has_var #{name}.#{name.class}" unless name.is_a? Symbol
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index = has_arg(name)
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return index if index
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has_local(name)
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end
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# determine whether this method has an argument by the name
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def has_arg name
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raise "has_arg #{name}.#{name.class}" unless name.is_a? Symbol
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self.arg_names.index_of name
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end
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# determine if method has a local variable or tmp (anonymous local) by given name
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def has_local name
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raise "has_local #{name}.#{name.class}" unless name.is_a? Symbol
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index = self.locals.index_of(name)
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index = self.tmps.index_of(name) unless index
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index
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end
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def ensure_local name
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index = has_local name
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return index if index
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self.locals.push name
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self.locals.get_length
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end
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def get_var name
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var = has_var name
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raise "no var #{name} in method #{self.name} , #{self.locals} #{self.arg_names}" unless var
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var
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end
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def sof_reference_name
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self.name
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end
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end
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end
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