64 lines
2.0 KiB
Ruby
64 lines
2.0 KiB
Ruby
module Ast
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# assignment, like operators are really function calls
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class CallSiteExpression < Expression
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attr_reader :name, :args , :receiver
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def initialize name, args , receiver = Ast::NameExpression.new(:self)
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@name = name.to_sym
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@args = args
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@receiver = receiver
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end
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def compile context , into
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params = args.collect{ |a| a.compile(context, into) }
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if receiver.name == :self
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function = context.current_class.get_or_create_function(name)
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elsif receiver.is_a? ModuleName
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c_name = receiver.name
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clazz = context.object_space.get_or_create_class c_name
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raise "uups #{clazz}.#{c_name}" unless clazz
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#class qualifier, means call from metaclass
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clazz = clazz.meta_class
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function = clazz.get_or_create_function(name)
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elsif receiver.is_a? VariableExpression
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raise "not implemented instance var:#{receiver}"
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else
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raise "not implemented case (dare i say system error):#{receiver}"
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end
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raise "No such method error #{clazz.to_s}:#{name}" if function == nil
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call = Vm::CallSite.new( name , params , function)
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current_function = context.function
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current_function.save_locals(context , into) if current_function
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call.load_args into
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call.do_call into
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current_function.restore_locals(context , into) if current_function
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puts "compile call #{function.return_type}"
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function.return_type
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end
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def inspect
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self.class.name + ".new(" + name.inspect + ", ["+
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args.collect{|m| m.inspect }.join( ",") + "] ," + receiver.inspect + ")"
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end
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def to_s
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"#{name}(" + args.join(",") + ")"
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end
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def attributes
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[:name , :args , :receiver]
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end
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end
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class VariableExpression < CallSiteExpression
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def initialize name
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super( :_get_instance_variable , [StringExpression.new(name)] )
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end
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def inspect
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self.class.name + ".new(" + args[0].string.inspect + ")"
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end
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end
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end |