101 lines
2.8 KiB
Ruby
101 lines
2.8 KiB
Ruby
# collection of the simple ones, int and strings and such
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module Ast
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class IntegerExpression < Expression
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# attr_reader :value
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def compile method , frame
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Virtual::IntegerConstant.new value
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end
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end
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class TrueExpression
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def compile method , frame
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Virtual::TrueValue.new
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end
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end
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class FalseExpression
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def compile method , frame
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Virtual::FalseValue.new
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end
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end
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class NilExpression
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def compile method , frame
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Virtual::NilValue.new
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end
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end
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class NameExpression < Expression
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# attr_reader :name
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# compiling name needs to check if it's a variable and if so resolve it
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# otherwise it's a method without args and a send is ussued.
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# this makes the namespace static, ie when eval and co are implemented method needs recompilation
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def compile method , frame
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return Virtual::Self.new( Virtual::Mystery.new ) if name == :self
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if method.has_var(name)
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frame.compile_get(method , name )
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else
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frame.compile_send( method , name , Virtual::Self.new( Virtual::Mystery.new ) )
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end
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end
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end
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class ModuleName < NameExpression
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def compile method , frame
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clazz = ::Virtual::Object.space.get_or_create_class name
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raise "uups #{clazz}.#{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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clazz
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end
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end
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class StringExpression < Expression
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# attr_reader :string
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def compile method , frame
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value = Virtual::StringConstant.new(string)
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::Virtual::Object.space.add_object value
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value
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end
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end
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class AssignmentExpression < Expression
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#attr_reader :left, :right
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def compile method , frame
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raise "must assign to NameExpression , not #{left}" unless left.instance_of? NameExpression
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r = right.compile(method,frame)
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frame.compile_set( method , left.name , r )
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end
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def old_scratch
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if operator == "=" # assignment, value based
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if(left.is_a? VariableExpression)
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left.make_setter
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l_val = left.compile(context)
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elsif left.is_a?(NameExpression)
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puts context.inspect unless context.locals
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l_val = context.locals[left.name]
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if( l_val ) #variable existed, move data there
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l_val = l_val.move( into , r_val)
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else
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l_val = context.function.new_local.move( into , r_val )
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end
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context.locals[left.name] = l_val
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else
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raise "Can only assign variables, not #{left}"
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end
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return l_val
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end
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end
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end
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class VariableExpression < NameExpression
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def compile method , frame
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method.add Virtual::ObjectGet.new(name)
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Virtual::Return.new( Virtual::Mystery.new )
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end
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end
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end |