rubyx/lib/ast/return_expression.rb

33 lines
1012 B
Ruby

module Ast
class ReturnExpression < Expression
attr_reader :expression
def initialize expression
@expression = expression
end
def inspect
self.class.name + ".new(" + expression.inspect + " )"
end
def to_s
"return #{expression}\n"
end
def attributes
[:expression]
end
def compile context , into
expression_value = expression.compile(context , into)
puts "compiled return expression #{expression_value.inspect}, now return in 7"
# copied from function expression: TODO make function
return_reg = Vm::Integer.new(7)
if expression_value.is_a?(Vm::IntegerConstant) or expression_value.is_a?(Vm::StringConstant)
return_reg.load into , expression_value if expression_value.register != return_reg.register
else
return_reg.move( into, expression_value ) if expression_value.register != return_reg.register
end
#function.set_return return_reg
return return_reg
end
end
end