48 lines
1.5 KiB
Ruby
48 lines
1.5 KiB
Ruby
module Phisol
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# collection of the simple ones, int and strings and such
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Compiler.class_eval do
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# Constant statements can by definition be evaluated at compile time.
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# But that does not solve their storage, ie they need to be accessible at runtime from _somewhere_
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# So we view ConstantExpressions like functions that return the value of the constant.
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# In other words, their storage is the return slot as it would be for a method
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# The current approach moves the constant into a variable before using it
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# But in the future (in the one that holds great things) we optimize those unneccesay moves away
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def on_int statement
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int = statement.first
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reg = use_reg :int
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@method.source.add_code Register::LoadConstant.new( statement, int , reg )
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return reg
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end
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def on_true statement
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reg = use_reg :ref
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@method.source.add_code Register::LoadConstant.new( statement, true , reg )
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return reg
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end
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def on_false statement
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reg = use_reg :ref
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@method.source.add_code Register::LoadConstant.new( statement, false , reg )
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return reg
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end
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def on_nil statement
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reg = use_reg :ref
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@method.source.add_code Register::LoadConstant.new( statement, nil , reg )
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return reg
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end
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def on_string statement
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value = statement.first.to_sym
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reg = use_reg :ref
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@method.source.constants << value
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@method.source.add_code Register::LoadConstant.new( statement, value , reg )
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return reg
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end
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end
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end
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