49 lines
1.6 KiB
Ruby
49 lines
1.6 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 expressions 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 expression
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int = expression.first
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to = Virtual::Return.new(Virtual::Integer , int)
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@method.source.add_code Virtual::Set.new( int , to )
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to
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end
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def on_true expression
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to = Virtual::Return.new(Virtual::Reference , true )
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@method.source.add_code Virtual::Set.new( true , to )
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to
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end
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def on_false expression
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to = Virtual::Return.new(Virtual::Reference , false)
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@method.source.add_code Virtual::Set.new( false , to )
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to
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end
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def on_nil expression
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to = Virtual::Return.new(Virtual::Reference , nil)
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@method.source.add_code Virtual::Set.new( nil , to )
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to
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end
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def on_string expression
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# Clearly a TODO here to implement strings rather than reusing symbols
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value = expression.first.to_sym
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to = Virtual::Return.new(Virtual::Reference , value)
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@method.source.constants << value
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@method.source.add_code Virtual::Set.new( value , to )
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to
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end
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end
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end
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