Torsten Rüger
02807cf6f9
The parser presents the whole call that defines the block as a block. And so does the Ruby layer, as we don't want to do processing in ast. Just making it clearer, also Vool:: block will have to be renamed
39 lines
1.4 KiB
Ruby
39 lines
1.4 KiB
Ruby
module Ruby
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# The way the ruby parser presents a call with a block is by wrapping the
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# whole thing in a :block scope. It includes the send and the block definition.
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#
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# A block is in essence quite like a method, so the block definition is like a
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# method definition, except it is not bound to the class direcly, but the enclosing
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# method. The enclosing method also provides the scope.
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class RubyBlockStatement < Statement
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attr_reader :send , :args , :body
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def initialize( send , args , body )
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@send , @args , @body = send , args , body
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raise "no bod" unless @body
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end
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# In Vool we "hoist" the block definition through a local assignment, much
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# as we would other complex args (bit like in the Normalizer)
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# The block is then passed as a normal variable to the send. In other words, the
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# BlockStatement resolves to a list of Statements, the last of which is the send
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#
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def to_vool
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block_name = "implicit_block_#{object_id}".to_sym
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block = Vool::BlockStatement.new( @args.dup , @body.to_vool)
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assign = Vool::LocalAssignment.new( block_name , block)
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sendd = @send.to_vool
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if(sendd.is_a?(Vool::Statements))
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ret = sendd
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sendd = sendd.last
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else
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ret = Vool::Statements.new([sendd])
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end
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sendd.arguments << LocalVariable.new(block_name).to_vool
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ret.prepend(assign)
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ret
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end
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end
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end
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