Torsten Rüger
f87526f86f
Class, Method and Lambda (was block) are expressions. Just making things clearer, especially for the blocks (ahem, lambdas) is matters. wip
63 lines
1.8 KiB
Ruby
63 lines
1.8 KiB
Ruby
module Vool
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class LambdaExpression < Expression
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attr_reader :args , :body , :clazz
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def initialize( args , body , clazz = nil)
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@args , @body = args , body
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raise "no bod" unless @body
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@clazz = clazz
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end
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# because of normalization (of send), slot_definition is called first,
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# to assign the block to a variable.
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#
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# This means we do the compiler here (rather than to_mom, which is in
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# fact never called)
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def to_slot(compiler)
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return Mom::SlotDefinition.new(Mom::LambdaConstant.new(parfait_block(compiler)) , [])
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end
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# create a block, a compiler for it, comile the bock and add the compiler(code)
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# to the method compiler for further processing
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def to_mom( compiler )
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parfait_block = self.parfait_block(compiler)
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block_compiler = Mom::BlockCompiler.new( parfait_block , compiler.get_method )
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head = body.to_mom( block_compiler )
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block_compiler.add_code(head)
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block_compiler
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end
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def each(&block)
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block.call(self)
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@body.each(&block)
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end
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def to_s(depth=0)
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"Block #{args} #{body}"
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end
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# create the parfait block (parfait representation of the block, a Callable similar
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# to CallableMethod)
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def parfait_block(compiler)
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return @parfait_block if @parfait_block
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@parfait_block = compiler.create_block( make_arg_type , make_frame(compiler))
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end
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private
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def make_arg_type( )
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type_hash = {}
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@args.each {|arg| type_hash[arg] = :Object }
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Parfait::NamedList.type_for( type_hash )
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end
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def make_frame(compiler)
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type_hash = {}
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@body.each do |node|
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next unless node.is_a?(LocalVariable) or node.is_a?(LocalAssignment)
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next if compiler.in_scope?(node.name)
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type_hash[node.name] = :Object
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end
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Parfait::NamedList.type_for( type_hash )
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end
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end
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end
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