71 lines
1.9 KiB
Ruby
71 lines
1.9 KiB
Ruby
module Vool
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class MethodStatement < Statement
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attr_reader :name, :args , :body
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def initialize( name , args , body )
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@name , @args , @body = name , args , body
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raise "no bod" unless @body
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end
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def to_mom(clazz)
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raise( "no class in #{self}") unless clazz
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method = make_method(clazz)
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compiler = method.compiler_for(clazz.instance_type)
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each do |node| ## TODO: must account for nested blocks (someday)
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next unless node.is_a?(BlockStatement)
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compiler.block_compilers << node.to_mom(compiler)
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end
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compiler
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end
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# Class to be passed in is a Parfait class
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# return VoolMethod
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#
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# extracted call to create the VoolMethod as this is the place
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# where we have all the info. Used in testing.
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def make_method(clazz)
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clazz.add_method_for(name , make_arg_type , make_frame , body )
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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 has_yield?
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each{|statement| return true if statement.is_a?(YieldStatement)}
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return false
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end
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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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type_hash[:implicit_block] = :Block if has_yield?
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Parfait::NamedList.type_for( type_hash )
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end
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def to_s(depth = 0)
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arg_str = @args.collect{|a| a.to_s}.join(', ')
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at_depth(depth , "def #{name}(#{arg_str})" , @body.to_s(depth + 1) , "end")
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end
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private
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def make_frame
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nodes = []
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@body.each { |node| nodes << node }
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nodes.dup.each do |node|
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next unless node.is_a?(BlockStatement)
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node.each {|block_scope| nodes.delete(block_scope)}
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end
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type_hash = {}
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nodes.each do |node|
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next unless node.is_a?(LocalVariable) or node.is_a?(LocalAssignment)
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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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