Module: UnifiedRuby
- Included in:
- Doppelganger::Extractor, PostUnifier
- Defined in:
- lib/doppelganger/unified_ruby.rb
Instance Method Summary collapse
- #process(exp) ⇒ Object
- #rewrite_argscat(exp) ⇒ Object
- #rewrite_argspush(exp) ⇒ Object
- #rewrite_attrasgn(exp) ⇒ Object
- #rewrite_begin(exp) ⇒ Object
- #rewrite_block_pass(exp) ⇒ Object
- #rewrite_bmethod(exp) ⇒ Object
- #rewrite_call(exp) ⇒ Object
- #rewrite_dasgn(exp) ⇒ Object (also: #rewrite_dasgn_curr)
-
#rewrite_defn(exp) ⇒ Object
:defn is one of the most complex of all the ASTs in ruby.
- #rewrite_defs(exp) ⇒ Object
- #rewrite_dmethod(exp) ⇒ Object
- #rewrite_dvar(exp) ⇒ Object
- #rewrite_fcall(exp) ⇒ Object
- #rewrite_op_asgn1(exp) ⇒ Object
- #rewrite_resbody(exp) ⇒ Object
- #rewrite_rescue(exp) ⇒ Object
- #rewrite_splat(exp) ⇒ Object
- #rewrite_super(exp) ⇒ Object
- #rewrite_vcall(exp) ⇒ Object
- #rewrite_yield(exp) ⇒ Object
- #rewrite_zarray(exp) ⇒ Object
Instance Method Details
#process(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 9 def process exp exp = Sexp.from_array exp unless Sexp === exp or exp.nil? super end |
#rewrite_argscat(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 14 def rewrite_argscat exp _, ary, val = exp ary = s(:array, ary) unless ary.first == :array ary << s(:splat, val) end |
#rewrite_argspush(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 20 def rewrite_argspush exp exp[0] = :arglist exp end |
#rewrite_attrasgn(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 25 def rewrite_attrasgn(exp) last = exp.last if Sexp === last then last[0] = :arglist if last[0] == :array else exp << s(:arglist) end exp end |
#rewrite_begin(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 37 def rewrite_begin(exp) if exp.size > 2 exp else exp.last end end |
#rewrite_block_pass(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 45 def rewrite_block_pass exp if exp.size == 3 then _, block, recv = exp case recv.first when :super then recv << s(:block_pass, block) exp = recv when :call then recv.last << s(:block_pass, block) exp = recv else exp end end exp end |
#rewrite_bmethod(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 63 def rewrite_bmethod(exp) _, args, body = exp args ||= s(:array) body ||= s(:block) args = s(:args, args) unless args[0] == :array args = args[1] if args[1] && args[1][0] == :masgn # TODO: clean up args = args[1] if args[1] && args[1][0] == :array args[0] = :args # this is ugly because rewriters are depth first. # TODO: maybe we could come up with some way to do both forms of rewriting. args.map! { |s| if Sexp === s case s[0] when :lasgn then s[1] when :splat then :"*#{s[1][1]}" else raise "huh?: #{s.inspect}" end else s end } body = s(:block, body) unless body[0] == :block body.insert 1, args s(:scope, body) end |
#rewrite_call(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 98 def rewrite_call(exp) args = exp.last case args when nil exp.pop when Array case args.first when :array, :arglist then args[0] = :arglist when :argscat, :splat then exp[-1] = s(:arglist, args) else raise "unknown type in call #{args.first.inspect} in #{exp.inspect}" end return exp end exp << s(:arglist) exp end |
#rewrite_dasgn(exp) ⇒ Object Also known as: rewrite_dasgn_curr
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# File 'lib/doppelganger/unified_ruby.rb', line 120 def rewrite_dasgn(exp) exp[0] = :lasgn exp end |
#rewrite_defn(exp) ⇒ Object
:defn is one of the most complex of all the ASTs in ruby. We do one of 3 different translations:
1) From:
s(:defn, :name, s(:scope, s(:block, s(:args, ...), ...)))
s(:defn, :name, s(:bmethod, s(:masgn, s(:dasgn_curr, :args)), s(:block, ...)))
s(:defn, :name, s(:fbody, s(:bmethod, s(:masgn, s(:dasgn_curr, :splat)), s(:block, ...))))
to:
s(:defn, :name, s(:args, ...), s(:scope, s:(block, ...)))
2) From:
s(:defn, :writer=, s(:attrset, :@name))
to:
s(:defn, :writer=, s(:args), s(:attrset, :@name))
3) From:
s(:defn, :reader, s(:ivar, :@name))
to:
s(:defn, :reader, s(:args), s(:ivar, :@name))
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# File 'lib/doppelganger/unified_ruby.rb', line 158 def rewrite_defn(exp) weirdo = exp.ivar || exp.attrset fbody = exp.fbody(true) weirdo ||= fbody.cfunc if fbody exp.push(fbody.scope) if fbody unless weirdo args = exp.scope.block.args(true) unless weirdo exp.insert 2, args if args # move block_arg up and in block_arg = exp.scope.block.block_arg(true) rescue nil if block_arg block = args.block(true) args << :"&#{block_arg.last}" args << block if block end # patch up attr_accessor methods if weirdo then case when fbody && fbody.cfunc then exp.insert 2, s(:args, :"*args") when exp.ivar then exp.insert 2, s(:args) when exp.attrset then exp.insert 2, s(:args, :arg) else raise "unknown wierdo: #{wierdo.inpsect}" end end exp end |
#rewrite_defs(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 194 def rewrite_defs(exp) receiver = exp.delete_at 1 # TODO: I think this would be better as rewrite_scope, but that breaks others exp = s(exp.shift, exp.shift, s(:scope, s(:block, exp.scope.args))) if exp.scope && exp.scope.args result = rewrite_defn(exp) result.insert 1, receiver result end |
#rewrite_dmethod(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 208 def rewrite_dmethod(exp) exp.shift # type exp.shift # dmethod name exp.shift # scope / block / body end |
#rewrite_dvar(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 214 def rewrite_dvar(exp) exp[0] = :lvar exp end |
#rewrite_fcall(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 219 def rewrite_fcall(exp) exp[0] = :call exp.insert 1, nil rewrite_call(exp) end |
#rewrite_op_asgn1(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 226 def rewrite_op_asgn1(exp) exp[2][0] = :arglist # if exp[2][0] == :array exp end |
#rewrite_resbody(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 231 def rewrite_resbody(exp) exp[1] ||= s(:array) # no args body = exp[2] if body then case body.first when :lasgn, :iasgn then exp[1] << exp.delete_at(2) if body[-1] == s(:gvar, :$!) when :block then exp[1] << body.delete_at(1) if [:lasgn, :iasgn].include?(body[1][0]) && body[1][-1] == s(:gvar, :$!) end end exp << nil if exp.size == 2 # no body exp end |
#rewrite_rescue(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 250 def rewrite_rescue(exp) # SKETCHY HACK return exp if exp.size > 4 ignored = exp.shift body = exp.shift unless exp.first.first == :resbody resbody = exp.shift els = exp.shift unless exp.first.first == :resbody unless exp.empty? rest = exp.empty? ? nil : exp # graceful re-rewriting (see rewrite_begin) resbodies = [] unless rest then while resbody do resbodies << resbody resbody = resbody.resbody(true) end resbodies.each do |resbody| if resbody[2] && resbody[2][0] == :block && resbody[2].size == 2 then resbody[2] = resbody[2][-1] end end else resbodies = [resbody] + rest end resbodies << els if els s(:rescue, body, *resbodies).compact end |
#rewrite_splat(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 280 def rewrite_splat(exp) good = [:arglist, :argspush, :array, :svalue, :yield, :super].include? context.first exp = s(:array, exp) unless good exp end |
#rewrite_super(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 286 def rewrite_super(exp) return exp if exp.structure.flatten.first(3) == [:super, :array, :splat] exp.push(*exp.pop[1..-1]) if exp.size == 2 && exp.last.first == :array exp end |
#rewrite_vcall(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 292 def rewrite_vcall(exp) exp.push nil rewrite_fcall(exp) end |
#rewrite_yield(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 297 def rewrite_yield(exp) real_array = exp.pop if exp.size == 3 if exp.size == 2 then if real_array then exp[-1] = s(:array, exp[-1]) if exp[-1][0] != :array else exp.push(*exp.pop[1..-1]) if exp.last.first == :array end end exp end |
#rewrite_zarray(exp) ⇒ Object
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# File 'lib/doppelganger/unified_ruby.rb', line 311 def rewrite_zarray(exp) exp[0] = :array exp end |