Class: FastRuby::Context

Inherits:
Object show all
Defined in:
lib/fastruby/translator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Context 



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# File 'lib/fastruby/translator.rb', line 36

def initialize
  @infer_lvar_map = Hash.new
  @extra_code = ""
  @options = {}

  extra_code << '#include "node.h"
  '

  extra_code << "static VALUE _rb_gvar_set(void* ge,VALUE value) {
    rb_gvar_set((struct global_entry*)ge,value);
    return value;
  }
  "

  extra_code << "static VALUE _rb_ivar_set(VALUE recv,ID idvar, VALUE value) {
    rb_ivar_set(recv,idvar,value);
    return value;
  }
  "

  extra_code << "static VALUE _lvar_assing(VALUE* destination,VALUE value) {
    *destination = value;
    return value;
  }
  "

end

Instance Attribute Details

#alt_method_name ⇒ Object

Returns the value of attribute alt_method_name.



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# File 'lib/fastruby/translator.rb', line 29

def alt_method_name
  @alt_method_name
end

#extra_code ⇒ Object (readonly)

Returns the value of attribute extra_code.



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# File 'lib/fastruby/translator.rb', line 33

def extra_code
  @extra_code
end

#infer_lvar_map ⇒ Object

Returns the value of attribute infer_lvar_map.



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# File 'lib/fastruby/translator.rb', line 28

def infer_lvar_map
  @infer_lvar_map
end

#infer_self ⇒ Object

Returns the value of attribute infer_self.



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# File 'lib/fastruby/translator.rb', line 32

def infer_self
  @infer_self
end

#locals ⇒ Object

Returns the value of attribute locals.



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# File 'lib/fastruby/translator.rb', line 30

def locals
  @locals
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/fastruby/translator.rb', line 31

def options
  @options
end

#yield_signature ⇒ Object (readonly)

Returns the value of attribute yield_signature.



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# File 'lib/fastruby/translator.rb', line 34

def yield_signature
  @yield_signature
end

Instance Method Details

#anonymous_function(method) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 73

def anonymous_function(method)

  name = "anonymous" + rand(10000000).to_s
  extra_code << method.call(name)

  name
end

#directive(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 820

def directive(tree)
  recv = tree[1]
  mname = tree[2]
  args = tree[3]

  if mname == :infer
    return to_c(recv)
  elsif mname == :lvar_type
    lvar_name = args[1][1] || args[1][2]
    lvar_type = eval(args[2][1].to_s)

    @infer_lvar_map[lvar_name] = lvar_type
    return ""
  elsif mname == :block_given?
    return "#{locals_accessor}block_function_address == 0 ? Qfalse : Qtrue"
  elsif mname == :inline_c
    code = args[1][1]

    caller_code = proc { |name| "
       static VALUE #{name}(VALUE param) {
        #{@locals_struct} *plocals = (void*)param;
        #{code};
        return Qnil;
      }
     "
    }

    return anonymous_function(caller_code)+"((VALUE)plocals)"
  else
    nil
  end
end

#infer_type(recv) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 794

def infer_type(recv)
  if recv[0] == :call
    if recv[2] == :infer
      eval(recv[3].last.last.to_s)
    end
  elsif recv[0] == :lvar
    @infer_lvar_map[recv[1]]
  elsif recv[0] == :self
    @infer_self
  elsif recv[0] == :str or recv[0] == :lit
    recv[1].class
  else
    nil
  end
end

#locals_accessor ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 525

def locals_accessor
  "plocals->"
end

#locals_pointer ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 529

def locals_pointer
  "plocals"
end

#on_block ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 64

def on_block
  yield
end

#to_c(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 68

def to_c(tree)
  return "Qnil" unless tree
  send("to_c_" + tree[0].to_s, tree);
end

#to_c_and(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 588

def to_c_and(tree)
  "(RTEST(#{to_c tree[1]}) && RTEST(#{to_c tree[2]})) ? Qtrue : Qfalse"
end

#to_c_array(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 455

def to_c_array(tree)
  if tree.size > 1
    strargs = tree[1..-1].map{|subtree| to_c subtree}.join(",")
    "rb_ary_new3(#{tree.size-1}, #{strargs})"
  else
    "rb_ary_new3(0)"
  end
end

#to_c_attrasgn(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 85

def to_c_attrasgn(tree)
  to_c_call(tree)
end

#to_c_block(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 390

def to_c_block(tree)

  str = ""
  str = tree[1..-2].map{ |subtree|
    to_c(subtree)
  }.join(";")

  if tree[-1][0] != :return
    str = str + ";last_expression = #{to_c(tree[-1])};"
  else
    str = str + ";#{to_c(tree[-1])};"
  end

  caller_code = proc { |name| "
    static VALUE #{name}(VALUE param) {
      #{@locals_struct} *plocals = (void*)param;
      VALUE last_expression;

      #{str}

      return last_expression;
      }
    "
  }

  anonymous_function(caller_code) + "((VALUE)#{locals_pointer})"
end

#to_c_call(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 631

def to_c_call(tree)
  recv = tree[1]
  mname = tree[2]
  args = tree[3]

  directive_code = directive(tree)
  if directive_code
    return directive_code
  end

  strargs = args[1..-1].map{|arg| to_c arg}.join(",")

  argnum = args.size - 1

  recv = recv || s(:self)

  recvtype = infer_type(recv)

  if recvtype

    address = nil
    mobject = nil

    inference_complete = true
    signature = [recvtype]

    args[1..-1].each do |arg|
      argtype = infer_type(arg)
      if argtype
        signature << argtype
      else
        inference_complete = false
      end
    end

    convention = nil

    if recvtype.respond_to? :method_tree and inference_complete

      if recvtype.method_tree[tree[2]]
        mobject = recvtype.build(signature, tree[2])
        convention = :fastruby
      else
        mobject = recvtype.instance_method(tree[2])
        convention = :cruby
      end
    else
      mobject = recvtype.instance_method(tree[2])
      convention = :cruby
    end

    address = getaddress(mobject)
    len = getlen(mobject)

    extraargs = ""
    extraargs = ", Qfalse" if convention == :fastruby

    if address then
      if argnum == 0
        value_cast = "VALUE"
        value_cast = value_cast + ", VALUE" if convention == :fastruby

        if convention == :fastruby
          "((VALUE(*)(#{value_cast}))0x#{address.to_s(16)})(#{to_c recv}, Qfalse)"
        else

          str_incall_args = nil
          if len == -1
            str_incall_args = "0, (VALUE[]){}, recv"
            value_cast = "int,VALUE*,VALUE"
          elsif len == -2
            str_incall_args = "recv, rb_ary_new4(#{})"
            value_cast = "VALUE,VALUE"
          else
            str_incall_args = "recv"
          end

          wrapper_func = proc { |name| "
            static VALUE #{name}(VALUE recv) {
              // call to #{recvtype}##{mname}
              if (rb_block_given_p()) {
                // no passing block, recall
                return rb_funcall(recv, #{tree[2].to_i}, 0);
              } else {
                return ((VALUE(*)(#{value_cast}))0x#{address.to_s(16)})(#{str_incall_args});
              }
            }
          " }

          anonymous_function(wrapper_func) + "(#{to_c(recv)})"

        end
      else
        value_cast = ( ["VALUE"]*(args.size) ).join(",")
        value_cast = value_cast + ", VALUE" if convention == :fastruby

        wrapper_func = nil
        if convention == :fastruby
          "((VALUE(*)(#{value_cast}))0x#{address.to_s(16)})(#{to_c recv}, Qfalse, #{strargs})"
        else

          str_incall_args = nil
          if len == -1
            str_incall_args = "#{argnum}, (VALUE[]){#{ (1..argnum).map{|x| "_arg"+x.to_s }.join(",")}}, recv"
            value_cast = "int,VALUE*,VALUE"
          elsif len == -2
            str_incall_args = "recv, rb_ary_new4(#{ (1..argnum).map{|x| "_arg"+x.to_s }.join(",")})"
            value_cast = "VALUE,VALUE"
          else
            str_incall_args = "recv, #{ (1..argnum).map{|x| "_arg"+x.to_s }.join(",")}"
          end

          wrapper_func = proc { |name| "
            static VALUE #{name}(VALUE recv, #{ (1..argnum).map{|x| "VALUE _arg"+x.to_s }.join(",")} ) {
              // call to #{recvtype}##{mname}
              if (rb_block_given_p()) {
                // no passing block, recall
                return rb_funcall(recv, #{tree[2].to_i}, #{argnum}, #{ (1..argnum).map{|x| "_arg"+x.to_s }.join(",")});
              } else {
                return ((VALUE(*)(#{value_cast}))0x#{address.to_s(16)})(#{str_incall_args});
              }
            }
          " }

          anonymous_function(wrapper_func) + "(#{to_c(recv)}, #{strargs})"
        end
      end
    else

      if argnum == 0
        "rb_funcall(#{to_c recv}, #{tree[2].to_i}, 0)"
      else
        "rb_funcall(#{to_c recv}, #{tree[2].to_i}, #{argnum}, #{strargs} )"
      end
    end

  else
    if argnum == 0
      "rb_funcall(#{to_c recv}, #{tree[2].to_i}, 0)"
    else
      "rb_funcall(#{to_c recv}, #{tree[2].to_i}, #{argnum}, #{strargs} )"
    end
  end
end

#to_c_defn(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 464

def to_c_defn(tree)
  method_name = tree[1]
  args_tree = tree[2]

  impl_tree = tree[3][1]

  @locals_struct = "struct {
    #{@locals.map{|l| "VALUE #{l};\n"}.join}
    #{args_tree[1..-1].map{|arg| "VALUE #{arg};\n"}.join};
    void* block_function_address;
    VALUE block_function_param;
    }"

  @block_struct = "struct {
    void* block_function_address;
    void* block_function_param;
  }"

  str_impl = ""
  # if impl_tree is a block, implement the last node with a return
  if impl_tree[0] == :block
    str_impl = to_c impl_tree
  else
    if impl_tree[0] != :return
      str_impl = str_impl + ";last_expression = #{to_c(impl_tree)};"
    else
      str_impl = str_impl + ";#{to_c(impl_tree)};"
    end
  end

  strargs = if args_tree.size > 1
    "VALUE block, #{args_tree[1..-1].map{|arg| "VALUE #{arg}" }.join(",") }"
  else
    "VALUE block"
  end

  "VALUE #{@alt_method_name || method_name}(#{strargs}) {
    #{@locals_struct} locals;
    #{@locals_struct} *plocals = (void*)&locals;
    #{@block_struct} *pblock;
    VALUE last_expression;

    #{args_tree[1..-1].map { |arg|
      "locals.#{arg} = #{arg};\n"
    }.join("") }

    locals.self = self;

    pblock = (void*)block;
    if (pblock) {
      locals.block_function_address = pblock->block_function_address;
      locals.block_function_param = (VALUE)pblock->block_function_param;
    } else {
      locals.block_function_address = 0;
      locals.block_function_param = Qnil;
    }

    return #{str_impl};
  }"
end

#to_c_dot2(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 81

def to_c_dot2(tree)
  "rb_range_new(#{to_c tree[1]}, #{to_c tree[2]},0)"
end

#to_c_false(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 580

def to_c_false(tree)
  "Qfalse"
end

#to_c_gasgn(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 537

def to_c_gasgn(tree)
  "_rb_gvar_set((void*)0x#{global_entry(tree[1]).to_s(16)}, #{to_c tree[2]})"
end

#to_c_gvar(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 533

def to_c_gvar(tree)
  "rb_gvar_get((struct global_entry*)0x#{global_entry(tree[1]).to_s(16)})"
end

#to_c_hash(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 434

def to_c_hash(tree)

  hash_aset_code = ""
  (0..(tree.size-3)/2).each do |i|
    strkey = to_c tree[1 + i * 2]
    strvalue = to_c tree[2 + i * 2]
    hash_aset_code << "rb_hash_aset(hash, #{strkey}, #{strvalue});"
  end

  wrapper_func = proc { |name| "
    static VALUE #{name}(VALUE value_params) {
      #{@locals_struct} *plocals = (void*)value_params;
      VALUE hash = rb_hash_new();
      #{hash_aset_code}
      return hash;
    }
  " }

  anonymous_function(wrapper_func) + "((VALUE)#{locals_pointer})"
end

#to_c_iasgn(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 545

def to_c_iasgn(tree)
  "_rb_ivar_set(#{locals_accessor}self,#{tree[1].to_i},#{to_c tree[2]})"
end

#to_c_if(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 600

def to_c_if(tree)
  condition_tree = tree[1]
  impl_tree = tree[2]
  else_tree = tree[3]
  code = "if (RTEST(#{to_c condition_tree})) {
    last_expression = #{to_c impl_tree};
  }
  "

  if (else_tree)
    code = code + " else {
      last_expression = #{to_c else_tree};
    }
    "
  end

  caller_code = proc { |name| "
    static VALUE #{name}(VALUE param) {
      #{@locals_struct} *plocals = (void*)param;
      VALUE last_expression = Qnil;

      #{code};

      return last_expression;
      }
    "
  }

  anonymous_function(caller_code) + "((VALUE)#{locals_pointer})"
end

#to_c_iter(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 89

def to_c_iter(tree)

  call_tree = tree[1]
  args_tree = tree[2]
  recv_tree = call_tree[1]

  directive_code = directive(call_tree)
  if directive_code
    return directive_code
  end

  other_call_tree = call_tree.dup
  other_call_tree[1] = s(:lvar, :arg)

  call_args_tree = call_tree[3]

  caller_code = nil

  str_lvar_initialization = @locals_struct + " *plocals;
                            plocals = (void*)param;"

  recvtype = infer_type(recv_tree || s(:self))

  address = nil
  mobject = nil
  len = nil

  convention = :ruby

  extra_inference = {}

  if recvtype

    inference_complete = true
    signature = [recvtype]

    call_args_tree[1..-1].each do |arg|
      argtype = infer_type(arg)
      if argtype
        signature << argtype
      else
        inference_complete = false
      end
    end

    convention = nil

    if recvtype.respond_to? :method_tree and inference_complete

      if recvtype.method_tree[call_tree[2]]
        mobject = recvtype.build(signature, call_tree[2])
        yield_signature = mobject.yield_signature

        if not args_tree
        elsif args_tree.first == :lasgn
          if yield_signature[0]
          extra_inference[args_tree.last] = yield_signature[0]
          end
        elsif args_tree.first == :masgn
          yield_args = args_tree[1][1..-1].map(&:last)
          (0...yield_signature.size-1).each do |i|
            extra_inference[yield_args[i]] = yield_signature[i]
          end
        end

        convention = :fastruby
      else
        mobject = recvtype.instance_method(call_tree[2])
        convention = :cruby
      end
    else
      mobject = recvtype.instance_method(call_tree[2])
      convention = :cruby
    end

    address = getaddress(mobject)
    len = getlen(mobject)

    unless address
      convention = :ruby
    end

  end

  anonymous_impl = tree[3]

  str_lvar_initialization = @locals_struct + " *plocals;
                              plocals = (void*)param;"

  str_arg_initialization = ""

  str_impl = ""

  with_extra_inference(extra_inference) do
      # if impl_tree is a block, implement the last node with a return
      if anonymous_impl
        if anonymous_impl[0] == :block
          str_impl = anonymous_impl[1..-2].map{ |subtree|
            to_c(subtree)
          }.join(";")

          if anonymous_impl[-1][0] != :return
            str_impl = str_impl + ";last_expression = (#{to_c(anonymous_impl[-1])});"
          else
            str_impl = str_impl + ";#{to_c(anonymous_impl[-1])};"
          end
        else
          if anonymous_impl[0] != :return
            str_impl = str_impl + ";last_expression = (#{to_c(anonymous_impl)});"
          else
            str_impl = str_impl + ";#{to_c(anonymous_impl)};"
          end
        end
      else
        str_impl = "last_expression = Qnil;"
      end

  end

  if convention == :ruby or convention == :cruby

    if call_args_tree.size > 1

      str_called_code_args = call_args_tree[1..-1].map{ |subtree| to_c subtree }.join(",")
      str_recv = to_c recv_tree

      str_recv = "plocals->self" unless recv_tree

        caller_code = proc { |name| "
          static VALUE #{name}(VALUE param) {
            // call to #{call_tree[2]}

            #{str_lvar_initialization}
            return rb_funcall(#{str_recv}, #{call_tree[2].to_i}, #{call_args_tree.size-1}, #{str_called_code_args});
          }
        "
        }

    else
      str_recv = to_c recv_tree
      str_recv = "plocals->self" unless recv_tree

        caller_code = proc { |name| "
          static VALUE #{name}(VALUE param) {
            // call to #{call_tree[2]}
            #{str_lvar_initialization}
            return rb_funcall(#{str_recv}, #{call_tree[2].to_i}, 0);
          }
        "
        }
    end

    if not args_tree
      str_arg_initialization = ""
    elsif args_tree.first == :lasgn
      str_arg_initialization = "plocals->#{args_tree[1]} = arg;"
    elsif args_tree.first == :masgn
      arguments = args_tree[1][1..-1].map(&:last)

      (0..arguments.size-1).each do |i|
        str_arg_initialization << "plocals->#{arguments[i]} = rb_ary_entry(arg,#{i});\n"
      end
    end

    str_arg_initialization

    block_code = proc { |name| "
      static VALUE #{name}(VALUE arg, VALUE param) {
        // block for call to #{call_tree[2]}
        VALUE last_expression = Qnil;

        #{str_lvar_initialization};
        #{str_arg_initialization}
        #{str_impl}

        return last_expression;
      }
    "
    }

    "rb_iterate(#{anonymous_function(caller_code)}, (VALUE)#{locals_pointer}, #{anonymous_function(block_code)}, (VALUE)#{locals_pointer})"
  elsif convention == :fastruby

    str_arg_initialization = ""

    if not args_tree
      str_arg_initialization = ""
    elsif args_tree.first == :lasgn
      str_arg_initialization = "plocals->#{args_tree[1]} = argv[0];"
    elsif args_tree.first == :masgn
      arguments = args_tree[1][1..-1].map(&:last)

      (0..arguments.size-1).each do |i|
        str_arg_initialization << "plocals->#{arguments[i]} = #{i} < argc ? argv[#{i}] : Qnil;\n"
      end
    end

    block_code = proc { |name| "
      static VALUE #{name}(int argc, VALUE* argv, VALUE param) {
        // block for call to #{call_tree[2]}
        VALUE last_expression = Qnil;

        #{str_lvar_initialization};
        #{str_arg_initialization}
        #{str_impl}

        return last_expression;
      }
    "
    }


    str_recv = "plocals->self"

    if recv_tree
       str_recv = to_c recv_tree
    end

    if call_args_tree.size > 1
      value_cast = ( ["VALUE"]*(call_tree[3].size) ).join(",")
      value_cast = value_cast + ", VALUE" if convention == :fastruby

      str_called_code_args = call_tree[3][1..-1].map{|subtree| to_c subtree}.join(",")

        caller_code = proc { |name| "
          static VALUE #{name}(VALUE param) {
            #{@block_struct} block;

            block.block_function_address = (void*)#{anonymous_function(block_code)};
            block.block_function_param = (void*)param;

            // call to #{call_tree[2]}

            #{str_lvar_initialization}

            return ((VALUE(*)(#{value_cast}))0x#{address.to_s(16)})(#{str_recv}, (VALUE)&block, #{str_called_code_args});
          }
        "
        }

    else
        caller_code = proc { |name| "
          static VALUE #{name}(VALUE param) {
            #{@block_struct} block;

            block.block_function_address = (void*)#{anonymous_function(block_code)};
            block.block_function_param = (void*)param;

            // call to #{call_tree[2]}
            #{str_lvar_initialization}

            return ((VALUE(*)(VALUE,VALUE))0x#{address.to_s(16)})(#{str_recv}, (VALUE)&block);
          }
        "
        }
    end

    "#{anonymous_function(caller_code)}((VALUE)#{locals_pointer})"
  end
end

#to_c_ivar(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 541

def to_c_ivar(tree)
  "rb_ivar_get(#{locals_accessor}self,#{tree[1].to_i})"
end

#to_c_lasgn(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 549

def to_c_lasgn(tree)
  if options[:validate_lvar_types]
    klass = @infer_lvar_map[tree[1]]
    if klass

      verify_type_function = proc { |name| "
        static VALUE #{name}(VALUE arg) {
          if (CLASS_OF(arg)!=#{klass.internal_value}) rb_raise(#{TypeMismatchAssignmentException.internal_value}, \"Illegal assignment at runtime (type mismatch)\");
          return arg;
        }
      "
      }


      "_lvar_assing(&#{locals_accessor}#{tree[1]}, #{anonymous_function(verify_type_function)}(#{to_c tree[2]}))"
    else
      "_lvar_assing(&#{locals_accessor}#{tree[1]},#{to_c tree[2]})"
    end
  else
    "_lvar_assing(&#{locals_accessor}#{tree[1]},#{to_c tree[2]})"
  end
end

#to_c_lit(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 422

def to_c_lit(tree)
  "(VALUE)#{tree[1].internal_value}"
end

#to_c_lvar(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 572

def to_c_lvar(tree)
  locals_accessor + tree[1].to_s
end

#to_c_nil(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 426

def to_c_nil(tree)
  "Qnil"
end

#to_c_not(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 596

def to_c_not(tree)
  "RTEST(#{to_c tree[1]}) ? Qfalse : Qtrue"
end

#to_c_or(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 592

def to_c_or(tree)
  "(RTEST(#{to_c tree[1]}) || RTEST(#{to_c tree[2]})) ? Qtrue : Qfalse"
end

#to_c_return(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 418

def to_c_return(tree)
  "return #{to_c(tree[1])};\n"
end

#to_c_self(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 576

def to_c_self(tree)
  locals_accessor + "self"
end

#to_c_str(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 430

def to_c_str(tree)
  "(VALUE)#{tree[1].internal_value}"
end

#to_c_true(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 584

def to_c_true(tree)
  "Qtrue"
end

#to_c_while(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 776

def to_c_while(tree)
  caller_code = proc { |name| "
    static VALUE #{name}(VALUE param) {
      #{@locals_struct} *plocals = (void*)param;
      VALUE last_expression;

      while (#{to_c tree[1]}) {
        #{to_c tree[2]};
      }

      return Qnil;
      }
    "
  }

  anonymous_function(caller_code) + "((VALUE)#{locals_pointer})"
end

#to_c_yield(tree) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 350

def to_c_yield(tree)

  block_code = proc { |name| "
    static VALUE #{name}(VALUE locals_param, VALUE* block_args) {

      #{@locals_struct} *plocals;
      plocals = (void*)locals_param;

      if (plocals->block_function_address == 0) {
        rb_raise(rb_eLocalJumpError, \"no block given\");
      } else {
        return ((VALUE(*)(int,VALUE*,VALUE))plocals->block_function_address)(#{tree.size-1}, block_args, plocals->block_function_param);
      }
    }
  "
  }

  new_yield_signature = tree[1..-1].map{|subtree| infer_type subtree}
  # merge the new_yield_signature with the new
  if @yield_signature
    if new_yield_signature.size == @yield_signature.size
      (0..new_yield_signature.size-1).each do |i|
        if @yield_signature[i] != new_yield_signature[i]
          @yield_signature[i] = nil
        end
      end
    else
      @yield_signature = new_yield_signature.map{|x| nil}
    end
  else
    @yield_signature = new_yield_signature
  end

  if tree.size > 1
    anonymous_function(block_code)+"((VALUE)#{locals_pointer}, (VALUE[]){#{tree[1..-1].map{|subtree| to_c subtree}.join(",")}})"
  else
    anonymous_function(block_code)+"((VALUE)#{locals_pointer}, (VALUE[]){})"
  end
end

#with_extra_inference(extra_inference) ⇒ Object 



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# File 'lib/fastruby/translator.rb', line 810

def with_extra_inference(extra_inference)
  previous_infer_lvar_map = @infer_lvar_map
  begin
    @infer_lvar_map = @infer_lvar_map.merge(extra_inference)
    yield
  ensure
    @infer_lvar_map = previous_infer_lvar_map
  end
end