Module: Minjs::Exp

Included in:
Compressor
Defined in:
lib/minjs/expression.rb

Instance Method Summary collapse

Instance Method Details

#additive_exp(lex, context, options) ⇒ Object

11.6



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# File 'lib/minjs/expression.rb', line 402

def additive_exp(lex, context, options)
  lex.eval_lit {
    a = multiplicative_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_ADD) || lex.match_lit(ECMA262::PUNC_SUB)
      if b = multiplicative_exp(lex, context, options)
        if punc == ECMA262::PUNC_ADD
          t = ECMA262::ExpAdd.new(t, b)
        else
          t = ECMA262::ExpSub.new(t, b)
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#arguments(lex, context, options) ⇒ Object 



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# File 'lib/minjs/expression.rb', line 286

def arguments(lex, context, options)
  lex.eval_lit{
    return nil if lex.match_lit(ECMA262::PUNC_LPARENTHESIS).nil?
    next [] if lex.match_lit(ECMA262::PUNC_RPARENTHESIS)
    args = []
    while true
      if t = assignment_exp(lex, context, options)
        args.push(t)
      else
        return
      end
      if lex.match_lit(ECMA262::PUNC_COMMA)
        ;
      elsif lex.match_lit(ECMA262::PUNC_RPARENTHESIS)
        break
      else
        return
      end
    end
    args
  }
end

#array_literal(lex, context, options) ⇒ Object

11.1.4



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# File 'lib/minjs/expression.rb', line 57

def array_literal(lex, context, options)
  return nil unless lex.match_lit(ECMA262::PUNC_LSQBRAC)
  t = []
  lex.eval_lit {
    while true
      if lex.match_lit(ECMA262::PUNC_COMMA)
        t.push(nil)
      elsif lex.match_lit(ECMA262::PUNC_RSQBRAC)
        break
      elsif a = assignment_exp(lex, context, {})
        t.push(a)
        lex.match_lit(ECMA262::PUNC_COMMA)
      else
        raise ParseError.new("no `]' end of array", lex)
      end
    end
    ECMA262::ECMA262Array.new(t)
  }
end

#assignment_exp(lex, context, options) ⇒ Object

11.13



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# File 'lib/minjs/expression.rb', line 648

def assignment_exp(lex, context, options)
  @logger.debug "*** assignment_exp"

  left_hand = nil
  t = cond_exp(lex, context, options)
  return nil if t.nil?
  lex.eval_lit {
    left_hand = t
    punc = lex.next_lit
    if punc == ECMA262::PUNC_LET ||
       punc == ECMA262::PUNC_DIVLET ||
       punc == ECMA262::PUNC_MULLET ||
       punc == ECMA262::PUNC_MODLET ||
       punc == ECMA262::PUNC_ADDLET ||
       punc == ECMA262::PUNC_SUBLET ||
       punc == ECMA262::PUNC_LSHIFTLET ||
       punc == ECMA262::PUNC_RSHIFTLET ||
       punc == ECMA262::PUNC_URSHIFTLET ||
       punc == ECMA262::PUNC_ANDLET ||
       punc == ECMA262::PUNC_ORLET ||
       punc == ECMA262::PUNC_XORLET
      lex.fwd_lit
      if b = assignment_exp(lex, context, options)
        case punc
        when ECMA262::PUNC_LET
          ECMA262::ExpAssign.new(left_hand, b)
        when ECMA262::PUNC_DIVLET
          ECMA262::ExpDivAssign.new(left_hand, b)
        when ECMA262::PUNC_MULLET
          ECMA262::ExpMulAssign.new(left_hand, b)
        when ECMA262::PUNC_MODLET
          ECMA262::ExpModAssign.new(left_hand, b)
        when ECMA262::PUNC_ADDLET
          ECMA262::ExpAddAssign.new(left_hand, b)
        when ECMA262::PUNC_SUBLET
          ECMA262::ExpSubAssign.new(left_hand, b)
        when ECMA262::PUNC_LSHIFTLET
          ECMA262::ExpLShiftAssign.new(left_hand, b)
        when ECMA262::PUNC_RSHIFTLET
          ECMA262::ExpRShiftAssign.new(left_hand, b)
        when ECMA262::PUNC_URSHIFTLET
          ECMA262::ExpURShiftAssign.new(left_hand, b)
        when ECMA262::PUNC_ANDLET
          ECMA262::ExpAndAssign.new(left_hand, b)
        when ECMA262::PUNC_ORLET
          ECMA262::ExpOrAssign.new(left_hand, b)
        when ECMA262::PUNC_XORLET
          ECMA262::ExpXorAssign.new(left_hand, b)
        else
          raise "internal error"
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    else
      @logger.debug {
        "*** assignment_exp => #{t ? t.to_js : t}"
      }
      t
    end
  }
end

#bitwise_and_exp(lex, context, options) ⇒ Object

11.10 a & b



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# File 'lib/minjs/expression.rb', line 526

def bitwise_and_exp(lex, context, options)
  lex.eval_lit {
    a = equality_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_AND)
      if b = equality_exp(lex, context, options)
        t = ECMA262::ExpAnd.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#bitwise_or_exp(lex, context, options) ⇒ Object

a | b



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# File 'lib/minjs/expression.rb', line 568

def bitwise_or_exp(lex, context, options)
  lex.eval_lit {
    a = bitwise_xor_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_OR)
      if b = bitwise_xor_exp(lex, context, options)
        t = ECMA262::ExpOr.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#bitwise_xor_exp(lex, context, options) ⇒ Object

a ^ b



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# File 'lib/minjs/expression.rb', line 547

def bitwise_xor_exp(lex, context, options)
  lex.eval_lit {
    a = bitwise_and_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_XOR)
      if b = bitwise_and_exp(lex, context, options)
        t = ECMA262::ExpXor.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#call_exp(lex, context, options) ⇒ Object

call

member_exp arguments

call_exp arguments call_exp [exp] call_exp . identifier_name



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# File 'lib/minjs/expression.rb', line 199

def call_exp(lex, context, options)
  a = lex.eval_lit{
    if f = member_exp(lex, context, options)
      if b = arguments(lex, context, options)
        ECMA262::ExpCall.new(f, b)
      else
        f
      end
    else
      nil
    end
  }
  return nil if a.nil?

  t = a

  lex.eval_lit{
    while true
      if b=arguments(lex, context, options)
        t = ECMA262::ExpCall.new(t, b)
      elsif lex.match_lit(ECMA262::PUNC_LSQBRAC)
        if b=exp(lex, context, options) and lex.match_lit(ECMA262::PUNC_RSQBRAC)
          t = ECMA262::ExpPropBrac.new(t, b)
        else
          raise ParseError.new("unexpceted token", lex)
        end
      elsif lex.match_lit(ECMA262::PUNC_PERIOD)
        if (b=lex.fwd_lit()).kind_of?(ECMA262::IdentifierName)
          t = ECMA262::ExpProp.new(t, b)
        else
          raise ParseError.new("unexpceted token", lex)
        end
      else
        break
      end
    end
    t
  } or a
end

#cond_exp(lex, context, options) ⇒ Object

11.12 a ? b : c



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# File 'lib/minjs/expression.rb', line 628

def cond_exp(lex, context, options)
  t = lex.eval_lit {
    a = logical_or_exp(lex, context, options)
    next nil if !a

    if lex.match_lit(ECMA262::PUNC_CONDIF)
      if b=assignment_exp(lex, context, options) and lex.match_lit(ECMA262::PUNC_CONDELSE) and c=assignment_exp(lex, context, options)
        ECMA262::ExpCond.new(a, b, c)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    else
      a
    end
  }
  t
end

#equality_exp(lex, context, options) ⇒ Object

11.9 a == b a != b a === b a !== b



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# File 'lib/minjs/expression.rb', line 493

def equality_exp(lex, context, options)
  lex.eval_lit {
    a = relational_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_EQ) ||
                 lex.match_lit(ECMA262::PUNC_NEQ) ||
                 lex.match_lit(ECMA262::PUNC_SEQ) ||
                 lex.match_lit(ECMA262::PUNC_SNEQ)
      if b = relational_exp(lex, context, options)
        if punc == ECMA262::PUNC_EQ
          t = ECMA262::ExpEq.new(t, b)
        elsif punc == ECMA262::PUNC_NEQ
          t = ECMA262::ExpNotEq.new(t, b)
        elsif punc == ECMA262::PUNC_SEQ
          t = ECMA262::ExpStrictEq.new(t, b)
        elsif punc == ECMA262::PUNC_SNEQ
          t = ECMA262::ExpStrictNotEq.new(t, b)
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#exp(lex, context, options) ⇒ Object

11.14



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# File 'lib/minjs/expression.rb', line 714

def exp(lex, context, options)
  @logger.debug "*** expression"
  lex.eval_lit{
    t = assignment_exp(lex, context, {:hint => :regexp}.merge(options))
    while punc = lex.match_lit(ECMA262::PUNC_COMMA)
      if b = assignment_exp(lex,context, {:hint => :regexp}.merge(options))
        t = ECMA262::ExpComma.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end
    @logger.debug{
      "*** expression => #{t ? t.to_js : t}"
    }
    t
  }
end

#identifier(lex, context) ⇒ Object

11.1.2



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# File 'lib/minjs/expression.rb', line 43

def identifier(lex, context)
  lex.eval_lit {
    if (a = lex.fwd_lit).kind_of? ECMA262::IdentifierName and !a.reserved?
      a.context = context
      a
    else
      nil
    end
  }
end

#left_hand_side_exp(lex, context, options) ⇒ Object

11.2



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# File 'lib/minjs/expression.rb', line 159

def left_hand_side_exp(lex, context, options)
  @logger.debug "*** left_hand_side_exp"

  t = lex.eval_lit{
    call_exp(lex, context, options)
  } || lex.eval_lit{
    new_exp(lex, context, options)
  }
  @logger.debug{
    "*** left_hand_side_exp => #{t ? t.to_js: t}"
  }
  t
end

#logical_and_exp(lex, context, options) ⇒ Object

11.11 a && b



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# File 'lib/minjs/expression.rb', line 589

def logical_and_exp(lex, context, options)
  lex.eval_lit {
    a = bitwise_or_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_LAND)
      if b = bitwise_or_exp(lex, context, options)
        t = ECMA262::ExpLogicalAnd.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#logical_or_exp(lex, context, options) ⇒ Object 



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# File 'lib/minjs/expression.rb', line 607

def logical_or_exp(lex, context, options)
  lex.eval_lit {
    a = logical_and_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_LOR)
      if b = logical_and_exp(lex, context, options)
        t = ECMA262::ExpLogicalOr.new(t, b)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#member_exp(lex, context, options) ⇒ Object

member_exp

primary_exp
function_exp
new member_exp arguments

member_exp[exp]
member_exp.identifier_name #prop(a,b)



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# File 'lib/minjs/expression.rb', line 248

def member_exp(lex, context, options)
  a = lex.eval_lit {
    primary_exp(lex, context, options)
  } || lex.eval_lit {
    func_exp(lex, context)
  } || lex.eval_lit {
    if lex.match_lit(ECMA262::ID_NEW) and a=member_exp(lex, context, options) and b=arguments(lex, context, options)
      ECMA262::ExpNew.new(a, b)
    else
      nil
    end
  }
  return nil if a.nil?

  t = a

  lex.eval_lit {
    while true
      if lex.match_lit(ECMA262::PUNC_LSQBRAC)
        if b=exp(lex, context, options) and lex.match_lit(ECMA262::PUNC_RSQBRAC)
          t = ECMA262::ExpPropBrac.new(t, b)
        else
          raise ParseError.new("unexpceted token", lex)
        end
      elsif lex.match_lit(ECMA262::PUNC_PERIOD)
        if (b=lex.fwd_lit()).kind_of?(ECMA262::IdentifierName)
          t = ECMA262::ExpProp.new(t, b)
        else
          raise ParseError.new("unexpceted token", lex)
        end
      else
        break
      end
    end
    t
  } or a
end

#multiplicative_exp(lex, context, options) ⇒ Object

11.5



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# File 'lib/minjs/expression.rb', line 374

def multiplicative_exp(lex, context, options)
  lex.eval_lit {
    a = unary_exp(lex, context, options)
    next nil if !a
    t = a
    while punc = lex.match_lit(ECMA262::PUNC_MUL) ||
                 lex.match_lit(ECMA262::PUNC_DIV, :hint => :div) ||
                 lex.match_lit(ECMA262::PUNC_MOD)

      if b = unary_exp(lex, context, options)
        if punc == ECMA262::PUNC_MUL
          t = ECMA262::ExpMul.new(t, b)
        elsif punc == ECMA262::PUNC_DIV
          t = ECMA262::ExpDiv.new(t, b)
        else
          t = ECMA262::ExpMod.new(t, b)
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end
    t
  }
end

#new_exp(lex, context, options) ⇒ Object 



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# File 'lib/minjs/expression.rb', line 173

def new_exp(lex, context, options)
  lex.eval_lit{
    if lex.match_lit(ECMA262::ID_NEW)
      if a=new_exp(lex, context, options)
        ECMA262::ExpNew.new(a, nil)
      else
        raise ParseError.new("unexpceted token", lex)
      end
    else
      nil
    end
  } or lex.eval_lit{
    member_exp(lex, context, options)
  }
end

#object_literal(lex, context, options) ⇒ Object

11.1.5



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# File 'lib/minjs/expression.rb', line 79

def object_literal(lex, context, options)
  return nil unless lex.match_lit(ECMA262::PUNC_LCURLYBRAC)
  lex.eval_lit {
    if lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
      next ECMA262::ECMA262Object.new([])
    end
    if h=property_name_and_value_list(lex, context, options)
      ECMA262::ECMA262Object.new(h)
    else
      raise ParseError.new("no `}' end of object", lex)
    end
  }
end

#postfix_exp(lex, context, options) ⇒ Object

11.3



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# File 'lib/minjs/expression.rb', line 311

def postfix_exp(lex, context, options)
  t = lex.eval_lit{
    a = left_hand_side_exp(lex, context, options)
    return nil if a.nil?
    if punc = (lex.match_lit(ECMA262::PUNC_INC, :nolt => true) ||
               lex.match_lit(ECMA262::PUNC_DEC, :nolt => true))
      if punc == ECMA262::PUNC_INC
        ECMA262::ExpPostInc.new(a)
      else
        ECMA262::ExpPostDec.new(a)
      end
    else
      a
    end
  }
  t
end

#primary_exp(lex, context, options) ⇒ Object

Primary Expressions 11.1



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# File 'lib/minjs/expression.rb', line 7

def primary_exp(lex, context, options)
  @logger.debug "*** primary_exp"

  if lex.match_lit(ECMA262::ID_THIS)
  @logger.debug "*** primary_exp => this"
    return ECMA262::ID_THIS
  end
  # (exp)
  if lex.match_lit(ECMA262::PUNC_LPARENTHESIS)
    if a=exp(lex, context, options) and lex.match_lit(ECMA262::PUNC_RPARENTHESIS)
      @logger.debug "*** primary_exp => ()"
      return ECMA262::ExpParen.new(a)
    else
      raise ParseError.new("no `)' at end of expression", lex)
    end
  end

  # identifier || literal || array_literal || object_literal
  t = lex.eval_lit {
    identifier(lex, context)
  } || lex.eval_lit {
    literal(lex, context)
  } || lex.eval_lit {
    array_literal(lex, context, options)
  } || lex.eval_lit {
    object_literal(lex, context, options)
  }
  @logger.debug {
    "*** primary_exp => #{t ? t.to_js : t}"
  }
  t
end

#property_name(lex, context) ⇒ Object 



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# File 'lib/minjs/expression.rb', line 130

def property_name(lex, context)
  lex.eval_lit {
    a = lex.fwd_lit
    if a.kind_of?(ECMA262::ECMA262String)
      a
    elsif a.kind_of?(ECMA262::IdentifierName)
      ECMA262::ECMA262String.new(a.to_js)
    elsif a.kind_of?(ECMA262::ECMA262Numeric)
      a
    else
      nil
    end
  }
end

#property_name_and_value_list(lex, context, options) ⇒ Object

name: exp get name()funcbody set name(args)funcbody



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# File 'lib/minjs/expression.rb', line 98

def property_name_and_value_list(lex, context, options)
  lex.eval_lit{
    h = []
    while !lex.eof?
      if lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
        break
      end
      lex.eval_lit{
        if lex.match_lit(ECMA262::ID_GET) and a=property_name(lex, context) and lex.match_lit(ECMA262::PUNC_LPARENTHESIS) and lex.match_lit(ECMA262::PUNC_RPARENTHESIS) and lex.match_lit(ECMA262::PUNC_LCURLYBRAC) and b=func_body(lex, context) and lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
          h.push([a, ECMA262::StFunc.new(context, ECMA262::ID_GET, [], b, :getter => true)])
        elsif lex.match_lit(ECMA262::ID_SET) and a=property_name(lex, context) and lex.match_lit(ECMA262::PUNC_LPARENTHESIS) and arg=property_set_parameter_list(lex, context) and lex.match_lit(ECMA262::PUNC_RPARENTHESIS) and lex.match_lit(ECMA262::PUNC_LCURLYBRAC) and b=func_body(lex, context) and lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
          h.push([a, ECMA262::StFunc.new(context, ECMA262::ID_SET, arg, b, :setter => true)])
        else
          nil
        end
      } or lex.eval_lit{
        a=property_name(lex, context) and lex.match_lit(ECMA262::PUNC_COLON) and b=assignment_exp(lex, context, options)
        h.push([a, b])
      }

      if lex.match_lit(ECMA262::PUNC_COMMA)
        break if lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
      elsif lex.match_lit(ECMA262::PUNC_RCURLYBRAC)
        break
      else
        raise ParseError.new("no `}' end of object", lex)
      end
    end
    h
  }
end

#property_set_parameter_list(lex, context) ⇒ Object 



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# File 'lib/minjs/expression.rb', line 145

def property_set_parameter_list(lex, context)
  lex.eval_lit {
    a = lex.fwd_lit
    if a.kind_of?(ECMA262::IdentifierName) and !a.reserved?
      [a]
    else
      nil
    end
  }
end

#relational_exp(lex, context, options) ⇒ Object

11.8



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# File 'lib/minjs/expression.rb', line 453

def relational_exp(lex, context, options)
  lex.eval_lit {
    a = shift_exp(lex, context, options)
    next nil if !a

    t = a
    while (punc = lex.match_lit(ECMA262::PUNC_LT) || lex.match_lit(ECMA262::PUNC_GT) ||
                  lex.match_lit(ECMA262::PUNC_LTEQ) || lex.match_lit(ECMA262::PUNC_GTEQ) ||
                  lex.match_lit(ECMA262::ID_INSTANCEOF) || (!options[:no_in] && lex.match_lit(ECMA262::ID_IN)))
      if b = shift_exp(lex, context, options)
        if punc == ECMA262::PUNC_LT
          t = ECMA262::ExpLt.new(t, b)
        elsif punc == ECMA262::PUNC_GT
          t = ECMA262::ExpGt.new(t, b)
        elsif punc == ECMA262::PUNC_LTEQ
          t = ECMA262::ExpLtEq.new(t, b)
        elsif punc == ECMA262::PUNC_GTEQ
          t = ECMA262::ExpGtEq.new(t, b)
        elsif punc.val == :instanceof
          t = ECMA262::ExpInstanceOf.new(t, b)
        elsif !options[:no_in] and punc.val == :in
          t = ECMA262::ExpIn.new(t, b)
        else
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end

    t
  }
end

#shift_exp(lex, context, options) ⇒ Object

11.7



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# File 'lib/minjs/expression.rb', line 425

def shift_exp(lex, context, options)
  lex.eval_lit {
    a = additive_exp(lex, context, options)
    next nil if !a

    t = a
    while punc = lex.match_lit(ECMA262::PUNC_LSHIFT) ||
                 lex.match_lit(ECMA262::PUNC_RSHIFT) ||
                 lex.match_lit(ECMA262::PUNC_URSHIFT)
      if b = additive_exp(lex, context, options)
        if punc == ECMA262::PUNC_LSHIFT
          t = ECMA262::ExpLShift.new(t, b)
        elsif punc == ECMA262::PUNC_RSHIFT
          t = ECMA262::ExpRShift.new(t, b)
        elsif punc == ECMA262::PUNC_URSHIFT
          t = ECMA262::ExpURShift.new(t, b)
        end
      else
        raise ParseError.new("unexpceted token", lex)
      end
    end
    t
  }
end

#unary_exp(lex, context, options) ⇒ Object

11.4



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# File 'lib/minjs/expression.rb', line 332

def unary_exp(lex, context, options)
  lex.eval_lit{
    if punc = (lex.match_lit(ECMA262::ID_DELETE) ||
               lex.match_lit(ECMA262::ID_VOID) ||
               lex.match_lit(ECMA262::ID_TYPEOF) ||
               lex.match_lit(ECMA262::PUNC_INC) ||
               lex.match_lit(ECMA262::PUNC_DEC) ||
               lex.match_lit(ECMA262::PUNC_ADD) ||
               lex.match_lit(ECMA262::PUNC_SUB) ||
               lex.match_lit(ECMA262::PUNC_NOT) ||
               lex.match_lit(ECMA262::PUNC_LNOT))
      a = unary_exp(lex, context, options)
      if a.nil?
        raise ParseError.new("unexpceted token", lex)
      elsif punc.val == :delete
        ECMA262::ExpDelete.new(a)
      elsif punc.val == :void
        ECMA262::ExpVoid.new(a)
      elsif punc.val == :typeof
        ECMA262::ExpTypeof.new(a)
      elsif punc == ECMA262::PUNC_INC
        ECMA262::ExpPreInc.new(a)
      elsif punc == ECMA262::PUNC_DEC
        ECMA262::ExpPreDec.new(a)
      elsif punc == ECMA262::PUNC_ADD
        ECMA262::ExpPositive.new(a)
      elsif punc == ECMA262::PUNC_SUB
        ECMA262::ExpNegative.new(a)
      elsif punc == ECMA262::PUNC_NOT
        ECMA262::ExpBitwiseNot.new(a)
      elsif punc == ECMA262::PUNC_LNOT
        ECMA262::ExpLogicalNot.new(a)
      end
    end
  } || lex.eval_lit{
    postfix_exp(lex, context, options)
  }
end