private static bool NeedsParens(AstNode node, JSToken refToken)
{
bool needsParens = false;
// assignments and commas are the only operators that need parens
// around them. Conditional is pretty low down the list
BinaryOperator binaryOp = node as BinaryOperator;
if (binaryOp != null)
{
OpPrec thisPrecedence = JSScanner.GetOperatorPrecedence(refToken);
OpPrec nodePrecedence = JSScanner.GetOperatorPrecedence(binaryOp.OperatorToken);
needsParens = (nodePrecedence < thisPrecedence);
}
return(needsParens);
}
private static OpPrec[] InitOperatorsPrec()
{
OpPrec[] operatorsPrec = new OpPrec[JSToken.LastOperator - JSToken.FirstBinaryOperator + 1];
operatorsPrec[JSToken.Plus - JSToken.FirstBinaryOperator] = OpPrec.precAdditive;
operatorsPrec[JSToken.Minus - JSToken.FirstBinaryOperator] = OpPrec.precAdditive;
operatorsPrec[JSToken.LogicalOr - JSToken.FirstBinaryOperator] = OpPrec.precLogicalOr;
operatorsPrec[JSToken.LogicalAnd - JSToken.FirstBinaryOperator] = OpPrec.precLogicalAnd;
operatorsPrec[JSToken.BitwiseOr - JSToken.FirstBinaryOperator] = OpPrec.precBitwiseOr;
operatorsPrec[JSToken.BitwiseXor - JSToken.FirstBinaryOperator] = OpPrec.precBitwiseXor;
operatorsPrec[JSToken.BitwiseAnd - JSToken.FirstBinaryOperator] = OpPrec.precBitwiseAnd;
operatorsPrec[JSToken.Equal - JSToken.FirstBinaryOperator] = OpPrec.precEquality;
operatorsPrec[JSToken.NotEqual - JSToken.FirstBinaryOperator] = OpPrec.precEquality;
operatorsPrec[JSToken.StrictEqual - JSToken.FirstBinaryOperator] = OpPrec.precEquality;
operatorsPrec[JSToken.StrictNotEqual - JSToken.FirstBinaryOperator] = OpPrec.precEquality;
operatorsPrec[JSToken.InstanceOf - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.In - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.GreaterThan - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.LessThan - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.LessThanEqual - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.GreaterThanEqual - JSToken.FirstBinaryOperator] = OpPrec.precRelational;
operatorsPrec[JSToken.LeftShift - JSToken.FirstBinaryOperator] = OpPrec.precShift;
operatorsPrec[JSToken.RightShift - JSToken.FirstBinaryOperator] = OpPrec.precShift;
operatorsPrec[JSToken.UnsignedRightShift - JSToken.FirstBinaryOperator] = OpPrec.precShift;
operatorsPrec[JSToken.Multiply - JSToken.FirstBinaryOperator] = OpPrec.precMultiplicative;
operatorsPrec[JSToken.Divide - JSToken.FirstBinaryOperator] = OpPrec.precMultiplicative;
operatorsPrec[JSToken.Modulo - JSToken.FirstBinaryOperator] = OpPrec.precMultiplicative;
operatorsPrec[JSToken.Assign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.PlusAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.MinusAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.MultiplyAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.DivideAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.BitwiseAndAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.BitwiseOrAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.BitwiseXorAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.ModuloAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.LeftShiftAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.RightShiftAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.UnsignedRightShiftAssign - JSToken.FirstBinaryOperator] = OpPrec.precAssignment;
operatorsPrec[JSToken.ConditionalIf - JSToken.FirstBinaryOperator] = OpPrec.precConditional;
operatorsPrec[JSToken.Colon - JSToken.FirstBinaryOperator] = OpPrec.precConditional;
operatorsPrec[JSToken.Comma - JSToken.FirstBinaryOperator] = OpPrec.precComma;
return operatorsPrec;
}
private static OpPrec[] InitPPOperatorsPrec() {
OpPrec[] operatorsPrec = new OpPrec[JSToken.LastPPOperator - JSToken.FirstBinaryOp + 1];
operatorsPrec[JSToken.Plus - JSToken.FirstBinaryOp] = OpPrec.precAdditive;
operatorsPrec[JSToken.Minus - JSToken.FirstBinaryOp] = OpPrec.precAdditive;
operatorsPrec[JSToken.LogicalOr - JSToken.FirstBinaryOp] = OpPrec.precLogicalOr;
operatorsPrec[JSToken.LogicalAnd - JSToken.FirstBinaryOp] = OpPrec.precLogicalAnd;
operatorsPrec[JSToken.BitwiseOr - JSToken.FirstBinaryOp] = OpPrec.precBitwiseOr;
operatorsPrec[JSToken.BitwiseXor - JSToken.FirstBinaryOp] = OpPrec.precBitwiseXor;
operatorsPrec[JSToken.BitwiseAnd - JSToken.FirstBinaryOp] = OpPrec.precBitwiseAnd;
operatorsPrec[JSToken.Equal - JSToken.FirstBinaryOp] = OpPrec.precEquality;
operatorsPrec[JSToken.NotEqual - JSToken.FirstBinaryOp] = OpPrec.precEquality;
operatorsPrec[JSToken.StrictEqual - JSToken.FirstBinaryOp] = OpPrec.precEquality;
operatorsPrec[JSToken.StrictNotEqual - JSToken.FirstBinaryOp] = OpPrec.precEquality;
operatorsPrec[JSToken.GreaterThan - JSToken.FirstBinaryOp] = OpPrec.precRelational;
operatorsPrec[JSToken.LessThan - JSToken.FirstBinaryOp] = OpPrec.precRelational;
operatorsPrec[JSToken.LessThanEqual - JSToken.FirstBinaryOp] = OpPrec.precRelational;
operatorsPrec[JSToken.GreaterThanEqual - JSToken.FirstBinaryOp] = OpPrec.precRelational;
operatorsPrec[JSToken.LeftShift - JSToken.FirstBinaryOp] = OpPrec.precShift;
operatorsPrec[JSToken.RightShift - JSToken.FirstBinaryOp] = OpPrec.precShift;
operatorsPrec[JSToken.UnsignedRightShift - JSToken.FirstBinaryOp] = OpPrec.precShift;
operatorsPrec[JSToken.Multiply - JSToken.FirstBinaryOp] = OpPrec.precMultiplicative;
operatorsPrec[JSToken.Divide - JSToken.FirstBinaryOp] = OpPrec.precMultiplicative;
operatorsPrec[JSToken.Modulo - JSToken.FirstBinaryOp] = OpPrec.precMultiplicative;
return operatorsPrec;
}
internal OpListItem(JSToken op, OpPrec prec, OpListItem prev)
{
this._prev = prev;
this._operator = op;
this._prec = prec;
}
private static OpPrec[] InitOperatorsPrec()
{
OpPrec[] precArray = new OpPrec[0x24];
precArray[0] = OpPrec.precAdditive;
precArray[1] = OpPrec.precAdditive;
precArray[2] = OpPrec.precLogicalOr;
precArray[3] = OpPrec.precLogicalAnd;
precArray[4] = OpPrec.precBitwiseOr;
precArray[5] = OpPrec.precBitwiseXor;
precArray[6] = OpPrec.precBitwiseAnd;
precArray[7] = OpPrec.precEquality;
precArray[8] = OpPrec.precEquality;
precArray[9] = OpPrec.precEquality;
precArray[10] = OpPrec.precEquality;
precArray[0x15] = OpPrec.precRelational;
precArray[0x16] = OpPrec.precRelational;
precArray[11] = OpPrec.precRelational;
precArray[12] = OpPrec.precRelational;
precArray[13] = OpPrec.precRelational;
precArray[14] = OpPrec.precRelational;
precArray[15] = OpPrec.precShift;
precArray[0x10] = OpPrec.precShift;
precArray[0x11] = OpPrec.precShift;
precArray[0x12] = OpPrec.precMultiplicative;
precArray[0x13] = OpPrec.precMultiplicative;
precArray[20] = OpPrec.precMultiplicative;
precArray[0x17] = OpPrec.precAssignment;
precArray[0x18] = OpPrec.precAssignment;
precArray[0x19] = OpPrec.precAssignment;
precArray[0x1a] = OpPrec.precAssignment;
precArray[0x1b] = OpPrec.precAssignment;
precArray[0x1c] = OpPrec.precAssignment;
precArray[0x1d] = OpPrec.precAssignment;
precArray[30] = OpPrec.precAssignment;
precArray[0x1f] = OpPrec.precAssignment;
precArray[0x20] = OpPrec.precAssignment;
precArray[0x21] = OpPrec.precAssignment;
precArray[0x22] = OpPrec.precAssignment;
precArray[0x23] = OpPrec.precConditional;
return precArray;
}
//internal OpAssoc _assoc;
internal OpListItem(JSToken op, OpPrec prec, /*OpAssoc assoc,*/ OpListItem prev){
_prev = prev;
_operator = op;
_prec = prec;
//_assoc = assoc;
}
internal OpListItem(JSToken op, OpPrec prec, OpListItem prev)
{
this._prev = prev;
this._operator = op;
this._prec = prec;
}
