public static bool IsOperatorSimple(BinaryOperatorExpression binaryOperatorExpression, IEmitter emitter)
{
var leftResolverResult = emitter.Resolver.ResolveNode(binaryOperatorExpression.Left, emitter);
var rightResolverResult = emitter.Resolver.ResolveNode(binaryOperatorExpression.Right, emitter);
bool leftIsSimple = binaryOperatorExpression.Left is PrimitiveExpression || leftResolverResult.Type.IsKnownType(KnownTypeCode.String) ||
leftResolverResult.Type.IsReferenceType != null && !leftResolverResult.Type.IsReferenceType.Value;
bool rightIsSimple = binaryOperatorExpression.Right is PrimitiveExpression || rightResolverResult.Type.IsKnownType(KnownTypeCode.String) ||
rightResolverResult.Type.IsReferenceType != null && !rightResolverResult.Type.IsReferenceType.Value;
bool isSimpleConcat = leftIsSimple && rightIsSimple;
if (!isSimpleConcat)
{
var be = binaryOperatorExpression.Left as BinaryOperatorExpression;
leftIsSimple = be != null?BinaryOperatorBlock.IsOperatorSimple(be, emitter) : leftIsSimple;
be = binaryOperatorExpression.Right as BinaryOperatorExpression;
rightIsSimple = be != null?BinaryOperatorBlock.IsOperatorSimple(be, emitter) : rightIsSimple;
isSimpleConcat = leftIsSimple && rightIsSimple;
}
return(isSimpleConcat);
}
protected void VisitBinaryOperatorExpression()
{
BinaryOperatorExpression binaryOperatorExpression = this.BinaryOperatorExpression;
if (this.Emitter.IsAsync && (
binaryOperatorExpression.Operator == BinaryOperatorType.BitwiseAnd ||
binaryOperatorExpression.Operator == BinaryOperatorType.BitwiseOr ||
binaryOperatorExpression.Operator == BinaryOperatorType.ConditionalOr ||
binaryOperatorExpression.Operator == BinaryOperatorType.ConditionalAnd
) && this.GetAwaiters(binaryOperatorExpression).Length > 0)
{
if (this.Emitter.AsyncBlock.WrittenAwaitExpressions.Contains(binaryOperatorExpression))
{
var index = System.Array.IndexOf(this.Emitter.AsyncBlock.AwaitExpressions, binaryOperatorExpression) + 1;
this.Write(JS.Vars.ASYNC_TASK_RESULT + index);
}
else
{
var index = System.Array.IndexOf(this.Emitter.AsyncBlock.AwaitExpressions, binaryOperatorExpression) + 1;
this.WriteAsyncBinaryExpression(index);
}
return;
}
var resolveOperator = this.Emitter.Resolver.ResolveNode(binaryOperatorExpression, this.Emitter);
var expectedType = this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression);
bool isDecimalExpected = Helpers.IsDecimalType(expectedType, this.Emitter.Resolver);
bool isDecimal = Helpers.IsDecimalType(resolveOperator.Type, this.Emitter.Resolver);
bool isLongExpected = Helpers.Is64Type(expectedType, this.Emitter.Resolver);
bool isLong = Helpers.Is64Type(resolveOperator.Type, this.Emitter.Resolver);
OperatorResolveResult orr = resolveOperator as OperatorResolveResult;
var leftResolverResult = this.Emitter.Resolver.ResolveNode(binaryOperatorExpression.Left, this.Emitter);
var rightResolverResult = this.Emitter.Resolver.ResolveNode(binaryOperatorExpression.Right, this.Emitter);
var charToString = -1;
string variable = null;
bool leftIsNull = this.BinaryOperatorExpression.Left is NullReferenceExpression;
bool rightIsNull = this.BinaryOperatorExpression.Right is NullReferenceExpression;
bool isUint = resolveOperator.Type.IsKnownType(KnownTypeCode.UInt16) ||
resolveOperator.Type.IsKnownType(KnownTypeCode.UInt32) ||
resolveOperator.Type.IsKnownType(KnownTypeCode.UInt64);
var isFloatResult = Helpers.IsFloatType(resolveOperator.Type, this.Emitter.Resolver);
var leftExpected = this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Left);
var rightExpected = this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Right);
var strictNullChecks = this.Emitter.AssemblyInfo.StrictNullChecks;
if (orr != null && orr.Type.IsKnownType(KnownTypeCode.String))
{
for (int i = 0; i < orr.Operands.Count; i++)
{
var crr = orr.Operands[i] as ConversionResolveResult;
if (crr != null && crr.Input.Type.IsKnownType(KnownTypeCode.Char))
{
charToString = i;
}
}
}
if (resolveOperator is ConstantResolveResult)
{
this.WriteScript(((ConstantResolveResult)resolveOperator).ConstantValue);
return;
}
var resultIsString = expectedType.IsKnownType(KnownTypeCode.String) || resolveOperator.Type.IsKnownType(KnownTypeCode.String);
var isStringConcat = resultIsString && binaryOperatorExpression.Operator == BinaryOperatorType.Add;
var toStringForLeft = false;
var toStringForRight = false;
var parentBinary = binaryOperatorExpression.Parent as BinaryOperatorExpression;
bool parentIsString = resultIsString && parentBinary != null && parentBinary.Operator == BinaryOperatorType.Add;
if (parentIsString)
{
var parentResolveOperator = this.Emitter.Resolver.ResolveNode(binaryOperatorExpression.Parent, this.Emitter) as OperatorResolveResult;
if (parentResolveOperator != null && parentResolveOperator.UserDefinedOperatorMethod != null || BinaryOperatorBlock.IsOperatorSimple(parentBinary, this.Emitter))
{
parentIsString = false;
}
}
bool isSimpleConcat = isStringConcat && BinaryOperatorBlock.IsOperatorSimple(binaryOperatorExpression, this.Emitter);
if (charToString == -1 && isStringConcat && !leftResolverResult.Type.IsKnownType(KnownTypeCode.String))
{
toStringForLeft = true;
}
if (charToString == -1 && isStringConcat && !rightResolverResult.Type.IsKnownType(KnownTypeCode.String))
{
toStringForRight = true;
}
if (!isStringConcat && (Helpers.IsDecimalType(leftResolverResult.Type, this.Emitter.Resolver) || Helpers.IsDecimalType(rightResolverResult.Type, this.Emitter.Resolver)))
{
isDecimal = true;
isDecimalExpected = true;
}
if (isDecimal && isDecimalExpected && binaryOperatorExpression.Operator != BinaryOperatorType.NullCoalescing)
{
this.HandleDecimal(resolveOperator);
return;
}
var isLeftLong = Helpers.Is64Type(leftExpected, this.Emitter.Resolver);
var isRightLong = Helpers.Is64Type(rightExpected, this.Emitter.Resolver);
if (!isLeftLong && !isRightLong)
{
if (leftExpected.Kind == TypeKind.Enum && Helpers.Is64Type(leftExpected.GetDefinition().EnumUnderlyingType, this.Emitter.Resolver))
{
isLeftLong = true;
}
if (rightExpected.Kind == TypeKind.Enum && Helpers.Is64Type(rightExpected.GetDefinition().EnumUnderlyingType, this.Emitter.Resolver))
{
isRightLong = true;
}
}
if (!(resultIsString && binaryOperatorExpression.Operator == BinaryOperatorType.Add) && (isLeftLong || isRightLong))
{
isLong = true;
isLongExpected = true;
}
if (isLong && isLongExpected && binaryOperatorExpression.Operator != BinaryOperatorType.NullCoalescing)
{
if (!isFloatResult || binaryOperatorExpression.Operator == BinaryOperatorType.Divide && isLeftLong)
{
this.HandleLong(resolveOperator, isUint);
return;
}
}
var delegateOperator = false;
if (this.ResolveOperator(binaryOperatorExpression, orr))
{
return;
}
if (binaryOperatorExpression.Operator == BinaryOperatorType.Equality || binaryOperatorExpression.Operator == BinaryOperatorType.InEquality)
{
if (leftIsNull || rightIsNull)
{
this.WritePart(binaryOperatorExpression.Left, toStringForLeft, leftResolverResult);
if (binaryOperatorExpression.Operator == BinaryOperatorType.Equality)
{
this.Write(strictNullChecks ? " === " : " == ");
}
else
{
this.Write(strictNullChecks ? " !== " : " != ");
}
this.WritePart(binaryOperatorExpression.Right, toStringForRight, rightResolverResult);
return;
}
}
var insideOverflowContext = ConversionBlock.InsideOverflowContext(this.Emitter, binaryOperatorExpression);
if (binaryOperatorExpression.Operator == BinaryOperatorType.Divide && this.Emitter.Rules.Integer == IntegerRule.Managed &&
!(this.Emitter.IsJavaScriptOverflowMode && !insideOverflowContext) &&
(
(Helpers.IsIntegerType(leftResolverResult.Type, this.Emitter.Resolver) &&
Helpers.IsIntegerType(rightResolverResult.Type, this.Emitter.Resolver)) ||
(Helpers.IsIntegerType(this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Left), this.Emitter.Resolver) &&
Helpers.IsIntegerType(this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Right), this.Emitter.Resolver))
))
{
this.Write(JS.Types.BRIDGE_INT + "." + JS.Funcs.Math.DIV + "(");
this.WritePart(binaryOperatorExpression.Left, toStringForLeft, leftResolverResult);
this.Write(", ");
this.WritePart(binaryOperatorExpression.Right, toStringForRight, rightResolverResult);
this.Write(")");
return;
}
if (binaryOperatorExpression.Operator == BinaryOperatorType.Multiply && this.Emitter.Rules.Integer == IntegerRule.Managed &&
!(this.Emitter.IsJavaScriptOverflowMode && !insideOverflowContext) &&
(
(Helpers.IsInteger32Type(leftResolverResult.Type, this.Emitter.Resolver) &&
Helpers.IsInteger32Type(rightResolverResult.Type, this.Emitter.Resolver) &&
Helpers.IsInteger32Type(resolveOperator.Type, this.Emitter.Resolver)) ||
(Helpers.IsInteger32Type(this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Left), this.Emitter.Resolver) &&
Helpers.IsInteger32Type(this.Emitter.Resolver.Resolver.GetExpectedType(binaryOperatorExpression.Right), this.Emitter.Resolver) &&
Helpers.IsInteger32Type(resolveOperator.Type, this.Emitter.Resolver))
))
{
isUint = NullableType.GetUnderlyingType(resolveOperator.Type).IsKnownType(KnownTypeCode.UInt32);
this.Write(JS.Types.BRIDGE_INT + "." + (isUint ? JS.Funcs.Math.UMUL : JS.Funcs.Math.MUL) + "(");
this.WritePart(binaryOperatorExpression.Left, toStringForLeft, leftResolverResult);
this.Write(", ");
this.WritePart(binaryOperatorExpression.Right, toStringForRight, rightResolverResult);
if (ConversionBlock.IsInCheckedContext(this.Emitter, this.BinaryOperatorExpression))
{
this.Write(", 1");
}
this.Write(")");
return;
}
if (binaryOperatorExpression.Operator == BinaryOperatorType.Add ||
binaryOperatorExpression.Operator == BinaryOperatorType.Subtract)
{
var add = binaryOperatorExpression.Operator == BinaryOperatorType.Add;
if (expectedType.Kind == TypeKind.Delegate || this.Emitter.Validator.IsDelegateOrLambda(leftResolverResult) && this.Emitter.Validator.IsDelegateOrLambda(rightResolverResult))
{
delegateOperator = true;
this.Write(add ? JS.Funcs.BRIDGE_COMBINE : JS.Funcs.BRIDGE_REMOVE);
this.WriteOpenParentheses();
}
}
this.NullStringCheck = isStringConcat && !parentIsString && isSimpleConcat;
if (isStringConcat && !parentIsString && !isSimpleConcat)
{
this.Write(JS.Types.System.String.CONCAT);
this.WriteOpenParentheses();
}
bool nullable = orr != null && orr.IsLiftedOperator;
bool isCoalescing = (this.Emitter.AssemblyInfo.StrictNullChecks ||
NullableType.IsNullable(leftResolverResult.Type) ||
leftResolverResult.Type.IsKnownType(KnownTypeCode.String) ||
leftResolverResult.Type.IsKnownType(KnownTypeCode.Object)
) && binaryOperatorExpression.Operator == BinaryOperatorType.NullCoalescing;
string root = JS.Types.SYSTEM_NULLABLE + ".";
bool special = nullable;
bool rootSpecial = nullable;
bool isBool = NullableType.IsNullable(resolveOperator.Type) ? NullableType.GetUnderlyingType(resolveOperator.Type).IsKnownType(KnownTypeCode.Boolean) : resolveOperator.Type.IsKnownType(KnownTypeCode.Boolean);
bool toBool = isBool && !rootSpecial && !delegateOperator && (binaryOperatorExpression.Operator == BinaryOperatorType.BitwiseAnd || binaryOperatorExpression.Operator == BinaryOperatorType.BitwiseOr);
bool isRefEquals = !isCoalescing && !strictNullChecks &&
(binaryOperatorExpression.Operator == BinaryOperatorType.InEquality || binaryOperatorExpression.Operator == BinaryOperatorType.Equality) &&
leftExpected.IsReferenceType.HasValue && leftExpected.IsReferenceType.Value &&
rightExpected.IsReferenceType.HasValue && rightExpected.IsReferenceType.Value;
if (rootSpecial)
{
this.Write(root);
}
else if (!isRefEquals)
{
if (isCoalescing)
{
this.Write("(");
variable = this.GetTempVarName();
this.Write(variable);
this.Write(" = ");
}
else if (charToString == 0)
{
this.Write(JS.Funcs.STRING_FROMCHARCODE + "(");
}
if (toBool)
{
this.Write("!!(");
}
this.WritePart(binaryOperatorExpression.Left, toStringForLeft, leftResolverResult, isCoalescing);
if (isCoalescing)
{
this.Write(", ");
this.Write(variable);
this.Write(strictNullChecks ? " !== null" : " != null");
this.Write(" ? ");
ConversionBlock.expressionMap.Add(binaryOperatorExpression.Left, variable);
//this.Write(variable);
binaryOperatorExpression.Left.AcceptVisitor(this.Emitter);
ConversionBlock.expressionMap.Remove(binaryOperatorExpression.Left);
}
else if (charToString == 0)
{
this.Write(")");
}
}
if (isRefEquals)
{
if (binaryOperatorExpression.Operator == BinaryOperatorType.InEquality)
{
this.Write("!");
}
this.Write(JS.Funcs.BRIDGE_REFERENCEEQUALS);
special = true;
}
if (!delegateOperator && (!isStringConcat || isSimpleConcat))
{
if (!special)
{
this.WriteSpace();
}
switch (binaryOperatorExpression.Operator)
{
case BinaryOperatorType.Add:
this.Write(rootSpecial ? JS.Funcs.Math.ADD : "+");
break;
case BinaryOperatorType.BitwiseAnd:
if (isBool)
{
this.Write(rootSpecial ? JS.Funcs.Math.AND : "&");
}
else
{
this.Write(rootSpecial ? JS.Funcs.Math.BAND : "&");
}
break;
case BinaryOperatorType.BitwiseOr:
if (isBool)
{
this.Write(rootSpecial ? JS.Funcs.Math.OR : "|");
}
else
{
this.Write(rootSpecial ? JS.Funcs.Math.BOR : "|");
}
break;
case BinaryOperatorType.ConditionalAnd:
this.Write(rootSpecial ? JS.Funcs.Math.AND : "&&");
break;
case BinaryOperatorType.NullCoalescing:
this.Write(isCoalescing ? ":" : "||");
break;
case BinaryOperatorType.ConditionalOr:
this.Write(rootSpecial ? JS.Funcs.Math.OR : "||");
break;
case BinaryOperatorType.Divide:
this.Write(rootSpecial ? JS.Funcs.Math.DIV : "/");
break;
case BinaryOperatorType.Equality:
if (!isRefEquals)
{
this.Write(rootSpecial ? "eq" : "===");
}
break;
case BinaryOperatorType.ExclusiveOr:
this.Write(rootSpecial ? JS.Funcs.Math.XOR : "^");
break;
case BinaryOperatorType.GreaterThan:
this.Write(rootSpecial ? JS.Funcs.Math.GT : ">");
break;
case BinaryOperatorType.GreaterThanOrEqual:
this.Write(rootSpecial ? JS.Funcs.Math.GTE : ">=");
break;
case BinaryOperatorType.InEquality:
if (!isRefEquals)
{
this.Write(rootSpecial ? "neq" : "!==");
}
break;
case BinaryOperatorType.LessThan:
this.Write(rootSpecial ? JS.Funcs.Math.LT : "<");
break;
case BinaryOperatorType.LessThanOrEqual:
this.Write(rootSpecial ? JS.Funcs.Math.LTE : "<=");
break;
case BinaryOperatorType.Modulus:
this.Write(rootSpecial ? JS.Funcs.Math.MOD : "%");
break;
case BinaryOperatorType.Multiply:
this.Write(rootSpecial ? JS.Funcs.Math.MUL : "*");
break;
case BinaryOperatorType.ShiftLeft:
this.Write(rootSpecial ? JS.Funcs.Math.SL : "<<");
break;
case BinaryOperatorType.ShiftRight:
if (isUint)
{
this.Write(rootSpecial ? JS.Funcs.Math.SRR : ">>>");
}
else
{
this.Write(rootSpecial ? JS.Funcs.Math.SR : ">>");
}
break;
case BinaryOperatorType.Subtract:
this.Write(rootSpecial ? JS.Funcs.Math.SUB : "-");
break;
default:
throw new EmitterException(binaryOperatorExpression, "Unsupported binary operator: " + binaryOperatorExpression.Operator.ToString());
}
}
else
{
this.WriteComma();
}
if (special)
{
this.WriteOpenParentheses();
if (charToString == 0)
{
this.Write(JS.Funcs.STRING_FROMCHARCODE + "(");
}
this.WritePart(binaryOperatorExpression.Left, toStringForLeft, leftResolverResult);
if (charToString == 0)
{
this.Write(")");
}
this.WriteComma();
}
else if (!delegateOperator && (!isStringConcat || isSimpleConcat))
{
this.WriteSpace();
}
if (charToString == 1)
{
this.Write(JS.Funcs.STRING_FROMCHARCODE + "(");
}
this.WritePart(binaryOperatorExpression.Right, toStringForRight, rightResolverResult);
if (toBool)
{
this.WriteCloseParentheses();
}
if (charToString == 1 || isCoalescing)
{
this.WriteCloseParentheses();
}
if (delegateOperator || special || isStringConcat && !parentIsString && !isSimpleConcat)
{
this.WriteCloseParentheses();
}
}