private object Calculate(ScriptBinaryOperator op, object leftValue, Type leftType, object rightValue, Type rightType)
{
var customType = leftValue as IScriptCustomType ?? rightValue as IScriptCustomType;
if (customType != null)
{
return(customType.EvaluateBinaryExpression(this, leftValue, rightValue));
}
// The order matters: double, float, long, int
if (leftType == typeof(double))
{
var rightDouble = (double)ScriptValueConverter.ToObject(Span, rightValue, typeof(double));
return(Calculate(op, (double)leftValue, rightDouble));
}
if (rightType == typeof(double))
{
var leftDouble = (double)ScriptValueConverter.ToObject(Span, leftValue, typeof(double));
return(Calculate(op, leftDouble, (double)rightValue));
}
if (leftType == typeof(float))
{
var rightFloat = (float)ScriptValueConverter.ToObject(Span, rightValue, typeof(float));
return(Calculate(op, (float)leftValue, rightFloat));
}
if (rightType == typeof(float))
{
var leftFloat = (float)ScriptValueConverter.ToObject(Span, leftValue, typeof(float));
return(Calculate(op, leftFloat, (float)rightValue));
}
if (leftType == typeof(long))
{
var rightLong = (long)ScriptValueConverter.ToObject(Span, rightValue, typeof(long));
return(Calculate(op, (long)leftValue, rightLong));
}
if (rightType == typeof(long))
{
var leftLong = (long)ScriptValueConverter.ToObject(Span, leftValue, typeof(long));
return(Calculate(op, leftLong, (long)rightValue));
}
if (leftType == typeof(int) || (leftType != null && leftType.GetTypeInfo().IsEnum))
{
var rightInt = (int)ScriptValueConverter.ToObject(Span, rightValue, typeof(int));
return(Calculate(op, (int)leftValue, rightInt));
}
if (rightType == typeof(int) || (rightType != null && rightType.GetTypeInfo().IsEnum))
{
var leftInt = (int)ScriptValueConverter.ToObject(Span, leftValue, typeof(int));
return(Calculate(op, leftInt, (int)rightValue));
}
throw new ScriptRuntimeException(Span, $"Unsupported types [{leftValue ?? "null"}/{leftType?.ToString() ?? "null"}] {op.ToText()} [{rightValue ?? "null"}/{rightType?.ToString() ?? "null"}] for binary operation");
}
public object Evaluate(TemplateContext context, ScriptNode callerContext, ScriptArray parameters, ScriptBlockStatement blockStatement)
{
// Check parameters
if ((hasObjectParams && parameters.Count < parametersInfo.Length - 1) || (!hasObjectParams && parameters.Count != parametersInfo.Length))
{
throw new ScriptRuntimeException(callerContext.Span, $"Invalid number of arguments passed [{parameters.Count}] while expecting [{parametersInfo.Length}] for [{callerContext}]");
}
// Convert arguments
var arguments = new object[parametersInfo.Length];
object[] paramArguments = null;
if (hasObjectParams)
{
paramArguments = new object[parameters.Count - lastParamsIndex];
arguments[lastParamsIndex] = paramArguments;
}
for (int i = 0; i < parameters.Count; i++)
{
var destType = hasObjectParams && i >= lastParamsIndex ? typeof(object) : parametersInfo[i].ParameterType;
try
{
var argValue = ScriptValueConverter.ToObject(callerContext.Span, parameters[i], destType);
if (hasObjectParams && i >= lastParamsIndex)
{
paramArguments[i - lastParamsIndex] = argValue;
}
else
{
arguments[i] = argValue;
}
}
catch (Exception exception)
{
throw new ScriptRuntimeException(callerContext.Span, $"Unable to convert parameter #{i} of type [{parameters[i]?.GetType()}] to type [{destType}]", exception);
}
}
// Call method
try
{
var result = method.Invoke(target, arguments);
return(result);
}
catch (Exception exception)
{
throw new ScriptRuntimeException(callerContext.Span, $"Unexpected exception when calling {callerContext}", exception);
}
}
private object CalculateToString(ScriptBinaryOperator op, object left, object right)
{
switch (op)
{
case ScriptBinaryOperator.Add:
return(ScriptValueConverter.ToString(Span, left) + ScriptValueConverter.ToString(Span, right));
case ScriptBinaryOperator.Multiply:
if (right is int)
{
var temp = left;
left = right;
right = temp;
}
if (left is int)
{
var rightText = ScriptValueConverter.ToString(Span, right);
var builder = new StringBuilder();
for (int i = 0; i < (int)left; i++)
{
builder.Append(rightText);
}
return(builder.ToString());
}
throw new ScriptRuntimeException(Span, $"Operator [{op.ToText()}] is not supported for the expression [{this}]. Only working on string x int or int x string"); // unit test: 112-binary-string-error1.txt
case ScriptBinaryOperator.CompareEqual:
return(ScriptValueConverter.ToString(Span, left) == ScriptValueConverter.ToString(Span, right));
case ScriptBinaryOperator.CompareNotEqual:
return(ScriptValueConverter.ToString(Span, left) != ScriptValueConverter.ToString(Span, right));
case ScriptBinaryOperator.CompareGreater:
return(ScriptValueConverter.ToString(Span, left).CompareTo(ScriptValueConverter.ToString(Span, right)) > 0);
case ScriptBinaryOperator.CompareLess:
return(ScriptValueConverter.ToString(Span, left).CompareTo(ScriptValueConverter.ToString(Span, right)) < 0);
case ScriptBinaryOperator.CompareGreaterOrEqual:
return(ScriptValueConverter.ToString(Span, left).CompareTo(ScriptValueConverter.ToString(Span, right)) >= 0);
case ScriptBinaryOperator.CompareLessOrEqual:
return(ScriptValueConverter.ToString(Span, left).CompareTo(ScriptValueConverter.ToString(Span, right)) <= 0);
}
// unit test: 150-range-expression-error1.out.txt
throw new ScriptRuntimeException(Span, $"Operator [{op.ToText()}] is not supported on string objects"); // unit test: 112-binary-string-error2.txt
}
public override void Evaluate(TemplateContext context)
{
var leftValueOriginal = context.Evaluate(Left);
var leftValue = leftValueOriginal;
var rightValueOriginal = context.Evaluate(Right);
object rightValue = rightValueOriginal;
if (Operator == ScriptBinaryOperator.EmptyCoalescing)
{
context.Result = leftValue ?? rightValue;
return;
}
else if (Operator == ScriptBinaryOperator.And || Operator == ScriptBinaryOperator.Or)
{
var leftBoolValue = ScriptValueConverter.ToBool(leftValue);
var rightBoolValue = ScriptValueConverter.ToBool(rightValue);
if (Operator == ScriptBinaryOperator.And)
{
context.Result = leftBoolValue && rightBoolValue;
}
else
{
context.Result = leftBoolValue || rightBoolValue;
}
return;
}
else
{
switch (Operator)
{
case ScriptBinaryOperator.ShiftLeft:
case ScriptBinaryOperator.ShiftRight:
if (leftValue is IList || rightValue is IList)
{
// Special path for IList to allow custom binary expression
context.Result = ScriptArray.CustomOperator.EvaluateBinaryExpression(this, leftValue,
rightValue);
return;
}
break;
case ScriptBinaryOperator.CompareEqual:
case ScriptBinaryOperator.CompareNotEqual:
case ScriptBinaryOperator.CompareGreater:
case ScriptBinaryOperator.CompareLess:
case ScriptBinaryOperator.CompareGreaterOrEqual:
case ScriptBinaryOperator.CompareLessOrEqual:
case ScriptBinaryOperator.Add:
case ScriptBinaryOperator.Substract:
case ScriptBinaryOperator.Multiply:
case ScriptBinaryOperator.Divide:
case ScriptBinaryOperator.DivideRound:
case ScriptBinaryOperator.Modulus:
case ScriptBinaryOperator.RangeInclude:
case ScriptBinaryOperator.RangeExclude:
var leftType = leftValue?.GetType();
var rightType = rightValue?.GetType();
if (leftValue is string || rightValue is string)
{
context.Result = CalculateToString(Operator, leftValue, rightValue);
{
// TODO: Log an error if CalculateToString return null?
//context.LogError(Span, $"Operation [{Operator}] on strings not supported");
}
}
else
{
context.Result = Calculate(Operator, leftValue, leftType, rightValue, rightType);
}
return;
}
}
throw new ScriptRuntimeException(Span, $"Operator [{Operator.ToText()}] is not implemented for the left [{Left}] / right [{Right}]");
}
private TKey TransformToKey(string member)
{
return((TKey)ScriptValueConverter.ToObject(new SourceSpan(), member, typeof(TKey)));
}
public override void Evaluate(TemplateContext context)
{
switch (Operator)
{
case ScriptUnaryOperator.Not:
{
var value = context.Evaluate(Right);
context.Result = !ScriptValueConverter.ToBool(value);
}
break;
case ScriptUnaryOperator.Negate:
case ScriptUnaryOperator.Plus:
{
var value = context.Evaluate(Right);
bool negate = Operator == ScriptUnaryOperator.Negate;
var customType = value as IScriptCustomType;
if (customType != null)
{
context.Result = customType.EvaluateUnaryExpression(this);
}
else if (value != null)
{
if (value is int)
{
context.Result = negate ? -((int)value) : value;
}
else if (value is double)
{
context.Result = negate ? -((double)value) : value;
}
else if (value is float)
{
context.Result = negate ? -((float)value) : value;
}
else if (value is long)
{
context.Result = negate ? -((long)value) : value;
}
else
{
throw new ScriptRuntimeException(this.Span,
$"Unexpected value [{value} / Type: {value?.GetType()}]. Cannot negate(-)/positive(+) a non-numeric value");
}
}
}
break;
case ScriptUnaryOperator.FunctionAlias:
context.Result = context.Evaluate(Right, true);
break;
case ScriptUnaryOperator.FunctionParametersExpand:
// Function parameters expand is done at the function level, so here, we simply return the actual list
Right?.Evaluate(context);
break;
default:
throw new ScriptRuntimeException(Span, $"Operator [{Operator}] is not supported");
}
}