private static ExpressionBase ParseMathematic(PositionalTokenizer tokenizer, ExpressionBase left, MathematicOperation operation, int joinerLine, int joinerColumn)
{
OperationPriority priority;
switch (operation)
{
case MathematicOperation.Add:
if (left is StringConstantExpression)
{
priority = OperationPriority.AppendString;
break;
}
priority = OperationPriority.AddSubtract;
break;
case MathematicOperation.Subtract:
priority = OperationPriority.AddSubtract;
break;
case MathematicOperation.Multiply:
case MathematicOperation.Divide:
case MathematicOperation.Modulus:
priority = OperationPriority.MulDivMod;
break;
case MathematicOperation.BitwiseAnd:
priority = OperationPriority.BitwiseAnd;
break;
default:
return(new ParseErrorExpression("Unknown operator: " + operation));
}
var right = ParseExpression(tokenizer, priority);
switch (right.Type)
{
case ExpressionType.ParseError:
return(right);
case ExpressionType.Comparison: // will be rebalanced
case ExpressionType.Conditional: // will be rebalanced
case ExpressionType.FloatConstant:
case ExpressionType.FunctionCall:
case ExpressionType.IntegerConstant:
case ExpressionType.Mathematic:
case ExpressionType.StringConstant:
case ExpressionType.Variable:
break;
default:
var expressionTokenizer = tokenizer as ExpressionTokenizer;
if (expressionTokenizer != null)
{
expressionTokenizer.QueueExpression(right);
}
right = new KeywordExpression(MathematicExpression.GetOperatorCharacter(operation).ToString(), joinerLine, joinerColumn);
return(ParseError(tokenizer, "Incompatible mathematical operation", right));
}
if (priority == OperationPriority.AddSubtract)
{
var mathematicRight = right as MathematicExpression;
}
return(new MathematicExpression(left, operation, right));
}
private static ExpressionBase ParseMathematic(PositionalTokenizer tokenizer, ExpressionBase left, MathematicOperation operation, int joinerLine, int joinerColumn)
{
var right = ExpressionBase.Parse(tokenizer);
switch (right.Type)
{
case ExpressionType.ParseError:
return(right);
case ExpressionType.Comparison:
case ExpressionType.Conditional:
case ExpressionType.Dictionary:
case ExpressionType.FunctionCall:
case ExpressionType.IntegerConstant:
case ExpressionType.Mathematic:
case ExpressionType.StringConstant:
case ExpressionType.Variable:
break;
default:
ParseError(tokenizer, "incompatible mathematical operation", new KeywordExpression(MathematicExpression.GetOperatorCharacter(operation).ToString(), joinerLine, joinerColumn));
break;
}
return(new MathematicExpression(left, operation, right));
}