Parsing of expression with cast fails

[nborelli]

Dynamic Expresso Version 0.11.0.0

The following expression parses correctly:

(double) 1

However, this expression does not parse correctly:

((double) 1)

This is a problem if we want to cast an object and then access a member of that object.

For example accessing a property that is IDictionary<string, object>:

((DateTime)Values["key"]).Year

Will throw an exception.

Here is the parsing error I get:

DynamicExpresso.ParseException: ')' or operator expected (at index 12).
at DynamicExpresso.ExpressionParser.ValidateToken(TokenId t, String errorMessage)
at DynamicExpresso.ExpressionParser.ParseParenExpression()
at DynamicExpresso.ExpressionParser.ParsePrimaryStart()
at DynamicExpresso.ExpressionParser.ParsePrimary()
at DynamicExpresso.ExpressionParser.ParseUnary()
at DynamicExpresso.ExpressionParser.ParseMultiplicative()
at DynamicExpresso.ExpressionParser.ParseAdditive()
at DynamicExpresso.ExpressionParser.ParseTypeTesting()
at DynamicExpresso.ExpressionParser.ParseComparison()
at DynamicExpresso.ExpressionParser.ParseLogicalAnd()
at DynamicExpresso.ExpressionParser.ParseLogicalOr()
at DynamicExpresso.ExpressionParser.ParseConditional()
at DynamicExpresso.ExpressionParser.ParseExpressionSegment()
at DynamicExpresso.ExpressionParser.ParseExpressionSegment(Type returnType)
at DynamicExpresso.ExpressionParser.Parse()
at DynamicExpresso.Interpreter.ParseExpression(String expressionText, Type

[davideicardi]

You are right, it is a bug. I have just fixed it in version 0.11.1.

Thank you for submitting this issue.

[nborelli]

Thanks for the quick response!