public bool ParseBlocks(string input)
{
// [expression] opt ended by ";"
// (block)
// [(block) operator (block)]
// [(var op var) operator (var op (block))]
// [(var op var) operator (var op (op var))]
// var & op delimited by ' ' :
// [(str str str) str (str str (str str))]
// op is determined by:
// 1. Outside of any block
// 2. Item 1 if two items
// 3. Even # items if odd # items total
// 4. Error if even # items > 2
// var is determined by:
// Remainders in the lists
// Parse text into useable form
IBlockParser parser = new BlockCharParser(OPEN_TAG, CLOSE_TAG, DELIMITER);
Block expression;
if (parser.ValidateBalancedTags(input))
{
expression = new Block(input, parser);
Console.WriteLine(expression);
}
else
{
Console.WriteLine(parser.Log);
return(false);
}
// Create operations
BooleanExp operation = ParseOperators(expression);
// Create assignment context.
Dictionary <string, string> allAssignments = GetVariablesText(input, ASSIGNMENT_TRIGGER, ASSIGNMENT_OPERATOR);
Dictionary <VariableExp, bool> validAssignments = ConvertVariableAssignment(allAssignments);
Context context = new Context();
context = AssignVariables(validAssignments, context);
// Perform calculation
return(operation.Evaluate(context));
}
public override bool Evaluate(Context aContext)
{
return
(_operand1.Evaluate(aContext) &&
_operand2.Evaluate(aContext));
}