public void ParseRecordExpressionTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("{token1:\"token1\", token2:10, token3:'symbol}"));
RecordExpression expression = expressionParser.ParseRecordExpression();
//Test Record contents
Assert.AreEqual(3, expression.GetRecords().Count);
List <ISyntaxNode> .Enumerator recordEnumerator = expression.GetRecords().GetEnumerator();
recordEnumerator.MoveNext();
KeyValuePair current = (KeyValuePair)recordEnumerator.Current;
Assert.AreEqual("token1", current.GetKey());
Assert.AreEqual(typeof(TextExpression), current.GetValue().GetType());
Assert.AreEqual("\"token1\"", current.GetValue().ToString());
recordEnumerator.MoveNext();
current = (KeyValuePair)recordEnumerator.Current;
Assert.AreEqual("token2", current.GetKey());
Assert.AreEqual(typeof(NumExpression), current.GetValue().GetType());
Assert.AreEqual(10, ((NumExpression)current.GetValue()).GetNum());
recordEnumerator.MoveNext();
current = (KeyValuePair)recordEnumerator.Current;
Assert.AreEqual("token3", current.GetKey());
Assert.AreEqual(typeof(SymExpression), current.GetValue().GetType());
Assert.AreEqual("'symbol", current.GetValue().ToString());
}
/// <summary>
/// Retrieve concrete expression of an fieldexpression
/// </summary>
/// <param name="expression">FieldExpression</param>
/// <returns>Concrete expression</returns>
private Expression GetExpression(FieldExpression expression)
{
Expression expr = expression.GetExpression();
//Get real expression, not a variable
while (expr is VarExpression)
{
expr = SymbolTable.GetVariableDefinition(((VarExpression)expr).GetVariableIdentifier());
}
//Get specific record from recordExpression
if (expr is RecordExpression)
{
RecordExpression record = (RecordExpression)expr;
ISyntaxNode[] recordArray = record.GetRecords().ToArray();
foreach (KeyValuePair pair in recordArray)
{
if (pair.GetKey() == expression.GetIdentifier())
{
return(pair.GetValue());
}
}
}
return(null);
}
/// <summary>
/// Interpret RecordExpression
/// </summary>
/// <param name="expression">RecordExpression to interpret</param>
public override void Visit(RecordExpression expression)
{
//convert record to textvalue
String tempRecord = "{";
for (int i = 0; i < expression.GetRecords().Count; i++)
{
KeyValuePair pair = (KeyValuePair)expression.GetRecords().Get(i);
//Convert KeyValuePair to textual representation
tempRecord += pair.GetKey() + ":";
pair.GetValue().AcceptVisitor(this);
tempRecord += TextValue;
//Add seperator
if (i != (expression.GetRecords().Count - 1))
{
tempRecord += ",";
}
}
tempRecord += "}";
TextValue = tempRecord;
}