/// <summary>
/// Parser for EachStatement
/// </summary>
/// <returns>Parsed EachStatement</returns>
public EachStatement ParseEachStatement()
{
EachStatement eachStatement = new EachStatement();
//Skip each token
NextToken("each", "each (identifier : expression) Statement", "each");
//Skip ( token
NextToken("(", "each (identifier : expression) Statement", '(');
//Parse identifier
CurrentToken = TokenStream.NextToken();
eachStatement.SetIdentifier(CurrentToken.GetValue().ToString());
//Skip : token
NextToken(":", "each (identifier : expression) Statement", ':');
//Parse expression
eachStatement.SetExpression(expressionParser.ParseExpression());
//Skip ) token
NextToken(")", "each (identifier : expression) Statement", ')');
//Parse statement
eachStatement.SetStatement(ParseStatement());
return(eachStatement);
}
/// <summary>
/// Parser for ExpressionArgument
/// </summary>
/// <returns>ExpressionArgument</returns>
public Argument ParseExpressionArgument()
{
ExpressionArgument argument = new ExpressionArgument();
//Parse expression
argument.SetExpression(expressionParser.ParseExpression());
return(argument);
}
public void ParseCatExpressionTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("expression+'symbol"));
Expression expression = expressionParser.ParseExpression();
//Check type of expression
Assert.AreEqual(typeof(CatExpression), expression.GetType());
CatExpression parsedCatExpression = (CatExpression)expression;
//Check expressions in catexpression
Assert.AreEqual(typeof(VarExpression), parsedCatExpression.GetLeftExpression().GetType());
Assert.AreEqual(typeof(SymExpression), parsedCatExpression.GetRightExpression().GetType());
VarExpression left = (VarExpression) parsedCatExpression.GetLeftExpression();
SymExpression right = (SymExpression)parsedCatExpression.GetRightExpression();
Assert.AreEqual("expression", left.GetVariableIdentifier());
Assert.AreEqual("symbol", right.GetSym());
}
/// <summary>
/// Parser for Predicate
/// </summary>
/// <returns>Parsed Predicate</returns>
public Predicate ParsePredicate()
{
Predicate predicate = null; //Empty predicate
if (TokenStream.HasNext() && TokenStream.Peek(1).GetValue().ToString() == "!")
{ //Not Predicate
NotPredicate notPredicate = new NotPredicate();
//Skip ! token
NextToken("!", "! predicate", '!');
//Parse predicate after !
notPredicate.SetPredicate(ParsePredicate());
predicate = notPredicate;
}
else
{ //Other predicates exists out of an expression
Expression expression = expressionParser.ParseExpression();
if (TokenStream.HasNext() && TokenStream.Peek(1).GetValue().ToString() == ".")
{ //IsPredicate
predicate = ParseIsPredicate(expression);
}
else
{ //ExpressionPredicate
predicate = ParseExpressionPredicate(expression);
}
}
//Check for && or || predicates
if (TokenStream.HasNext() && TokenStream.Peek(1).GetValue().ToString() == "&" && TokenStream.Peek(2).GetValue().ToString() == "&")
{ //AndPredicate
return(ParseAndPredicate(predicate));
}
else if (TokenStream.HasNext() && TokenStream.Peek(1).GetValue().ToString() == "|" && TokenStream.Peek(2).GetValue().ToString() == "|")
{ //OrPredicate
return(ParseOrPredicate(predicate));
}
return(predicate);
}
/// <summary>
/// Parser for Embed
/// </summary>
/// <returns>Parsed Embed</returns>
public Embed ParseEmbed()
{
Embed embed = null;
NodeList markupList = new NodeList();
//Set up MarkupParser
markupParser = new MarkupParser(EmbeddingTokenStream);
//Parse Markup*
//EmbeddingTokenStream.HasNext(2) && !(EmbeddingTokenStream.Peek(2).GetValue().ToString() == ">"
while (NextTokenIsMarkup())
{
markupList.Add(markupParser.ParseMarkup());
}
//Check if an expression is remaining, otherwise embed is MarkupEmbedding
if (IsExpressionRemaining())
{ //ExpressionEmbedding
ExpressionEmbed expressionEmbed = new ExpressionEmbed();
//Add already parsed markups to expressionEmbed
expressionEmbed.SetMarkups(markupList);
//Set up expressionparser
expressionParser = new ExpressionParser(EmbeddingTokenStream);
//Parse expression
expressionEmbed.SetExpression(expressionParser.ParseExpression());
embed = expressionEmbed;
}
else
{ //MarkupEmbedding
//Get last item from markupList and add it as Markup
if (markupList.Count != 0)
{
Markup markup = (Markup)markupList.Get(markupList.Count - 1);
markupList.Remove(markupList.Count - 1);
MarkupEmbed markupEmbed = new MarkupEmbed();
markupEmbed.SetMarkups(markupList);
markupEmbed.SetMarkup(markup);
embed = markupEmbed;
}
else
{ //Markup* Markup must contain at least one markup element
throw new UnexpectedToken("Markup expected, but found:", CurrentToken.GetValue().ToString(), CurrentToken.GetLine());
}
}
/*//Determine if remaining embed is Markup or Expression
* if (NextTokenIsMarkup())
* { //MarkupEmbedding
* MarkupEmbed markupEmbed = new MarkupEmbed();
*
* //Add already parsed markups to markupEmbed
* markupEmbed.SetMarkups(markupList);
*
* //Parse latest markup
* markupEmbed.SetMarkup(markupParser.ParseMarkup());
*
* embed = markupEmbed;
* }
* else
* { //ExpressionEmbedding
* ExpressionEmbed expressionEmbed = new ExpressionEmbed();
*
* //Add already parsed markups to expressionEmbed
* expressionEmbed.SetMarkups(markupList);
*
* //Set up expressionparser
* expressionParser = new ExpressionParser(EmbeddingTokenStream);
*
* //Parse expression
* expressionEmbed.SetExpression(expressionParser.ParseExpression());
*
* embed = expressionEmbed;
* } */
return(embed);
}
public void ParseIsPredicateTest()
{
//Create parser
PredicateParser predicateParser = new PredicateParser(Init(".string?"));
ExpressionParser expressionParser = new ExpressionParser(Init("test"));
Expression parsedExpression = expressionParser.ParseExpression();
IsPredicate parsedIsPredicate = predicateParser.ParseIsPredicate(parsedExpression);
//Check expression
Assert.AreEqual(typeof(VarExpression), parsedIsPredicate.GetExpression().GetType());
Assert.AreEqual("test", parsedIsPredicate.GetExpression().ToString());
//Check type
Assert.AreEqual(typeof(StringType), parsedIsPredicate.GetType().GetType());
}
public void ParseFieldExpressionTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("expressie.identifier"));
Expression expression = expressionParser.ParseExpression();
//Test type of expression
Assert.AreEqual(typeof(FieldExpression), expression.GetType());
FieldExpression parsedFieldExpression = (FieldExpression)expression;
//Test field members
Assert.AreEqual("expressie", parsedFieldExpression.GetExpression().ToString());
Assert.AreEqual(typeof(VarExpression), parsedFieldExpression.GetExpression().GetType());
Assert.AreEqual("identifier", parsedFieldExpression.GetIdentifier());
}
public void ParseExpressionTest()
{
//Create parser and parse tokens
ExpressionParser expressionParser = new ExpressionParser(Init("expressie.identifier"));
Expression expression = expressionParser.ParseExpression();
//Test type of expression
Assert.AreEqual(typeof(FieldExpression), expression.GetType());
}
/// <summary>
/// Parser for Embed
/// </summary>
/// <returns>Parsed Embed</returns>
public Embed ParseEmbed()
{
Embed embed = null;
NodeList markupList = new NodeList();
//Set up MarkupParser
markupParser = new MarkupParser(EmbeddingTokenStream);
//Parse Markup*
//EmbeddingTokenStream.HasNext(2) && !(EmbeddingTokenStream.Peek(2).GetValue().ToString() == ">"
while(NextTokenIsMarkup())
{
markupList.Add(markupParser.ParseMarkup());
}
//Check if an expression is remaining, otherwise embed is MarkupEmbedding
if (IsExpressionRemaining())
{ //ExpressionEmbedding
ExpressionEmbed expressionEmbed = new ExpressionEmbed();
//Add already parsed markups to expressionEmbed
expressionEmbed.SetMarkups(markupList);
//Set up expressionparser
expressionParser = new ExpressionParser(EmbeddingTokenStream);
//Parse expression
expressionEmbed.SetExpression(expressionParser.ParseExpression());
embed = expressionEmbed;
}
else
{ //MarkupEmbedding
//Get last item from markupList and add it as Markup
if (markupList.Count != 0)
{
Markup markup = (Markup)markupList.Get(markupList.Count - 1);
markupList.Remove(markupList.Count - 1);
MarkupEmbed markupEmbed = new MarkupEmbed();
markupEmbed.SetMarkups(markupList);
markupEmbed.SetMarkup(markup);
embed = markupEmbed;
}
else
{ //Markup* Markup must contain at least one markup element
throw new UnexpectedToken("Markup expected, but found:", CurrentToken.GetValue().ToString(), CurrentToken.GetLine());
}
}
/*//Determine if remaining embed is Markup or Expression
if (NextTokenIsMarkup())
{ //MarkupEmbedding
MarkupEmbed markupEmbed = new MarkupEmbed();
//Add already parsed markups to markupEmbed
markupEmbed.SetMarkups(markupList);
//Parse latest markup
markupEmbed.SetMarkup(markupParser.ParseMarkup());
embed = markupEmbed;
}
else
{ //ExpressionEmbedding
ExpressionEmbed expressionEmbed = new ExpressionEmbed();
//Add already parsed markups to expressionEmbed
expressionEmbed.SetMarkups(markupList);
//Set up expressionparser
expressionParser = new ExpressionParser(EmbeddingTokenStream);
//Parse expression
expressionEmbed.SetExpression(expressionParser.ParseExpression());
embed = expressionEmbed;
} */
return embed;
}
