//
// Main entry point for parser.
// You pass in the expression you want to parse, and you get an
// ExpressionTree out the back end.
//
internal GenericExpressionNode Parse(string expression, XmlAttribute conditionAttributeRef, ParserOptions optionSettings)
{
// We currently have no support (and no scenarios) for disallowing property references
// in Conditions.
ErrorUtilities.VerifyThrow(0 != (optionSettings & ParserOptions.AllowProperties),
"Properties should always be allowed.");
this.conditionAttribute = conditionAttributeRef;
this.options = optionSettings;
lexer = new Scanner(expression, options);
if (!lexer.Advance())
{
errorPosition = lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, this.conditionAttribute, lexer.GetErrorResource(), expression, errorPosition, lexer.UnexpectedlyFound);
}
GenericExpressionNode node = Expr(expression);
if (!lexer.IsNext(Token.TokenType.EndOfInput))
{
errorPosition = lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, this.conditionAttribute, "UnexpectedTokenInCondition", expression, lexer.IsNextString(), errorPosition);
}
return(node);
}
private GenericExpressionNode BooleanTerm(string expression)
{
GenericExpressionNode node = RelationalExpr(expression);
if (node == null)
{
errorPosition = lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, this.conditionAttribute, "UnexpectedTokenInCondition", expression, lexer.IsNextString(), errorPosition);
}
if (!lexer.IsNext(Token.TokenType.EndOfInput))
{
node = BooleanTermPrime(expression, node);
}
return(node);
}
//
// Main entry point for parser.
// You pass in the expression you want to parse, and you get an
// ExpressionTree out the back end.
//
internal GenericExpressionNode Parse(string expression, XmlAttribute conditionAttributeRef, ParserOptions optionSettings)
{
// We currently have no support (and no scenarios) for disallowing property references
// in Conditions.
ErrorUtilities.VerifyThrow(0 != (optionSettings & ParserOptions.AllowProperties),
"Properties should always be allowed.");
this.conditionAttribute = conditionAttributeRef;
this.options = optionSettings;
lexer = new Scanner(expression, options);
if (!lexer.Advance())
{
errorPosition = lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, this.conditionAttribute, lexer.GetErrorResource(), expression, errorPosition, lexer.UnexpectedlyFound);
}
GenericExpressionNode node = Expr(expression);
if (!lexer.IsNext(Token.TokenType.EndOfInput))
{
errorPosition = lexer.GetErrorPosition();
ProjectErrorUtilities.VerifyThrowInvalidProject(false, this.conditionAttribute, "UnexpectedTokenInCondition", expression, lexer.IsNextString(), errorPosition);
}
return node;
}