/// <summary>
/// Parses the eq, ne, lt, gt, le, ge, has, and in operators.
/// </summary>
/// <returns>The lexical token representing the expression.</returns>
private QueryToken ParseComparison()
{
this.RecurseEnter();
QueryToken left = this.ParseAdditive();
while (true)
{
if (this.TokenIdentifierIs(ExpressionConstants.KeywordIn))
{
this.lexer.NextToken();
QueryToken right = this.ParseAdditive();
left = new InToken(left, right);
}
else
{
BinaryOperatorKind binaryOperatorKind;
if (this.TokenIdentifierIs(ExpressionConstants.KeywordEqual))
{
binaryOperatorKind = BinaryOperatorKind.Equal;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordNotEqual))
{
binaryOperatorKind = BinaryOperatorKind.NotEqual;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordGreaterThan))
{
binaryOperatorKind = BinaryOperatorKind.GreaterThan;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordGreaterThanOrEqual))
{
binaryOperatorKind = BinaryOperatorKind.GreaterThanOrEqual;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordLessThan))
{
binaryOperatorKind = BinaryOperatorKind.LessThan;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordLessThanOrEqual))
{
binaryOperatorKind = BinaryOperatorKind.LessThanOrEqual;
}
else if (this.TokenIdentifierIs(ExpressionConstants.KeywordHas))
{
binaryOperatorKind = BinaryOperatorKind.Has;
}
else
{
break;
}
this.lexer.NextToken();
QueryToken right = this.ParseAdditive();
left = new BinaryOperatorToken(binaryOperatorKind, left, right);
}
}
this.RecurseLeave();
return(left);
}
/// <summary>
/// Binds an In operator token.
/// </summary>
/// <param name="inToken">The In operator token to bind.</param>
/// <param name="state">State of the metadata binding.</param>
/// <returns>The bound In operator token.</returns>
internal QueryNode BindInOperator(InToken inToken, BindingState state)
{
ExceptionUtils.CheckArgumentNotNull(inToken, "inToken");
SingleValueNode left = this.GetSingleValueOperandFromToken(inToken.Left);
CollectionNode right = this.GetCollectionOperandFromToken(
inToken.Right, new EdmCollectionTypeReference(new EdmCollectionType(left.TypeReference)), state.Model);
return(new InNode(left, right));
}
/// <summary>
/// Binds an In token.
/// </summary>
/// <param name="inToken">The In token to bind.</param>
/// <returns>The bound In token.</returns>
protected virtual QueryNode BindIn(InToken inToken)
{
Func <QueryToken, QueryNode> InBinderMethod = (queryToken) =>
{
ExceptionUtils.CheckArgumentNotNull(queryToken, "queryToken");
if (queryToken.Kind == QueryTokenKind.Literal)
{
return(LiteralBinder.BindInLiteral((LiteralToken)queryToken));
}
return(this.Bind(queryToken));
};
InBinder inBinder = new InBinder(InBinderMethod);
return(inBinder.BindInOperator(inToken, this.BindingState));
}
/// <summary>
/// Binds an In token.
/// </summary>
/// <param name="inToken">The In token to bind.</param>
/// <returns>The bound In token.</returns>
protected virtual QueryNode BindIn(InToken inToken)
{
InBinder inBinder = new InBinder(this.Bind);
return(inBinder.BindInOperator(inToken, this.BindingState));
}