/// <summary>
/// Parses a literal.
/// Precondition: lexer is at a literal token type: Boolean, DateTime, Decimal, Null, String, Int64, Integer, Double, Single, Guid, Binary.
/// </summary>
/// <returns>The literal query token or null if something else was found.</returns>
private object TryParseLiteral()
{
DebugUtils.CheckNoExternalCallers();
Debug.Assert(ExpressionLexer.IsLiteralType(this.CurrentToken.Kind), "TryParseLiteral called when not at a literal type token");
switch (this.CurrentToken.Kind)
{
case ExpressionTokenKind.BooleanLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetBoolean(false)));
case ExpressionTokenKind.DateTimeLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetTemporal(EdmPrimitiveTypeKind.DateTime, false)));
case ExpressionTokenKind.DecimalLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetDecimal(false)));
case ExpressionTokenKind.NullLiteral:
return(this.ParseNullLiteral());
case ExpressionTokenKind.StringLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetString(true)));
case ExpressionTokenKind.Int64Literal:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetInt64(false)));
case ExpressionTokenKind.IntegerLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetInt32(false)));
case ExpressionTokenKind.DoubleLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetDouble(false)));
case ExpressionTokenKind.SingleLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetSingle(false)));
case ExpressionTokenKind.GuidLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetGuid(false)));
case ExpressionTokenKind.BinaryLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetBinary(true)));
case ExpressionTokenKind.DateTimeOffsetLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetDateTimeOffset(false)));
case ExpressionTokenKind.TimeLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetTemporal(EdmPrimitiveTypeKind.Time, false)));
case ExpressionTokenKind.GeographyLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetSpatial(EdmPrimitiveTypeKind.Geography, false)));
case ExpressionTokenKind.GeometryLiteral:
return(this.ParseTypedLiteral(EdmCoreModel.Instance.GetSpatial(EdmPrimitiveTypeKind.Geometry, false)));
}
return(null);
}
/// <summary>Reads the next token, checks that it is a literal token type, converts to to a Common Language Runtime value as appropriate, and returns the value.</summary>
/// <returns>The value represented by the next token.</returns>
internal object ReadLiteralToken()
{
DebugUtils.CheckNoExternalCallers();
this.NextToken();
if (ExpressionLexer.IsLiteralType(this.CurrentToken.Kind))
{
return(this.TryParseLiteral());
}
throw new ODataException(o.Strings.ExpressionLexer_ExpectedLiteralToken(this.CurrentToken.Text));
}