private void HandleQuotedValues()
{
int startPosition = this.token.Position;
do
{
do
{
this.NextChar();
}while (this.ch.HasValue && this.ch != '\'');
if (this.ch == null)
{
throw ParseError(ODataErrorStrings.ExpressionLexer_UnterminatedLiteral(this.textPos, this.Text));
}
this.NextChar();
}while (this.ch.HasValue && this.ch == '\'');
// Update token.Text to include the literal + the quoted value
this.token.Text = this.Text.Substring(startPosition, this.textPos - startPosition);
}
/// <summary>Handles lexemes that are formed by an identifier followed by a quoted string.</summary>
/// <remarks>This method modified the token field as necessary.</remarks>
private void HandleTypePrefixedLiterals()
{
ExpressionTokenKind id = this.token.Kind;
if (id != ExpressionTokenKind.Identifier)
{
return;
}
bool quoteFollows = this.ch == '\'';
if (!quoteFollows)
{
return;
}
string tokenText = this.token.Text;
if (String.Equals(tokenText, ExpressionConstants.LiteralPrefixDuration, StringComparison.OrdinalIgnoreCase))
{
id = ExpressionTokenKind.DurationLiteral;
}
else if (String.Equals(tokenText, ExpressionConstants.LiteralPrefixBinary, StringComparison.OrdinalIgnoreCase))
{
id = ExpressionTokenKind.BinaryLiteral;
}
else if (String.Equals(tokenText, ExpressionConstants.LiteralPrefixGeography, StringComparison.OrdinalIgnoreCase))
{
id = ExpressionTokenKind.GeographyLiteral;
}
else if (String.Equals(tokenText, ExpressionConstants.LiteralPrefixGeometry, StringComparison.OrdinalIgnoreCase))
{
id = ExpressionTokenKind.GeometryLiteral;
}
else if (string.Equals(tokenText, ExpressionConstants.KeywordNull, StringComparison.OrdinalIgnoreCase))
{
// typed null literals are not supported.
throw ParseError(ODataErrorStrings.ExpressionLexer_SyntaxError(this.textPos, this.Text));
}
else
{
// treat as quoted literal
id = ExpressionTokenKind.QuotedLiteral;
}
int tokenPos = this.token.Position;
do
{
this.NextChar();
}while (this.ch.HasValue && this.ch != '\'');
if (this.ch == null)
{
throw ParseError(ODataErrorStrings.ExpressionLexer_UnterminatedLiteral(this.textPos, this.Text));
}
this.NextChar();
this.token.Kind = id;
this.token.Text = this.Text.Substring(tokenPos, this.textPos - tokenPos);
}
